criyle/codenet-compile-errors huggingface dataset:
Language: C

#include <stdio.h>

#define N 100000
 
int arr[N];

void part(int P, int R){
  int x = arr[r];
  int i = P - 1, j;
  for(j = P;j < R;j++){
    if(arr[j] <= x){
      i++;
      sw(&arr[i], &arr[j]);
    }
  }
  sw(&arr[i+1], &arr[R]);
  for(j = P;j <= r;j++){
    if(j != P) printf(" ");
    if(j == i+1) printf("[%d]", arr[j]);
    else printf("%d", arr[j]);
  }
  printf("\n");
}
 void sw(int *x, int *y){
  int tmp;
  tmp = *x;
  *x = *y;
  *y = tmp;
}
int  main(int argc,char *argv[]){
  int n, i;
  scanf("%d", &n);
  for(i = 0;i < n;i++) scanf("%d", &arr[i]);
  part(0, n-1);

  return 0;
}

Compiler output:
main.c: In function 'part':
main.c:8:15: error: 'r' undeclared (first use in this function)
    8 |   int x = arr[r];
      |               ^
main.c:8:15: note: each undeclared identifier is reported only once for each function it appears in
main.c:13:7: error: implicit declaration of function 'sw' [-Wimplicit-function-declaration]
   13 |       sw(&arr[i], &arr[j]);
      |       ^~
main.c: At top level:
main.c:24:7: warning: conflicting types for 'sw'; have 'void(int *, int *)'
   24 |  void sw(int *x, int *y){
      |       ^~
main.c:13:7: note: previous implicit declaration of 'sw' with type 'void(int *, int *)'
   13 |       sw(&arr[i], &arr[j]);
      |       ^~
Language: C

 void sw(int *x, int *y){
  int tmp;
  tmp = *x;
  *x = *y;
  *y = tmp;
}
void part(int P, int R){
  int x = arr[R];
  int i = P - 1, j;
  for(j = P;j < R;j++){
    if(arr[j] <= x){
      i++;
      sw(&arr[i], &arr[j]);
    }
  }
  sw(&arr[i+1], &arr[R]);
  for(j = P;j <= R;j++){
    if(j != P) printf(" ");
    if(j == i+1) printf("[%d]", arr[j]);
    else printf("%d", arr[j]);
  }
  printf("\n");
}
 
int  main(int argc,char *argv[]){
  int n, i;
  scanf("%d", &n);
  for(i = 0;i < n;i++) scanf("%d", &arr[i]);
  part(0, n-1);

  return 0;
}

Compiler output:
main.c: In function 'part':
main.c:8:11: error: 'arr' undeclared (first use in this function)
    8 |   int x = arr[R];
      |           ^~~
main.c:8:11: note: each undeclared identifier is reported only once for each function it appears in
main.c:18:16: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   18 |     if(j != P) printf(" ");
      |                ^~~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'printf'
  +++ |+#include <stdio.h>
    1 |  void sw(int *x, int *y){
main.c:18:16: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   18 |     if(j != P) printf(" ");
      |                ^~~~~~
main.c:18:16: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:19:18: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   19 |     if(j == i+1) printf("[%d]", arr[j]);
      |                  ^~~~~~
main.c:19:18: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:20:10: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   20 |     else printf("%d", arr[j]);
      |          ^~~~~~
main.c:20:10: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:22:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   22 |   printf("\n");
      |   ^~~~~~
main.c:22:3: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c: In function 'main':
main.c:27:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
   27 |   scanf("%d", &n);
      |   ^~~~~
main.c:27:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:27:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
main.c:27:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:28:37: error: 'arr' undeclared (first use in this function)
   28 |   for(i = 0;i < n;i++) scanf("%d", &arr[i]);
      |                                     ^~~
Language: C

#include<stdio.h>
int P(*int,int,int)

main(void){
  int n,i,A[100000],p;
  scanf("%d",&n);
  for(i=0;i<n;i++)
    scanf("%d",&A[i]);
  p=Partition(&A[0],0,n-1);
  printf("%d",A[0]);
  for(i=1;i<n;i++)
    if(i==p){
      printf(" [%d]",A[i]);
  }
    else printf(" %d",A[i]);
  printf("\n");
  return 0;
}
int Partition(int *A,int p,int q){
  int i,x,j,temp;
  x = A[q];
   
  i = p-1;
  for(j = p;j <= q-1;j++){
    if(A[j] <= x){
      i = i + 1;
      temp=A[i];
      A[i]=A[j];
      A[j]=temp;
    }
  } 
  temp=A[i+1];
  A[i+1]=A[r];
  A[r]=temp;
  return i+1;
}

Compiler output:
main.c:2:7: error: expected declaration specifiers or '...' before '*' token
    2 | int P(*int,int,int)
      |       ^
main.c: In function 'Partition':
main.c:33:12: error: 'r' undeclared (first use in this function)
   33 |   A[i+1]=A[r];
      |            ^
main.c:33:12: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include<stdio.h>
int P(int*,int,int)

main(void){
  int n,i,A[100000],p;
  scanf("%d",&n);
  for(i=0;i<n;i++)
    scanf("%d",&A[i]);
  p=Partition(&A[0],0,n-1);
  printf("%d",A[0]);
  for(i=1;i<n;i++)
    if(i==p){
      printf(" [%d]",A[i]);
  }
    else printf(" %d",A[i]);
  printf("\n");
  return 0;
}
int Partition(int *A,int p,int q){
  int i,x,j,temp;
  x = A[q];
   
  i = p-1;
  for(j = p;j <= q-1;j++){
    if(A[j] <= x){
      i = i + 1;
      temp=A[i];
      A[i]=A[j];
      A[j]=temp;
    }
  } 
  temp=A[i+1];
  A[i+1]=A[r];
  A[r]=temp;
  return i+1;
}

Compiler output:
main.c: In function 'P':
main.c:4:1: error: expected declaration specifiers before 'main'
    4 | main(void){
      | ^~~~
main.c:19:34: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
   19 | int Partition(int *A,int p,int q){
      |                                  ^
main.c:37: error: expected '{' at end of input
Language: C

#include<stdio.h>
int P(int*,int,int)

int main(void){
  int n,i,A[100000],p;
  scanf("%d",&n);
  for(i=0;i<n;i++)
    scanf("%d",&A[i]);
  p=Partition(&A[0],0,n-1);
  printf("%d",A[0]);
  for(i=1;i<n;i++)
    if(i==p){
      printf(" [%d]",A[i]);
  }
    else printf(" %d",A[i]);
  printf("\n");
  return 0;
}
int Partition(int *A,int p,int q){
  int i,x,j,temp;
  x = A[q];
   
  i = p-1;
  for(j = p;j <= q-1;j++){
    if(A[j] <= x){
      i = i + 1;
      temp=A[i];
      A[i]=A[j];
      A[j]=temp;
    }
  } 
  temp=A[i+1];
  A[i+1]=A[r];
  A[r]=temp;
  return i+1;
}

