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

#include<stdiio.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(){
  int i, 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) printf(" ");
    if(i==q) printf("[");
    printf("%d", A[i]);
    if(i==q) printf("]");
  }
  printf("\n");

  return 0;
}  

Compiler output:
main.c:1:9: fatal error: stdiio.h: No such file or directory
    1 | #include<stdiio.h>
      |         ^~~~~~~~~~
compilation terminated.
Language: C

#include<stdio.h>
#define MAX 1000000

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



int main(){
     scant("%d",&n);
     int i;
     for(int i=0;i<n;i++){
        scant("%d",&A[i]);
     }
     int p = partition(A,0,n-1);
     for(int i=0;i<n;i++){
     	if(i) printf(" ");
     	if(i==p) printf("[");
     	printf("%d",A[i]);
     	if(i==p) printf("]");
     }
     printf("\n");
    return 0; 
}

Compiler output:
main.c:5:17: error: expected ';', ',' or ')' before 'A'
    5 | void swap(int[] A,int i,int j){
      |                 ^
main.c:10:21: error: expected ';', ',' or ')' before 'A'
   10 | int partition(int[] A,int p,int r){
      |                     ^
main.c: In function 'main':
main.c:26:6: error: implicit declaration of function 'scant'; did you mean 'scanf'? [-Wimplicit-function-declaration]
   26 |      scant("%d",&n);
      |      ^~~~~
      |      scanf
main.c:31:14: error: implicit declaration of function 'partition' [-Wimplicit-function-declaration]
   31 |      int p = partition(A,0,n-1);
      |              ^~~~~~~~~
Language: C

#include<stdio.h>
#define MAX 1000000

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



int main(){
     scant("%d",&n);
     int i;
     for(i=0;i<n;i++){
        scant("%d",&A[i]);
     }
     int p = partition(A,0,n-1);
     for(i=0;i<n;i++){
     	if(i) printf(" ");
     	if(i==p) printf("[");
     	printf("%d",A[i]);
     	if(i==p) printf("]");
     }
     printf("\n");
    return 0; 
}

Compiler output:
main.c:5:17: error: expected ';', ',' or ')' before 'A'
    5 | void swap(int[] A,int i,int j){
      |                 ^
main.c:10:21: error: expected ';', ',' or ')' before 'A'
   10 | int partition(int[] A,int p,int r){
      |                     ^
main.c: In function 'main':
main.c:26:6: error: implicit declaration of function 'scant'; did you mean 'scanf'? [-Wimplicit-function-declaration]
   26 |      scant("%d",&n);
      |      ^~~~~
      |      scanf
main.c:31:14: error: implicit declaration of function 'partition' [-Wimplicit-function-declaration]
   31 |      int p = partition(A,0,n-1);
      |              ^~~~~~~~~
Language: C

#include<stdio.h>
#define MAX 1000000

int A[MAX],n;
int partition(int[] A,int p,int r){
    int x = A[r];
    int i =p-1;
    int t;
    fo(int 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(){
     scant("%d",&n);
     int i;
     for(i=0;i<n;i++){
        scant("%d",&A[i]);
     }
     int p = partition(A,0,n-1);
     for(i=0;i<n;i++){
     	if(i) printf(" ");
     	if(i==p) printf("[");
     	printf("%d",A[i]);
     	if(i==p) printf("]");
     }
     printf("\n");
    return 0; 
}

Compiler output:
main.c:5:21: error: expected ';', ',' or ')' before 'A'
    5 | int partition(int[] A,int p,int r){
      |                     ^
main.c: In function 'main':
main.c:22:6: error: implicit declaration of function 'scant'; did you mean 'scanf'? [-Wimplicit-function-declaration]
   22 |      scant("%d",&n);
      |      ^~~~~
      |      scanf
main.c:27:14: error: implicit declaration of function 'partition' [-Wimplicit-function-declaration]
   27 |      int p = partition(A,0,n-1);
      |              ^~~~~~~~~
Language: C