Compiler output:
main.c: In function 'P':
main.c:4:15: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
    4 | int main(void){
      |               ^
main.c:19:34: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
   19 | int Partition(int *A,int p,int q){
      |                                  ^
main.c:37: error: expected '{' at end of input
Language: C

#include<stdio.h>
int P(int*,int,int);

int main(void){
  int n,i,A[100000],p;
  scanf("%d",&n);
  for(i=0;i<n;i++)
    scanf("%d",&A[i]);
  p=Partition(&A[0],0,n-1);
  printf("%d",A[0]);
  for(i=1;i<n;i++)
    if(i==p){
      printf(" [%d]",A[i]);
  }
    else printf(" %d",A[i]);
  printf("\n");
  return 0;
}
int Partition(int *A,int p,int q){
  int i,x,j,temp;
  x = A[q];
   
  i = p-1;
  for(j = p;j <= q-1;j++){
    if(A[j] <= x){
      i = i + 1;
      temp=A[i];
      A[i]=A[j];
      A[j]=temp;
    }
  } 
  temp=A[i+1];
  A[i+1]=A[r];
  A[r]=temp;
  return i+1;
}

Compiler output:
main.c: In function 'main':
main.c:9:5: error: implicit declaration of function 'Partition' [-Wimplicit-function-declaration]
    9 |   p=Partition(&A[0],0,n-1);
      |     ^~~~~~~~~
main.c: In function 'Partition':
main.c:33:12: error: 'r' undeclared (first use in this function)
   33 |   A[i+1]=A[r];
      |            ^
main.c:33:12: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include<stdio.h>
int P(*int,int,int);

int main(void){
  int n,i,A[100000],p;
  scanf("%d",&n);
  for(i=0;i<n;i++)
    scanf("%d",&A[i]);
  p=Partition(&A[0],0,n-1);
  printf("%d",A[0]);
  for(i=1;i<n;i++)
    if(i==p){
      printf(" [%d]",A[i]);
  }
    else printf(" %d",A[i]);
  printf("\n");
  return 0;
}
int Partition(int *A,int p,int q){
  int i,x,j,temp;
  x = A[q];
   
  i = p-1;
  for(j = p;j <= q-1;j++){
    if(A[j] <= x){
      i = i + 1;
      temp=A[i];
      A[i]=A[j];
      A[j]=temp;
    }
  } 
  temp=A[i+1];
  A[i+1]=A[r];
  A[r]=temp;
  return i+1;
}

Compiler output:
main.c:2:7: error: expected declaration specifiers or '...' before '*' token
    2 | int P(*int,int,int);
      |       ^
main.c: In function 'main':
main.c:9:5: error: implicit declaration of function 'Partition' [-Wimplicit-function-declaration]
    9 |   p=Partition(&A[0],0,n-1);
      |     ^~~~~~~~~
main.c: In function 'Partition':
main.c:33:12: error: 'r' undeclared (first use in this function)
   33 |   A[i+1]=A[r];
      |            ^
main.c:33:12: note: each undeclared identifier is reported only once for each function it appears in
Language: C

include <stdio.h>
#define N 100000
int A[N];

int Partition(int,int);

int main()
{
  int n,x,i;
  scanf("%d",&n);
  for(i=1;i<=n;i++)
    {
      scanf("%d",&A[i]);
      //配列
    }
  x=Partition(1,n);
  for(i=1;i<=n;i++)
    {
      if(i==x)
        {
          printf("[%d]",A[i]);
        }
      else
        {
          printf("%d",A[i]);
        }
      if(i<n)
        {
          printf(" ");
        }
    }
  printf("\n");
  return 0;
}





int Partition( int p, int r ){
int x,change;
int i,j;
x=A[r];
j=p-1;

for(j=p;j<r;j++){
if(A[j]<=x)//配列の値がｘ以下の時にソートが実行
{
j++;
change=A[i];
A[i]=A[j];
A[j]=change;
}
}

change=A[i+1];
A[i+1]=A[r];
A[r]=change;
return i+1;
}

Compiler output:
main.c:1:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include <stdio.h>
      |         ^
main.c: In function 'main':
main.c:10:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
   10 |   scanf("%d",&n);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | include <stdio.h>
main.c:10:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
   10 |   scanf("%d",&n);
      |   ^~~~~
main.c:10:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:13:19: error: 'A' undeclared (first use in this function)
   13 |       scanf("%d",&A[i]);
      |                   ^
main.c:13:19: note: each undeclared identifier is reported only once for each function it appears in
main.c:21:11: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   21 |           printf("[%d]",A[i]);
      |           ^~~~~~
main.c:21:11: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:21:11: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:21:11: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:25:11: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   25 |           printf("%d",A[i]);
      |           ^~~~~~
main.c:25:11: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:29:11: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   29 |           printf(" ");
      |           ^~~~~~
main.c:29:11: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:32:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   32 |   printf("\n");
      |   ^~~~~~
main.c:32:3: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c: In function 'Partition':
main.c:43:3: error: 'A' undeclared (first use in this function)
   43 | x=A[r];
      |   ^
Language: C

include <stdio.h>
#define N 100000
int A[N];

int Partition( int p, int r ){
int x,change;
int i,j;
x=A[r];
j=p-1;

for(j=p;j<r;j++){
if(A[j]<=x)//配列の値がｘ以下の時にソートが実行
{
j++;
change=A[i];
A[i]=A[j];
A[j]=change;
}
}

change=A[i+1];
A[i+1]=A[r];
A[r]=change;
return i+1;
}

int main()
{
  int n,x,i;
  scanf("%d",&n);
  for(i=1;i<=n;i++)
    {
      scanf("%d",&A[i]);
      //配列
    }
  x=Partition(1,n);
  for(i=1;i<=n;i++)
    {
      if(i==x)
        {
          printf("[%d]",A[i]);
        }
      else
        {
          printf("%d",A[i]);
        }
      if(i<n)
        {
          printf(" ");
        }
    }
  printf("\n");
  return 0;
}

Compiler output:
main.c:1:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include <stdio.h>
      |         ^
main.c: In function 'Partition':
main.c:8:3: error: 'A' undeclared (first use in this function)
    8 | x=A[r];
      |   ^
main.c:8:3: note: each undeclared identifier is reported only once for each function it appears in
main.c: In function 'main':
main.c:30:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
   30 |   scanf("%d",&n);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | include <stdio.h>
main.c:30:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
   30 |   scanf("%d",&n);
      |   ^~~~~
main.c:30:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:33:19: error: 'A' undeclared (first use in this function)
   33 |       scanf("%d",&A[i]);
      |                   ^
main.c:41:11: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   41 |           printf("[%d]",A[i]);
      |           ^~~~~~
main.c:41:11: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:41:11: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:41:11: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:45:11: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   45 |           printf("%d",A[i]);
      |           ^~~~~~
main.c:45:11: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:49:11: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   49 |           printf(" ");
      |           ^~~~~~
main.c:49:11: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:52:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   52 |   printf("\n");
      |   ^~~~~~
main.c:52:3: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

#include <stdio.h>
#define N 100000
int A[N];
 
int Partition( int p, int r ){
  int x,change;
  int i,j;
  x=A[r];
  j=p-1;

  for(j=p;j<r;j++){
    if(A[j]<=x)
      }
	j++;
	change=A[i];
	A[i]=A[j];
	A[j]=change;
      }
  }

  change=A[i+1];
  A[i+1]=A[r];
  A[r]=change;
  return i+1;
}



int main()
{
  int n,x,i;
  scanf("%d",&n);
  for(i=1;i<=n;i++)
    {
      scanf("%d",&A[i]);
      //配列
    }
  x=Partition(1,n);
  for(i=1;i<=n;i++)
    {
      if(i==x)
	{
	  printf("[%d]",A[i]);  
	}
      else
	{
	  printf("%d",A[i]);
	}
      if(i<n)
	{
	  printf(" ");
	}
    }
  printf("\n");
  return 0;
}

Compiler output:
main.c: In function 'Partition':
main.c:13:7: error: expected expression before '}' token
   13 |       }
      |       ^
main.c: At top level:
main.c:19:3: error: expected identifier or '(' before '}' token
   19 |   }
      |   ^
main.c:21:3: warning: data definition has no type or storage class
   21 |   change=A[i+1];
      |   ^~~~~~
main.c:21:3: error: type defaults to 'int' in declaration of 'change' [-Wimplicit-int]
main.c:21:12: error: 'i' undeclared here (not in a function)
   21 |   change=A[i+1];
      |            ^
main.c:22:3: warning: data definition has no type or storage class
   22 |   A[i+1]=A[r];
      |   ^
main.c:22:3: error: type defaults to 'int' in declaration of 'A' [-Wimplicit-int]
main.c:22:12: error: 'r' undeclared here (not in a function)
   22 |   A[i+1]=A[r];
      |            ^
main.c:23:3: warning: data definition has no type or storage class
   23 |   A[r]=change;
      |   ^
main.c:23:3: error: type defaults to 'int' in declaration of 'A' [-Wimplicit-int]
main.c:24:3: error: expected identifier or '(' before 'return'
   24 |   return i+1;
      |   ^~~~~~
main.c:25:1: error: expected identifier or '(' before '}' token
   25 | }
      | ^
Language: C

#include<stdio.h>
#define N 20000000

int A[N];

int partition(int,int);

main(){
  int k,r,mid;
  int i;

  scanf("%d",&k);

  for(i=0; i<k; i++){

    scanf("%d",&A[i]);

  }

  r = k-1;

  mid = partition(0,r);

  for(i=0; i<mid; i++){

    printf("%d ",A[i]);

  }
  printf("[%d] ",A[mid]);

  printf("\n");

  return 0;

}


int partition(int p,int r){

int i=0,j,e=0;


for(j=p; j<r; j++){
  if(A[j] <= A[r]){
    
    ex = A[i];
    A[i] = A[j];
    A[j] = ex;
    i++;
  } 
 }

ex = A[r];
A[r] = A[i];
A[i] = ex;

return i;
}

Compiler output:
main.c:8:1: error: return type defaults to 'int' [-Wimplicit-int]
    8 | main(){
      | ^~~~
main.c: In function 'partition':
main.c:46:5: error: 'ex' undeclared (first use in this function); did you mean 'e'?
   46 |     ex = A[i];
      |     ^~
      |     e
main.c:46:5: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include <iostream>
using namespace std;

void Swap(int *a,int *b) {
  int temp=*a;
  *a=*b;
  *b=tmep;
}
int main() {
  std::ios::sync_with_stdio(false);
  cout.tie(0);
  cin.tie(0);
  int n;
  cin>>n;
  int A[n],r=n-1;
  for (int i=0; i<n; i++) {
    cin>>A[i];
  }
  int x=A[n-1],i=(-1);
  for (int j=0; j<r; j++) {
    if (A[j]<=x) {
      i++;
      Swap(&A[i],&A[j]);
    }
  }
  Swap(&A[i+1],&A[r]);
  int t=i+1;
  for (int k=0; k<n; k++) {
    if (k) {
      cout<<" "<<flush;
    }
    if (k==t) {
      cout<<"["<<flush;
    }
    cout<<A[k]<<flush;
    if (k==t) {
      cout<<"]"<<flush;
    }
  }
  cout<<endl;
  return 0;
}



Compiler output:
a.cc: In function 'void Swap(int*, int*)':
a.cc:7:6: error: 'tmep' was not declared in this scope; did you mean 'temp'?
    7 |   *b=tmep;
      |      ^~~~
      |      temp
Language: C++

#include <stdio.h>
#include <algorithm>

using namespace std;

int partition(int A[],int p,int r){
	int x = A[r];
	int i = p-1;
	for(int j = p; j < r; j++){
		if(A[j] <= x){
			i++;
			swap(A[i],A[j]);
		}
	}
	swap(A[i+1],A[r]);
	return i+1;
}

int main(){
	int n,partition_point;
	scanf("%d",&n);
	int A[n];
	for(int i = 0; i < n; i++) scanf("%d",&A[i]);

	partition_point = partition(A,0,n-1);

	for(int i = 0; i < n-1; i++){
		if(i == partition_point){
			printf("[%d] ",A[i]);
		}else{
			printf("%d ",A[i]);
		}
	}
	if(partition_point == n-1){
		printf("[%d]\n",A[n-1]);
	}else{
		printf("%d\n",A[n-1]);
	}



Compiler output:
a.cc: In function 'int main()':
a.cc:38:10: error: expected '}' at end of input
   38 |         }
      |          ^
a.cc:19:11: note: to match this '{'
   19 | int main(){
      |           ^
Language: C++