#include<stdio.h>
#define MAX 1000000

int A[MAX],n;
int partition(int[] A,int p,int r){
    int x = A[r];
    int i =p-1;
    int t;
    fo(int 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(){
     scanf("%d",&n);
     int i;
     for(i=0;i<n;i++){
        scanf("%d",&A[i]);
     }
     int p = partition(A,0,n-1);
     for(i=0;i<n;i++){
     	if(i) printf(" ");
     	if(i==p) printf("[");
     	printf("%d",A[i]);
     	if(i==p) printf("]");
     }
     printf("\n");
    return 0; 
}

Compiler output:
main.c:5:21: error: expected ';', ',' or ')' before 'A'
    5 | int partition(int[] A,int p,int r){
      |                     ^
main.c: In function 'main':
main.c:24:14: error: implicit declaration of function 'partition' [-Wimplicit-function-declaration]
   24 |      int p = partition(A,0,n-1);
      |              ^~~~~~~~~
Language: C

#include<stdio.h>
#define MAX 1000000

int A[MAX],n;
int partition(int p,int r){
    int x = A[r];
    int i =p-1;
    int t;
    fo(int 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(){
     scanf("%d",&n);
     int i;
     for(i=0;i<n;i++){
        scanf("%d",&A[i]);
     }
     int p = partition(0,n-1);
     for(i=0;i<n;i++){
     	if(i) printf(" ");
     	if(i==p) printf("[");
     	printf("%d",A[i]);
     	if(i==p) printf("]");
     }
     printf("\n");
    return 0; 
}

Compiler output:
main.c: In function 'partition':
main.c:9:5: error: implicit declaration of function 'fo'; did you mean 'feof'? [-Wimplicit-function-declaration]
    9 |     fo(int j=p;j<r;j++){
      |     ^~
      |     feof
main.c:9:8: error: expected expression before 'int'
    9 |     fo(int j=p;j<r;j++){
      |        ^~~
main.c:9:24: error: expected ';' before '{' token
    9 |     fo(int j=p;j<r;j++){
      |                        ^
      |                        ;
Language: C

#include<stdio.h>
#define MAX 1000000

int A[MAX],n;
int partition(int p,int r){
    int x = A[r];
    int i =p-1;
    int t;
    fo(int 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(){
     scanf("%d",&n);
     int i;
     for(i=0;i<n;i++){
        scanf("%d",&A[i]);
     }
     int p = partition(0,n-1);
     for(i=0;i<n;i++){
     	if(i) printf(" ");
     	if(i==p) printf("[");
     	printf("%d",A[i]);
     	if(i==p) printf("]");
     }
     printf("\n");
    return 0; 
}

Compiler output:
main.c: In function 'partition':
main.c:9:5: error: implicit declaration of function 'fo'; did you mean 'feof'? [-Wimplicit-function-declaration]
    9 |     fo(int j=p;j<r;j++){
      |     ^~
      |     feof
main.c:9:8: error: expected expression before 'int'
    9 |     fo(int j=p;j<r;j++){
      |        ^~~
main.c:9:24: error: expected ';' before '{' token
    9 |     fo(int j=p;j<r;j++){
      |                        ^
      |                        ;
Language: C

#include <stdio.h>
#define MAX 100000
int A[MAX],n;
int partition(int p,int r){
  int x,i,j,temp;
  x=A[r];
  i=p-1;
  for(j=p;j<r;j++){
    if(A[j]<=x){
      i++;
      temp=A[i];
      A[i]=A[j];
      A[j]=temp;
    }
  }
  temp=A[i+1];
  A[i+1]=A[r];
  A[r]=A[i+1];
  return i+1;
}
int main(){
  int i,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) printf(" ");
    if(i==q) printf("[");
    printf("%d",A[i]);
    if(i==p) printf("]");
  }
  printf("\n");
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:32:11: error: 'p' undeclared (first use in this function)
   32 |     if(i==p) printf("]");
      |           ^
main.c:32:11: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

int partition(int *,int,int);

int main(){
	int i,A[100000],num;
	
	scanf("%d",&num);
	
	for(i=0;i<num;i++){
		scanf("%d",&A[i]);
	}
	
	partition(A,1,num);
	
	for(i=0;;i++){
		printf("%d",A[i]);
		if(i>=num){
			break;
		}
		printf(" ");
	}
	return 0;
}