#include <stdio.h>

struct elem{
    unsigned int i;
    double v;
};

int partition(
        struct elem* ary,
        int p, int r)
{
    int i =0;
    int j = 0;
    struct elem x, buf;
    x = ary[r];
    i = p;
    for (j = p; j < r; j++) {
        if (ary[j].v <= x.v) {
            buf = ary[j];
            ary[j] = ary[i];
            ary[i] = buf;
            i++;
        }
    }
    buf = x;
    ary[r] = ary[i];
    ary[i] = buf;
    return i;
}

void quick_arg_sort(
        const double *ary,
        int *sorted_index) {
}


struct elem A[100100];
void main() {
    int i, n, k;
    scanf("%d", &n);
    for (i = 0; i < n; i++) {
        scanf("%d", &((A+i)->v));
    }
    k = partition(A, 0, n-1);
    for (i = 0; i < n; i++) {
        if (i) {
            printf(" ");
        }
        if (i == k) {
            printf("[");
        }
        printf("%d", A[i].v);
        if (i == k) {
            printf("]");
        }
    }
    return;
}


Compiler output:
a.cc:38:1: error: '::main' must return 'int'
   38 | void main() {
      | ^~~~
a.cc: In function 'int main()':
a.cc:57:5: error: return-statement with no value, in function returning 'int' [-fpermissive]
   57 |     return;
      |     ^~~~~~
Language: C++

def partition(A, p, r):
    x = A[r]
    i = p - 1
    for j in range(p, r+1):
        if A[j] <= x:
            i = i + 1
            A[i], A[j] = A[j], A[i]

    return i


n = int(input())
A = [int(x) for x in input().split()]

p = partition(A, 0, n-1)

for i in range(n):
    if i:
        print(" ", end = "")
    if i == p:
        print("[", end="")
    print(A[i], end="")
    if i == p:
        print("]", end="")
print()

    



Compiler output:
a.cc:1:1: error: 'def' does not name a type
    1 | def partition(A, p, r):
      | ^~~
Language: C++

#include "iostream"
#include <algorithm>

using namespace std;

int partition(int A[],int p,int r){
  int x = A[r];
  int i = p - 1;
  for(int j = p ; j < r - 1; j++){
    if(A[j] <= x){
      i=i +1;
      swap(A[i],A[j]);
    }
  }
  swap(A[i+1],A[j]);
  return i + 1;
}

int main(){
  int n,m;
  int A[1000000];
  cin >> n;
  for(int i = 0; i<n;i++) cin >> A[i];
  m = partition(A,0,n-1);
  for(int i = 0 ; i < n; i++){
    if(i) cout << " ";
    if(i == m) cout << "[";
    cout << A[i];
      if(i == m) cout << "]";
  }
  cout << endl;
  return 0;
}



Compiler output:
a.cc: In function 'int partition(int*, int, int)':
a.cc:15:17: error: 'j' was not declared in this scope
   15 |   swap(A[i+1],A[j]);
      |                 ^
Language: C++

#include<stdio.h>
#define MAX 100000

int A[MAX], n;

int partition(int p, int r){
    int x, i, j, t;
    x = A[r];
    i = p - 1;
    for( j = p; j < r; ++j){
       if(A[j] <= x ) {
          ++i;
          t = A[i]; A[i] = A[j]; A[j] = t;
       }
    }
    t = A[i + 1]; A[i + 1] = A[r]; A[r] = t;
    return i + 1;
}

int main(void){
    int i, q;

    cin >> n;
    rep(i,n) cin >> A[i];

    q = partition(0, n - 1);

    rep(i,n){
        if( i ) cout << " ";
        if( i == q ) cout << "[";
        cout << A[i];
        if ( i == q ) cout << "]";
    }
    cout << endl;

    
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:5: error: 'cin' was not declared in this scope
   23 |     cin >> n;
      |     ^~~
a.cc:24:5: error: 'rep' was not declared in this scope
   24 |     rep(i,n) cin >> A[i];
      |     ^~~
a.cc:34:5: error: 'cout' was not declared in this scope
   34 |     cout << endl;
      |     ^~~~
a.cc:34:13: error: 'endl' was not declared in this scope
   34 |     cout << endl;
      |             ^~~~
Language: C++

#include<iostream>
using namespace std;
#define MAX 100000

int A[MAX], n;

int partition(A[], p, r){
  int x = A[r];
  int i = p - 1;
  for(int j = p; j < r; j++){
    if(A[j] <= x){
      i++;
      swap(A[i], A[j]);
    }
  }
  swap(A[i + 1], A[r]);
  return i + 1;
}

int main(){
  int i, q;

  cin >> n;
  for(i = 0; i < n; i++)
    cin >> A[i];
  q = partition(0, n - 1);

  for(i = 0; i < n; i++){
    if(i)
      cout << " ";
    if(i == q)
      cout << "[";
    cout << A[i];
    if(i == q)
      cout << "]";
  }
  cout << endl;

  return 0;
}

Compiler output:
a.cc:7:17: error: expected primary-expression before ']' token
    7 | int partition(A[], p, r){
      |                 ^
a.cc:7:20: error: 'p' was not declared in this scope
    7 | int partition(A[], p, r){
      |                    ^
a.cc:7:23: error: 'r' was not declared in this scope
    7 | int partition(A[], p, r){
      |                       ^
a.cc:7:24: error: expression list treated as compound expression in initializer [-fpermissive]
    7 | int partition(A[], p, r){
      |                        ^
a.cc: In function 'int main()':
a.cc:26:16: error: 'partition' cannot be used as a function
   26 |   q = partition(0, n - 1);
      |       ~~~~~~~~~^~~~~~~~~~
Language: C++

#include<iostream>
using namespace std;

int partition(int A[], int p, int r) {
    int x, i, j;
    x = A[r];
    i = p-1;
    for (j = p; j < r; j++) {
	if (A[j] <= x) {
	    i++;
	    swap(A[i], A[j]);
	}
    }
    swap(A[i+1], A[r]);
    return i+1;
}

int main() {

    int n, i, res;
    cin >> n;
    int A[n];
    for (i = 0; i < n; i++) {
	cin >> A[i];
    }
    
    res = partition(A, 0, n-1);
    
    for (i = 0; i < res; i++) {
	cout << A[i] << " ";
    }
    cout << "[" << A[res] << "]" << " ";
    12
13 19 9 5 12 8 7 4 21 2 6 11

    for (i = res+1; i < n; i++) {
	if (i > res) cout << " ";
	cout << A[i];
    }
    cout << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:33:7: error: expected ';' before numeric constant
   33 |     12
      |       ^
      |       ;
   34 | 13 19 9 5 12 8 7 4 21 2 6 11
      | ~~     
a.cc:36:31: error: expected ';' before ')' token
   36 |     for (i = res+1; i < n; i++) {
      |                               ^
      |                               ;
Language: C++