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

Compiler output:
main.c: In function 'partition':
main.c:30:13: error: 'j' undeclared (first use in this function)
   30 |         for(j = p; j < r; j++){
      |             ^
main.c:30:13: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

int partition(int *,int,int);

int main(){
	int i,A[100000],num,center;
	
	scanf("%d",&num);
	
	for(i=0;i<num;i++){
		scanf("%d",&A[i]);
	}
	
	center = partition(A,1,num);
	
	for(i=0;;i++){
		printf("%d",A[i]);
		if(i>=num){
			break;
		}
		printf(" ");
	}
	return 0;
}

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

Compiler output:
main.c: In function 'partition':
main.c:30:13: error: 'j' undeclared (first use in this function)
   30 |         for(j = p; j < r; j++){
      |             ^
main.c:30:13: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include<stdio.h>
#define MAX 100000

int partition(int *A,int p,int r);

int main(){
  int n,i;
  int *A;
  
  scanf("%d",&n);
  
  A = malloc(sizeof(int)*n+2);

  for(i = 0;i < n; i++){
    scanf("%d",&A[i+1]);
  }
  x = A[n-1];
  q = partition(*A,1,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(*A,p,r){
    int x,j,i;
    int chg;
    x = A[r];
    i = p-1;
    for(j = p;j<r-1;j++){
    if(A[j] <= x){
      i++;
      chg = A[i];
      A[i] = A[j];
      A[j] = chg;
    }
    }
    chg = A[i+1];
    A[i+1] = A[r];
    A[r] = chg;
    return i+1;
  }

Compiler output:
main.c: In function 'main':
main.c:12:7: error: implicit declaration of function 'malloc' [-Wimplicit-function-declaration]
   12 |   A = malloc(sizeof(int)*n+2);
      |       ^~~~~~
main.c:2:1: note: include '<stdlib.h>' or provide a declaration of 'malloc'
    1 | #include<stdio.h>
  +++ |+#include <stdlib.h>
    2 | #define MAX 100000
main.c:12:7: warning: incompatible implicit declaration of built-in function 'malloc' [-Wbuiltin-declaration-mismatch]
   12 |   A = malloc(sizeof(int)*n+2);
      |       ^~~~~~
main.c:12:7: note: include '<stdlib.h>' or provide a declaration of 'malloc'
main.c:17:3: error: 'x' undeclared (first use in this function)
   17 |   x = A[n-1];
      |   ^
main.c:17:3: note: each undeclared identifier is reported only once for each function it appears in
main.c:18:3: error: 'q' undeclared (first use in this function)
   18 |   q = partition(*A,1,n-1);
      |   ^
main.c:18:17: error: passing argument 1 of 'partition' makes pointer from integer without a cast [-Wint-conversion]
   18 |   q = partition(*A,1,n-1);
      |                 ^~
      |                 |
      |                 int
main.c:4:20: note: expected 'int *' but argument is of type 'int'
    4 | int partition(int *A,int p,int r);
      |               ~~~~~^
main.c: At top level:
main.c:32:17: error: expected declaration specifiers or '...' before '*' token
   32 |   int partition(*A,p,r){
      |                 ^
main.c:32:20: error: unknown type name 'p'
   32 |   int partition(*A,p,r){
      |                    ^
main.c:32:22: error: unknown type name 'r'
   32 |   int partition(*A,p,r){
      |                      ^
Language: C

#include<stdio.h>
   
#define N 100000
 
int Partition(int *,int,int);
 
int main(){
  int n,i,p,r;
  int A[N];
 
  scanf("%d", &n);
 for(i = 0; i < n; i++) {
  scanf("%d", &A[i]);
 }
   
  r = Partition(A,p,n-1);
 
  for(i=0; i<n; i++){
    if(i != 0)
      printf(" ");
    if(r == i)
      printf("[%d]",A[i]);
    else
      printf("%d",A[i]);
  }
  printf("\n");
   
  return 0;
}
 

Compiler output:
/usr/bin/ld: /tmp/ccE4WnuE.o: in function `main':
main.c:(.text+0x7c): undefined reference to `Partition'
collect2: error: ld returned 1 exit status
Language: C

#include<stdio.h>
#define N 100000
int partition(int A[], int p, int r);
int main(){
  int i,j,n,A[N];
  scanf("%d", &n);
  for(i = 0; i < n; i++){
    scanf("%d", &A[n]);
  }
  while(i = n){
    i = partion(A ,i,n-1);
  }
  return 0;
}

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

Compiler output:
main.c: In function 'main':
main.c:11:9: error: implicit declaration of function 'partion'; did you mean 'partition'? [-Wimplicit-function-declaration]
   11 |     i = partion(A ,i,n-1);
      |         ^~~~~~~
      |         partition
Language: C

#include<stdio.h>
#define N 100000
int partition(int *, int , int );
int main(){
  int i,j,n,A[N];
  scanf("%d", &n);
  for(i = 0; i < n; i++){
    scanf("%d", &A[n]);
  }

    j = partion(A ,0,n-1);
    for(i = 0;i<j; i++){
      printf("%d",A[i]);
      printf(" ");
    }
    printf("[%d] ", A[j]);
    for(i = j+1; i < n; i++){
      printf("%d", A[i]);
      if(i < n-1)printf(" ");
    }
  return 0;
}

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

Compiler output:
main.c: In function 'main':
main.c:11:9: error: implicit declaration of function 'partion'; did you mean 'partition'? [-Wimplicit-function-declaration]
   11 |     j = partion(A ,0,n-1);
      |         ^~~~~~~
      |         partition
main.c: In function 'partition':
main.c:27:3: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'x'
   27 |   x = A[r];
      |   ^
main.c:32:7: error: 'copy' undeclared (first use in this function)
   32 |       copy = A[i];
      |       ^~~~
main.c:32:7: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>
#define N 100001
??
int Partition(int *,int,int);
??
int main()
{
????int A[N];
????int i;
????int n;
????int j;
????scanf("%d",&n);
??????
????for(i=1;i<=n;i++)
????????{
????????????scanf("%d",&A[i]);
??????????????
????????}
????j = Partition(A,1,n);
??????
????for(i=1;i<=n;i++)
????????{
????????????if(i == j)printf("[%d] ",A[i]);
????????????else if(i==n)printf("%d\n",A[i]);
????????????else printf("%d ",A[i]);
????????}
??
return 0;
??????
}
????
int Partition (int *A,int p,int r)
{
????int x;
????int i;
????int j;
????int temp;
????x=A[r];
????i=p-1;
??????
??for(j=p;j<r;j++)
????????{
????????????if(A[j]<=x)
????????{
????????????i++;
????????????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:3:1: error: expected identifier or '(' before '?' token
    3 | ??
      | ^
main.c:5:1: error: expected identifier or '(' before '?' token
    5 | ??
      | ^
main.c:31:1: error: expected identifier or '(' before '?' token
   31 | ????
      | ^
Language: C

#include<stdio.h>

int A[100000];
int n;

int par(int p,int r){
  int x,i,j,t;
  i=p-1;
  x=A[r];
  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(){
  int i,q;

  scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }
  q=par(0,n-1);
  for(i=0;i<n;i++){
    if(i==0)print(" ");
    if(i==q)printf("[");
    printf("%d",A[i]);
    if(i==q)printf("]")
	      }
  printf("\n");

  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:34:13: error: implicit declaration of function 'print'; did you mean 'printf'? [-Wimplicit-function-declaration]
   34 |     if(i==0)print(" ");
      |             ^~~~~
      |             printf
main.c:37:24: error: expected ';' before '}' token
   37 |     if(i==q)printf("]")
      |                        ^
      |                        ;
   38 |               }
      |               ~
Language: C