#include<iostream>
using namespace std;

int x[1000000], n;

int func(int p, int r) {
	int p, a, b, j;
	p = x[r];
	j = p - 1;
	for (int i = p; i < r; i++) {
		if (x[i] <= p) {
			j = j + 1;
			a = x[i];
			b = x[j];
			x[i] = b;
			x[j] = a;
		}
		a = x[i + 1];
		b = x[r];
		x[i + 1] = b;
		x[r] = a;
	}
	return j + 1;
}

int main() {
	int c;
	cin >> n;
	for (int k = 0; k < n; k++) {
		cin >> x[k];
	}
	c = func(0, n - 1);
	for (int k = 0; k < n; k++) {
		if (n) {
			cout << ' ';
		}
		if (k == c) {
			cout << '[';
		}
		cout << x[k];
		if (k == c) {
			cout << ']';
		}
	}
	cout << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int func(int, int)':
a.cc:7:13: error: declaration of 'int p' shadows a parameter
    7 |         int p, a, b, j;
      |             ^
a.cc:6:14: note: 'int p' previously declared here
    6 | int func(int p, int r) {
      |          ~~~~^
Language: C++

ns = STDIN.lines.split[1..-1].map!(&to_i)
p = ns[-1]
ns = ns[0..-2]

a = []
b = []
ns.each do |d|
  if d <= p
a << d
else
b << d
end
end

ret = a + ["{#{p}}"] + b
puts a.join(' ') 

Compiler output:
a.cc:1:24: error: too many decimal points in number
    1 | ns = STDIN.lines.split[1..-1].map!(&to_i)
      |                        ^~~
a.cc:3:9: error: too many decimal points in number
    3 | ns = ns[0..-2]
      |         ^~~
a.cc:1:1: error: 'ns' does not name a type
    1 | ns = STDIN.lines.split[1..-1].map!(&to_i)
      | ^~
Language: C++

import scala.annotation.tailrec

object Main {
  def main(args: Array[String]): Unit = {
    val (n, s) = (io.StdIn.readLine().toInt, io.StdIn.readLine().split(' ').map(_.toInt).toStream)

    @tailrec
    def partition(r: Int, list: Stream[Int], acc: (Stream[Int], Stream[Int]) = (Stream(), Stream())): (Stream[Int], Stream[Int]) = list match {
      case Stream() => acc
      case x #:: list if x < r => partition(r, list, (x #:: acc._1, acc._2))
      case x #:: list if x >= r => partition(r, list, (acc._1, x #:: acc._2))
    }
    val (last, list) = (s.last, s.init)
    val (smaller, larger) = partition(last, list)
    println(s"${smaller.mkString(" ")} [${last}] ${larger.mkString(" ")}")
  }
}

Compiler output:
a.cc:7:5: error: stray '@' in program
    7 |     @tailrec
      |     ^
a.cc:10:14: error: stray '#' in program
   10 |       case x #:: list if x < r => partition(r, list, (x #:: acc._1, acc._2))
      |              ^
a.cc:10:57: error: stray '#' in program
   10 |       case x #:: list if x < r => partition(r, list, (x #:: acc._1, acc._2))
      |                                                         ^
a.cc:11:14: error: stray '#' in program
   11 |       case x #:: list if x >= r => partition(r, list, (acc._1, x #:: acc._2))
      |              ^
a.cc:11:66: error: stray '#' in program
   11 |       case x #:: list if x >= r => partition(r, list, (acc._1, x #:: acc._2))
      |                                                                  ^
a.cc:1:1: error: 'import' does not name a type
    1 | import scala.annotation.tailrec
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++


#include <stdio.h>
#define MAX 100000
 
int A[MAX];
int partition();
 
 
int main(){

  int i;
  int n,q;
 
  scanf("%d",&n);

  for( i=0 ; i < n ; i++ ){

    scanf("%d",&A[i]);

  }

  q = partition( 0 , n-1 );
 
  for( i = 0; i < n; i++ ){

    if(i == q) printf("[");
 
      printf( "%d", A[i]);
 
      if(i == q) printf("]");
 
      if(i != n-1) printf(" ");
  }
  printf("\n");
 
  return 0;
}
 
int partition(int p,int r)
{
  int i,j;
  int x;
  int s;
 
  x = A[r];
  i = p-1;

  for(j = p; j < r; j++){

    if(A[j]<= x){

      i++;
      s = A[i];
      A[i] = A[j];
      A[j] = s;
    }
  }
      s = A[i+1];
      A[i+1] = A[r];
      A[r] = s;
  
    return i+1;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:22:16: error: too many arguments to function 'int partition()'
   22 |   q = partition( 0 , n-1 );
      |       ~~~~~~~~~^~~~~~~~~~~
a.cc:6:5: note: declared here
    6 | int partition();
      |     ^~~~~~~~~
Language: C++

#include <iostream>
#include <algorithm>
using namespace std;
int n, a[111111];
int main() {
	scanf("%d", &n);
	for(int i = 0; i < n; i++) scanf("%d", &a[i]);
	int x = a[n - 1], z = -1;
	for(int i = 0; i < n; i++) {
		if(a[i] <= x) {
			swap(a[++z], a[i]);
		}
	}
	swap(a[++z], a[n - 1]);
	for(int i = 0; i < n; i++) {
		printf(i == z ? "[%d]" : "%d", a[i]);
		printf(i + 1 == n ? "\n", " ");
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:46: error: expected ':' before ')' token
   17 |                 printf(i + 1 == n ? "\n", " ");
      |                                              ^
      |                                              :
a.cc:17:46: error: expected primary-expression before ')' token
Language: C++

#include <iostream>
#include <vector>
using namespace std;

void swap(vector<int> &a, int i, int j) {
    int tmp = a[i];
    a[i] = a[j];
    a[j] = tmp;
}

int partition(vector<int> &a) {
    int pivot = a[0];
    int insertion_place = 0;
    for (int i=1; i<a.size(); i++) {
        if ( pivot > a[i] ) {
            swap(a, i, insertion_place);
            insertion_place++;
        }
    }
    return insertion_place;
}

int main() {
    int n;
    cin >> n;
    vector<int> a(n);
    for (int i=0; i<n; i++) cin >> a[i];
    
    int q = partition(a);
    
    for (int i=0; i<n-1; i++) {
        if ( i == q ) {
            cout << "[" << a[i] << "]" << " "l;
        } else {
            cout << a[i] << " ";
        }
    }
    if ( n-1 == q ) {
        cout << "[" << a[n-1] << "]" << endl;
    } else {
        cout << a[n-1] << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:33:43: error: unable to find string literal operator 'operator""l' with 'const char [2]', 'long unsigned int' arguments
   33 |             cout << "[" << a[i] << "]" << " "l;
      |                                           ^~~~
Language: C++