#include <stdio.h>
#define N 100001
??
int Partition(int *,int,int);
??
int main()
{
????int A[N];
????int i;
????int n;
????int k;
????scanf("%d",&n);
??????
????for(i=1;i<=n;i++)
????????{
????????????scanf("%d",&A[i]);
??????????????
????????}
????k = Partition(A,1,n);
??????
????for(i=1;i<=n;i++)
????????{
????????????if(i == k)printf("[%d] ",A[i]);
????????????else if(i==n)printf("%d\n",A[i]);
????????????else printf("%d ",A[i]);
????????}
??
return 0;
??????
}
????
int Partition (int *A,int p,int r)
{
????int x;
????int i;
????int j;
????int temp;
????x=A[r];
????i=p-1;
??????
??for(j=p;j<r;j++)
????????{
????????????if(A[j]<=x)
????????{
????????????i++;
????????????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:3:1: error: expected identifier or '(' before '?' token
    3 | ??
      | ^
main.c:5:1: error: expected identifier or '(' before '?' token
    5 | ??
      | ^
main.c:31:1: error: expected identifier or '(' before '?' token
   31 | ????
      | ^
Language: C

#include<stdio.h>
????
#define N 100001
????
void Partition(int A[], int p, int r){
????int x, i, j;
????int temp;
????
????x = A[r];
????i = p-1;
????
????for(j = p; j <= r-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;
??

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

Compiler output:
main.c:2:1: error: expected identifier or '(' before '?' token
    2 | ????
      | ^
main.c:34:1: error: expected identifier or '(' before '?' token
   34 | ????
      | ^
Language: C

#include<stdio.h>
#define MAX 100000
int partition(A,p,r);
int main(){
  int n,i,x;
  int A[MAX];
  scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }
  x=partition(A,0,n-1);
  for(i=0;i<x;i++){
    printf("%d",A[i]);
    printf(" ");
  }
  printf("%d",A[x]);
  for(i=x+1;i<n;i++){
    printf("%d",A[i]);
    if(n==n-1)printf("\n");
    else printf(" ");
  }
  return 0;
}

int partition(int A,int p,int r){
  int x;
  
  

Compiler output:
main.c:3:1: error: parameter names (without types) in function declaration [-Wdeclaration-missing-parameter-type]
    3 | int partition(A,p,r);
      | ^~~
main.c: In function 'partition':
main.c:26:3: error: expected declaration or statement at end of input
   26 |   int x;
      |   ^~~
Language: C

#include <stdio.h>
#define MAX 100000

int partition(int, int);
int A[MAX];

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

  p = patition(0,n-1);

  for(i = 0; i < p; i++){
    printf("%d ",A[i]);
  }

  printf("[%d]",A[p]);
  
  for(i = p + 1; i < n; i++){
    printf(" %d",A[i]);
  }
  printf("\n");

  return 0;
}


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

  return i+1;
}

Compiler output:
main.c: In function 'main':
main.c:14:7: error: implicit declaration of function 'patition'; did you mean 'partition'? [-Wimplicit-function-declaration]
   14 |   p = patition(0,n-1);
      |       ^~~~~~~~
      |       partition
main.c: In function 'partition':
main.c:31:5: error: type of 'p' defaults to 'int' [-Wimplicit-int]
   31 | int partition(p, r){
      |     ^~~~~~~~~
main.c:31:5: error: type of 'r' defaults to 'int' [-Wimplicit-int]
Language: C

include <stdio.h>
#define N 100000

int A[N];

int partition(int A[], int p, int r){
  int i, j, x, temp1, temp2;

  x = A[r];
  i = p-1;
  for(j=p; j<r; j++){
    if(A[j]<=x){
      i = i+1;
      temp1 = A[i];
      A[i] = A[j];
      A[j] = temp1;
    }
  }
  temp2 = A[i+1];
  A[i+1] = A[r];
  A[r] = temp2;
  return i+1;
}

int main(){

  int i, n, x, ans;