#include <vector>
#include <iostream>
#include <algorithm>
#include <limits>
#include <string>
#include <stack>
#include <queue>

#define INT_MAX 2147483647
#define INT_MIN -2147483647
using namespace std;

int partition(vector<int> &vec, int l, int r)
{
	if (vec.empty()) return -1;

	int len = vec.size();
	int tmp = vec[len - 1];

	int pre = l;
	for (int idx = l; idx <= r; ++idx)
	{
		if (vec[idx] <= tmp)
			swap(vec[idx], vec[pre++]);
	}
	vec[pre - 1] = tmp;
	return pre - 1;
}

void main()
{
	vector<int> data;
	int v;
	cin >> v;
	while (cin >> v)
		data.push_back(v);

	int len = data.size();
	int pos = partition(data, 0, len - 1);
	if (pos >= 0)
	{
		for (int i = 0; i < pos; ++i) cout << data[i] << " ";
		cout << "[" << data[pos] << "] ";
		for (int i = pos+1; i < len - 1; ++i) cout << data[i] << " ";
		if (pos != len - 1) cout << data[len - 1];
	}
}

Compiler output:
a.cc:30:1: error: '::main' must return 'int'
   30 | void main()
      | ^~~~
Language: C++

#include <iostream>
#include <cstdio>
using namespace std;

int A[100000], n;

int Partition(int p, int r){
	int x = A[r - 1], j = 0;
	for(int i = 0;i < n;i++){
		if(A[i] <= x) int tmp = A[j], A[j++] = A[i], A[i] = tmp;
	}
	return j - 1;
}

main(){
    scanf("%d", &n);
    for(int i = 0;i < n;i++)scanf("%d", &A[i]);
	int j = Partition(0, n);
	for(int i = 0;i < n - 1;i++){
		if(i)printf(" ");
		if(i == j)printf("[");
		printf("%d", A[i]);
		if(i == j)printf("]");
	}
	printf(" %d\n", A[n - 1]);
}

Compiler output:
a.cc: In function 'int Partition(int, int)':
a.cc:10:59: error: array must be initialized with a brace-enclosed initializer
   10 |                 if(A[i] <= x) int tmp = A[j], A[j++] = A[i], A[i] = tmp;
      |                                                        ~~~^
a.cc:10:62: error: conflicting declaration 'int A [i]'
   10 |                 if(A[i] <= x) int tmp = A[j], A[j++] = A[i], A[i] = tmp;
      |                                                              ^
a.cc:10:47: note: previous declaration as 'int A [<anonymous>]'
   10 |                 if(A[i] <= x) int tmp = A[j], A[j++] = A[i], A[i] = tmp;
      |                                               ^
a.cc: At global scope:
a.cc:15:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   15 | main(){
      | ^~~~
Language: C++

#include <iostream>
#include <cstdio>
using namespace std;

int A[100000], n;

int Partition(int p, int r){
	int x = A[r - 1], j = 0;
	for(int i = 0;i < n;i++){
		if(A[i] <= x) {
			int tmp = A[j], A[j++] = A[i], A[i] = tmp;
		}
	}
	return j - 1;
}

main(){
    scanf("%d", &n);
    for(int i = 0;i < n;i++)scanf("%d", &A[i]);
	int j = Partition(0, n);
	for(int i = 0;i < n - 1;i++){
		if(i)printf(" ");
		if(i == j)printf("[");
		printf("%d", A[i]);
		if(i == j)printf("]");
	}
	printf(" %d\n", A[n - 1]);
}

Compiler output:
a.cc: In function 'int Partition(int, int)':
a.cc:11:53: error: array must be initialized with a brace-enclosed initializer
   11 |                         int tmp = A[j], A[j++] = A[i], A[i] = tmp;
      |                                                  ~~~^
a.cc:11:56: error: conflicting declaration 'int A [i]'
   11 |                         int tmp = A[j], A[j++] = A[i], A[i] = tmp;
      |                                                        ^
a.cc:11:41: note: previous declaration as 'int A [<anonymous>]'
   11 |                         int tmp = A[j], A[j++] = A[i], A[i] = tmp;
      |                                         ^
a.cc: At global scope:
a.cc:17:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   17 | main(){
      | ^~~~
Language: C++

int partition(int[] A,int p,int r){
  
  int x = A[r];
  int i= p-1;
  for(int j=p;j<r-1;i++){
    if(A[j] <= x){
       i = i+1;
       swap(A[i],A[j]);
     }
  }
  swap(A[i+1],A[r]);

  return i+1;
}

Compiler output:
a.cc:1:21: error: expected ',' or '...' before 'A'
    1 | int partition(int[] A,int p,int r){
      |                     ^
a.cc: In function 'int partition(int*)':
a.cc:3:11: error: 'A' was not declared in this scope
    3 |   int x = A[r];
      |           ^
a.cc:3:13: error: 'r' was not declared in this scope
    3 |   int x = A[r];
      |             ^
a.cc:4:10: error: 'p' was not declared in this scope
    4 |   int i= p-1;
      |          ^
a.cc:8:8: error: 'swap' was not declared in this scope
    8 |        swap(A[i],A[j]);
      |        ^~~~
a.cc:11:3: error: 'swap' was not declared in this scope
   11 |   swap(A[i+1],A[r]);
      |   ^~~~
Language: C++

#include<iostream>
using namespace std;

int partition(int A[],int p,int r){
  
  int x = A[r];
  int i= p-1;
  for(int j=p;j<r-1;i++){
    if(A[j] <= x){
       i = i+1;
       swap(A[i],A[j]);
     }
  }
  swap(A[i+1],A[r]);

  return i+1;
}

int main(){
  int num=0;
  cin >> num;
  int array[num];
  int* point=array;
  while(cin >> *point){
    point++;
  }
  int index = partition(array,0,num);
  for(int i=0;i<num;i++){
    if(i==index)
       cout << "[" + array[i] + "] ";
    else{
       cout << array[i];
    }
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:30:31: error: invalid operands of types 'const char*' and 'const char [3]' to binary 'operator+'
   30 |        cout << "[" + array[i] + "] ";
      |                ~~~~~~~~~~~~~~ ^ ~~~~
      |                    |            |
      |                    const char*  const char [3]
Language: C++

#include <iostream>
using namespace std;

void QuickSort(int A[], int p, int r){  //S:?????? B:?§???? T:??????
  int x = A[r];
  int i = p-1;
  for(int j=p;j<r,j++){
    if(A[j]<=x){
      i=i+1;
      int num1=A[i];
      A[i]=A[j];
      A[j]=num;
    }
  }
  int num2=A[i+1];
  A[i+1]=A[r];
  A[r]=num2;

  int q = i+1;

  for(int k=0;k<r,k++){
    if(A[k] != q){
      cout<<A[k]<<" ";
    }else if(A[K] = q){
      cout<<"["<<A[k]<<"]"<<" ";
    }
  }

  cout<<endl;

  return i+1;
}

int main{
  int length;
  int array[length];
  cin>>length;
  for(int i = 0;i<length,i++){
    cin>>array[i];
  }

  QuickSort(array[],array[0],array[length]);

  return 0;
}

Compiler output:
a.cc: In function 'void QuickSort(int*, int, int)':
a.cc:7:22: error: expected ';' before ')' token
    7 |   for(int j=p;j<r,j++){
      |                      ^
      |                      ;
a.cc:12:12: error: 'num' was not declared in this scope; did you mean 'num1'?
   12 |       A[j]=num;
      |            ^~~
      |            num1
a.cc:21:22: error: expected ';' before ')' token
   21 |   for(int k=0;k<r,k++){
      |                      ^
      |                      ;
a.cc:24:16: error: 'K' was not declared in this scope
   24 |     }else if(A[K] = q){
      |                ^
a.cc:31:11: error: return-statement with a value, in function returning 'void' [-fpermissive]
   31 |   return i+1;
      |          ~^~
a.cc: At global scope:
a.cc:34:5: error: cannot declare '::main' to be a global variable
   34 | int main{
      |     ^~~~
a.cc:35:3: error: expected primary-expression before 'int'
   35 |   int length;
      |   ^~~
a.cc:35:3: error: expected '}' before 'int'
a.cc:34:9: note: to match this '{'
   34 | int main{
      |         ^
a.cc:36:13: error: 'length' was not declared in this scope
   36 |   int array[length];
      |             ^~~~~~
a.cc:37:3: error: 'cin' does not name a type
   37 |   cin>>length;
      |   ^~~
a.cc:38:3: error: expected unqualified-id before 'for'
   38 |   for(int i = 0;i<length,i++){
      |   ^~~
a.cc:38:17: error: 'i' does not name a type
   38 |   for(int i = 0;i<length,i++){
      |                 ^
a.cc:42:19: error: creating array of template placeholder type 'array<...auto...>'
   42 |   QuickSort(array[],array[0],array[length]);
      |                   ^
a.cc:42:28: error: creating array of template placeholder type 'array<...auto...>'
   42 |   QuickSort(array[],array[0],array[length]);
      |                            ^
a.cc:42:36: error: 'length' was not declared in this scope
   42 |   QuickSort(array[],array[0],array[length]);
      |                                    ^~~~~~
a.cc:42:44: error: expected constructor, destructor, or type conversion before ';' token
   42 |   QuickSort(array[],array[0],array[length]);
      |                                            ^
a.cc:44:3: error: expected unqualified-id before 'return'
   44 |   return 0;
      |   ^~~~~~
a.cc:45:1: error: expected declaration before '}' token
   45 | }
      | ^
Language: C++

#include <iostream>
using namespace std;

void QuickSort(int A[], int p, int r){  //S:?????? B:?§???? T:??????
  int x = A[r];
  int i = p-1;
  for(int j=p;j<r;j++){
    if(A[j]<=x){
      i=i+1;
      int num1=A[i];
      A[i]=A[j];
      A[j]=num;
    }
  }
  int num2=A[i+1];
  A[i+1]=A[r];
  A[r]=num2;

  int q = i+1;

  for(int k=0;k<r;k++;){
    if(A[k] != q){
      cout<<A[k]<<" ";
    }else if(A[K] = q){
      cout<<"["<<A[k]<<"]"<<" ";
    }
  }

  cout<<endl;

  return i+1;
}

int main{
  int length;
  int array[length];
  cin>>length;
  for(int i = 0;i<length;i++){
    cin>>array[i];
  }

  QuickSort(array[],array[0],array[length]);

  return 0;
}

Compiler output:
a.cc: In function 'void QuickSort(int*, int, int)':
a.cc:12:12: error: 'num' was not declared in this scope; did you mean 'num1'?
   12 |       A[j]=num;
      |            ^~~
      |            num1
a.cc:21:22: error: expected ')' before ';' token
   21 |   for(int k=0;k<r;k++;){
      |      ~               ^
      |                      )
a.cc:21:23: error: expected primary-expression before ')' token
   21 |   for(int k=0;k<r;k++;){
      |                       ^
a.cc:31:11: error: return-statement with a value, in function returning 'void' [-fpermissive]
   31 |   return i+1;
      |          ~^~
a.cc: At global scope:
a.cc:34:5: error: cannot declare '::main' to be a global variable
   34 | int main{
      |     ^~~~
a.cc:35:3: error: expected primary-expression before 'int'
   35 |   int length;
      |   ^~~
a.cc:35:3: error: expected '}' before 'int'
a.cc:34:9: note: to match this '{'
   34 | int main{
      |         ^
a.cc:36:13: error: 'length' was not declared in this scope
   36 |   int array[length];
      |             ^~~~~~
a.cc:37:3: error: 'cin' does not name a type
   37 |   cin>>length;
      |   ^~~
a.cc:38:3: error: expected unqualified-id before 'for'
   38 |   for(int i = 0;i<length;i++){
      |   ^~~
a.cc:38:17: error: 'i' does not name a type
   38 |   for(int i = 0;i<length;i++){
      |                 ^
a.cc:38:26: error: 'i' does not name a type
   38 |   for(int i = 0;i<length;i++){
      |                          ^
a.cc:42:19: error: creating array of template placeholder type 'array<...auto...>'
   42 |   QuickSort(array[],array[0],array[length]);
      |                   ^
a.cc:42:28: error: creating array of template placeholder type 'array<...auto...>'
   42 |   QuickSort(array[],array[0],array[length]);
      |                            ^
a.cc:42:36: error: 'length' was not declared in this scope
   42 |   QuickSort(array[],array[0],array[length]);
      |                                    ^~~~~~
a.cc:42:44: error: expected constructor, destructor, or type conversion before ';' token
   42 |   QuickSort(array[],array[0],array[length]);
      |                                            ^
a.cc:44:3: error: expected unqualified-id before 'return'
   44 |   return 0;
      |   ^~~~~~
a.cc:45:1: error: expected declaration before '}' token
   45 | }
      | ^
Language: C++