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

  x = A[n-1];
  ans = partition(A, 0, n-1);

  for(i=0; i<n; i++){
    if(A[i] == x) printf("[");
    printf("%d", A[i]);
    if(A[i] == x) printf("]");
    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 'main':
main.c:29:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
   29 |   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:29:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
   29 |   scanf("%d", &n);
      |   ^~~~~
main.c:29:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:31:18: error: 'A' undeclared (first use in this function)
   31 |     scanf("%d", &A[i]);
      |                  ^
main.c:31:18: note: each undeclared identifier is reported only once for each function it appears in
main.c:38:19: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   38 |     if(A[i] == x) printf("[");
      |                   ^~~~~~
main.c:38:19: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:38:19: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:38:19: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:39:5: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   39 |     printf("%d", A[i]);
      |     ^~~~~~
main.c:39:5: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:43:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   43 |   printf("\n");
      |   ^~~~~~
main.c:43:3: note: include '<stdio.h>' or provide a declaration of 'printf'
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[r] = t;
    }
  }
    t = A[i + 1}; A[i + 1] = A[r]; A[r] = t;
    return i + 1;
}

int main(){
  int i, 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) printf(" ");
    if(i == q) printf("[");
    printf("%d", A[i]);
    if(i == q) printf("]");
  }

  printf("\n");

  return 0;
}

Compiler output:
main.c: In function 'partition':
main.c:16:16: error: expected ']' before '}' token
   16 |     t = A[i + 1}; A[i + 1] = A[r]; A[r] = t;
      |                ^
      |                ]
main.c:16:16: error: expected ';' before '}' token
   16 |     t = A[i + 1}; A[i + 1] = A[r]; A[r] = t;
      |                ^
      |                ;
main.c: At top level:
main.c:16:21: error: 'i' undeclared here (not in a function)
   16 |     t = A[i + 1}; A[i + 1] = A[r]; A[r] = t;
      |                     ^
main.c:16:19: warning: data definition has no type or storage class
   16 |     t = A[i + 1}; A[i + 1] = A[r]; A[r] = t;
      |                   ^
main.c:16:19: error: type defaults to 'int' in declaration of 'A' [-Wimplicit-int]
main.c:16:32: error: 'r' undeclared here (not in a function)
   16 |     t = A[i + 1}; A[i + 1] = A[r]; A[r] = t;
      |                                ^
main.c:16:36: warning: data definition has no type or storage class
   16 |     t = A[i + 1}; A[i + 1] = A[r]; A[r] = t;
      |                                    ^
main.c:16:36: error: type defaults to 'int' in declaration of 'A' [-Wimplicit-int]
main.c:16:43: error: 't' undeclared here (not in a function)
   16 |     t = A[i + 1}; A[i + 1] = A[r]; A[r] = t;
      |                                           ^
main.c:17:5: error: expected identifier or '(' before 'return'
   17 |     return i + 1;
      |     ^~~~~~
main.c:18:1: error: expected identifier or '(' before '}' token
   18 | }
      | ^
Language: C

#include <stdio.h>
#define MAX 100000

int A[MAX];

int partition(int p,int r){
int x = A[r];
int i=p-1;
int j,store;
for(j=p;j<r;j++){
if(A[j]<=x){
i+=1;
store = A[i];
A[i] = A[j];
A[J] = store;
}
}
store = A[i+1];
A[i+1] = A[r];
A[r] = store;
return i+1;
}
int main(){
int n,i;
int prt;
scanf("%d",&n);

for(i=0;i<n;i++){
scanf("%d",&A[i]);
prt = partition(0,n-1);

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

Compiler output:
main.c: In function 'partition':
main.c:15:3: error: 'J' undeclared (first use in this function)
   15 | A[J] = store;
      |   ^
main.c:15:3: note: each undeclared identifier is reported only once for each function it appears in
main.c: In function 'main':
main.c:39:1: error: expected declaration or statement at end of input
   39 | }
      | ^
Language: C