#include <iostream>
using namespace std;

void QuickSort(int A[], int p, int r){  //S:?????? B:?§???? T:??????
  int x = A[r];
  int i = p-1;
  for(int j=p;j<r;j++){
    if(A[j]<=x){
      i=i+1;
      int num1=A[i];
      A[i]=A[j];
      A[j]=num;
    }
  }
  int num2=A[i+1];
  A[i+1]=A[r];
  A[r]=num2;

  int q = i+1;

  for(int k=0;k<r;k++){
    if(A[k] != q){
      cout<<A[k]<<" ";
    }else if(A[K] = q){
      cout<<"["<<A[k]<<"]"<<" ";
    }
  }

  cout<<endl;

  return i+1;
}

int main{
  int length;
  int array[length];
  cin>>length;
  for(int i = 0;i<length;i++){
    cin>>array[i];
  }

  QuickSort(array[],array[0],array[length]);

  return 0;
}

Compiler output:
a.cc: In function 'void QuickSort(int*, int, int)':
a.cc:12:12: error: 'num' was not declared in this scope; did you mean 'num1'?
   12 |       A[j]=num;
      |            ^~~
      |            num1
a.cc:24:16: error: 'K' was not declared in this scope
   24 |     }else if(A[K] = q){
      |                ^
a.cc:31:11: error: return-statement with a value, in function returning 'void' [-fpermissive]
   31 |   return i+1;
      |          ~^~
a.cc: At global scope:
a.cc:34:5: error: cannot declare '::main' to be a global variable
   34 | int main{
      |     ^~~~
a.cc:35:3: error: expected primary-expression before 'int'
   35 |   int length;
      |   ^~~
a.cc:35:3: error: expected '}' before 'int'
a.cc:34:9: note: to match this '{'
   34 | int main{
      |         ^
a.cc:36:13: error: 'length' was not declared in this scope
   36 |   int array[length];
      |             ^~~~~~
a.cc:37:3: error: 'cin' does not name a type
   37 |   cin>>length;
      |   ^~~
a.cc:38:3: error: expected unqualified-id before 'for'
   38 |   for(int i = 0;i<length;i++){
      |   ^~~
a.cc:38:17: error: 'i' does not name a type
   38 |   for(int i = 0;i<length;i++){
      |                 ^
a.cc:38:26: error: 'i' does not name a type
   38 |   for(int i = 0;i<length;i++){
      |                          ^
a.cc:42:19: error: creating array of template placeholder type 'array<...auto...>'
   42 |   QuickSort(array[],array[0],array[length]);
      |                   ^
a.cc:42:28: error: creating array of template placeholder type 'array<...auto...>'
   42 |   QuickSort(array[],array[0],array[length]);
      |                            ^
a.cc:42:36: error: 'length' was not declared in this scope
   42 |   QuickSort(array[],array[0],array[length]);
      |                                    ^~~~~~
a.cc:42:44: error: expected constructor, destructor, or type conversion before ';' token
   42 |   QuickSort(array[],array[0],array[length]);
      |                                            ^
a.cc:44:3: error: expected unqualified-id before 'return'
   44 |   return 0;
      |   ^~~~~~
a.cc:45:1: error: expected declaration before '}' token
   45 | }
      | ^
Language: C++

#include <iostream>
using namespace std;

int partition(int A[],int p,int r){
	int x = A[r]
	int i = p-1
	
	for(j=p; j=r-1; j++){
		if(A[j] <= x){
			i = i+1;
			swap(A[i],A[j]); 
		}
	}	
	swap(A[i+1],A[r]);
		      
  return i+1;
 } 
  
 int main(){
 	int n;
	cin >> n;
 
  int A[100000];
  for(int i=0; i<n; i++){
      cin >> A[i];
  }
 
  int x = partition(A, 0, n-1);
 
  for(int i=0; i<n; i++){
      if(i==x){
          cout << '[' << A[i] << ']';
      }
      else{
          cout << A[i];
      }
      if(i<n-1){
          cout << ' ';
       }
      else{
          cout << endl;
       }
   }
 
  return 0;
}

Compiler output:
a.cc: In function 'int partition(int*, int, int)':
a.cc:6:9: error: expected ',' or ';' before 'int'
    6 |         int i = p-1
      |         ^~~
a.cc:8:18: error: 'j' was not declared in this scope
    8 |         for(j=p; j=r-1; j++){
      |                  ^
a.cc:14:16: error: 'i' was not declared in this scope
   14 |         swap(A[i+1],A[r]);
      |                ^
Language: C++

#include <iostream>
using namespace std;

int partition(int A[],int p,int r){
	int x = A[r]
	int i = p-1
	
	for(int j=p; j=r-1; j++){
		if(A[j] <= x){
			i = i+1;
			swap(A[i],A[j]); 
		}
	}	
	swap(A[i+1],A[r]);
		      
  return i+1;
 } 
  
 int main(){
 	int n;
	cin >> n;
 
  int A[100000];
  for(int i=0; i<n; i++){
      cin >> A[i];
  }
 
  int x = partition(A, 0, n-1);
 
  for(int i=0; i<n; i++){
      if(i==x){
          cout << '[' << A[i] << ']';
      }
      else{
          cout << A[i];
      }
      if(i<n-1){
          cout << ' ';
       }
      else{
          cout << endl;
       }
   }
 
  return 0;
}

Compiler output:
a.cc: In function 'int partition(int*, int, int)':
a.cc:6:9: error: expected ',' or ';' before 'int'
    6 |         int i = p-1
      |         ^~~
a.cc:8:22: error: 'j' was not declared in this scope
    8 |         for(int j=p; j=r-1; j++){
      |                      ^
a.cc:14:16: error: 'i' was not declared in this scope
   14 |         swap(A[i+1],A[r]);
      |                ^
Language: C++

#include <iostream>
using namespace std;

int partition(int A[],int p,int r){
	int x = A[r]
	int i = p-1
	
	for(int j=p; j<=r-1; j++){
		if(A[j] <= x){
			i = i+1;
			swap(A[i],A[j]); 
		}
	}	
	swap(A[i+1],A[r]);
		      
  return i+1;
 } 
  
 int main(){
 	int n;
	cin >> n;
 
  int A[100000];
  for(int i=0; i<n; i++){
      cin >> A[i];
  }
 
  int x = partition(A, 0, n-1);
 
  for(int i=0; i<n; i++){
      if(i==x){
          cout << '[' << A[i] << ']';
      }
      else{
          cout << A[i];
      }
      if(i<n-1){
          cout << ' ';
       }
      else{
          cout << endl;
       }
   }
 
  return 0;
}

Compiler output:
a.cc: In function 'int partition(int*, int, int)':
a.cc:6:9: error: expected ',' or ';' before 'int'
    6 |         int i = p-1
      |         ^~~
a.cc:8:22: error: 'j' was not declared in this scope
    8 |         for(int j=p; j<=r-1; j++){
      |                      ^
a.cc:14:16: error: 'i' was not declared in this scope
   14 |         swap(A[i+1],A[r]);
      |                ^