#include <stdio.h>
#define MAX 100000

int A[MAX];

int partition(int p,int r){

 	int x = A[r];
	int i = p-1;
	int temp,j;

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

int main(){

	int n,i,,a,b ;

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

	a = partition(0,n/2-1);
	b = partition(n/2,n);

	for(i = 0; i < n; i++){
		if(i == n/2) printf("[%d]\n",A[i]);
		else printf("%d\n",A[i]);
	}

	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:29:17: error: expected identifier or '(' before ',' token
   29 |         int n,i,,a,b ;
      |                 ^
main.c:34:9: error: 'a' undeclared (first use in this function)
   34 |         a = partition(0,n/2-1);
      |         ^
main.c:34:9: note: each undeclared identifier is reported only once for each function it appears in
main.c:35:9: error: 'b' undeclared (first use in this function)
   35 |         b = partition(n/2,n);
      |         ^
main.c: In function 'partition':
main.c:43:1: error: expected declaration or statement at end of input
   43 | }
      | ^
Language: C

#include <stdio.h>
#include <stdlib.h>
#define MAX 100000
 
int Partition(int [], int, int);
void Quicksort(int [], int, int);
 
int q;
 
int main(void){
 
  int A[MAX+1];
  int i, p, n;
 
  scanf("%d",&n);
 
  for(i=1;i<=n;i++) scanf("%d",&A[i]);
  p = 1;
  q = Quicksort(A, p, n);
 
 
  for(i=1;i< n;i++){
    if(i==q) printf("[%d] ",A[i]);
    else printf("%d ",A[i]);
  } 

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

Compiler output:
main.c: In function 'main':
main.c:19:5: error: void value not ignored as it ought to be
   19 |   q = Quicksort(A, p, n);
      |     ^
Language: C

#include<stdio.h>

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

int main(void){
  int n, i, mark;
  scanf("%d", &n);
  int A[n];
  for(i=0;i<n;i++)
    scanf("%d", &A[i]);
  mark = partition(A, 0, n-1);
  for(i=0;i<mark;i++)
    printf("%d ", A[i]);
  printf("[%d]", A[mark]);
  for(i=mark+1;i<n;i++)
    printf(" %d", A[i]);
  return 0;
} 

Compiler output:
main.c:3:15: error: unknown type name 'A'
    3 | int partition(A[], p, r){
      |               ^
main.c:3:20: error: unknown type name 'p'
    3 | int partition(A[], p, r){
      |                    ^
main.c:3:23: error: unknown type name 'r'
    3 | int partition(A[], p, r){
      |                       ^
main.c: In function 'main':
main.c:21:10: error: implicit declaration of function 'partition' [-Wimplicit-function-declaration]
   21 |   mark = partition(A, 0, n-1);
      |          ^~~~~~~~~
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] = A[i];
    }
  t = A[i + 1] ; A[i + 1] = A[r]; A[r] = t;
  return i + 1;
}

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

Compiler output:
main.c: In function 'main':
main.c:21:3: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
   21 |   scanf_s("%d", &n);
      |   ^~~~~~~
      |   scanf
main.c:23:17: error: passing argument 1 of 'partition' makes integer from pointer without a cast [-Wint-conversion]
   23 |   q = partition(A, 0, n-1);
      |                 ^
      |                 |
      |                 int *
main.c:6:19: note: expected 'int' but argument is of type 'int *'
    6 | int partition(int p, int r) {
      |               ~~~~^
main.c:23:7: error: too many arguments to function 'partition'
   23 |   q = partition(A, 0, n-1);
      |       ^~~~~~~~~
main.c:6:5: note: declared here
    6 | int partition(int p, int r) {
      |     ^~~~~~~~~
main.c: In function 'partition':
main.c:32:1: error: expected declaration or statement at end of input
   32 | }
      | ^
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] = A[i];
    }
  t = A[i + 1] ; A[i + 1] = A[r]; A[r] = t;
  return i + 1;
}
 
int main() {
  int i, q;
  scanf_s("%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 ) printf(" ");
    if ( i == q ) printf("[");
    printf("%d", A[i]);
    if ( i == q ) printf("]");
  }
  printf("\n");
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:21:3: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
   21 |   scanf_s("%d", &n);
      |   ^~~~~~~
      |   scanf
main.c: In function 'partition':
main.c:32:1: error: expected declaration or statement at end of input
   32 | }
      | ^
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] = A[i];
    }
  }
  t = A[i + 1] ; A[i + 1] = A[r]; A[r] = t;
  return i + 1;
}
 
int main() {
  int i, q;
  scanf_s("%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 ) printf(" ");
    if ( i == q ) printf("[");
    printf("%d", A[i]);
    if ( i == q ) printf("]");
  }
  printf("\n");
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:22:3: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
   22 |   scanf_s("%d", &n);
      |   ^~~~~~~
      |   scanf
Language: C

#include<stdio.h>

#dwfine 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+1];
	A[i+1]=A[r];
	A[r]=t;
	return 0;
}

int main(){
	int i,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) printf(" ");
		if(i==q) printf("[");
		printf("%d",A[i]);
		if(i==q) printf("]");
	}
	printf("\n");
	return 0;
}

Compiler output:
main.c:3:2: error: invalid preprocessing directive #dwfine; did you mean #define?
    3 | #dwfine MAX 100000
      |  ^~~~~~
      |  define
main.c:5:7: error: 'MAX' undeclared here (not in a function)
    5 | int A[MAX],n;
      |       ^~~
Language: C

#include<stdio.h>
#define MAX 100000

int A[MAX], n;

int partiton(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(){
	int i,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) printf(" ");
		if(i == q) printf("[");
		printf("%d",A[i]);
		if(i == q) printf("]");
	}
	printf("\n");
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:26:13: error: implicit declaration of function 'partition'; did you mean 'partiton'? [-Wimplicit-function-declaration]
   26 |         q = partition(0, n - 1);
      |             ^~~~~~~~~
      |             partiton
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(){
	int i,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)printf(" ");
		if(i==q)printf("[");
		printf("%d",A[i]);
		if(i==q)printf("]");
	}
	printf(\n);
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:23:20: error: expected ';' before ':' token
   23 |         for(i=0;i<n:i++)scanf("%d",&A[i]);
      |                    ^
      |                    ;
main.c:33:16: error: stray '\' in program
   33 |         printf(\n);
      |                ^
main.c:33:17: error: passing argument 1 of 'printf' makes pointer from integer without a cast [-Wint-conversion]
   33 |         printf(\n);
      |                 ^
      |                 |
      |                 int
In file included from main.c:1:
/usr/include/stdio.h:363:43: note: expected 'const char * restrict' but argument is of type 'int'
  363 | extern int printf (const char *__restrict __format, ...);
      |                    ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
Language: C

#include<stdio.h>
#define MAX 100000

int A[MAX], n;

int parti(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;
	
	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) printf(" ");
		if (i == q) printf("[");
		printf("%d",A[i]);
		if (i == q) printf("]");
	}
	printf("\n");
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:26:13: error: implicit declaration of function 'partition' [-Wimplicit-function-declaration]
   26 |         q = partition(0, n - 1);
      |             ^~~~~~~~~
Language: C

#include<stdio.h>
??
#define N 100000
??
int A[N],n;
??
int partition(int p,int r){
????int x,i,j,tmp;
????x=A[r];
????i=p-1;
????for(j=p;j<r;j++){
????????if(A[j] <= x){
????????????i++;
????????????tmp=A[i]; A[i]=A[j]; A[j]=tmp;
????????}
????}
????tmp=A[i+1]; A[i+1]=A[r]; A[r]=tmp;
????return i+1;
}
??
int main(void){
??
????int i,p;
??????
????scanf("%d",&n);
????for(i=0;i<n;i++) scanf("%d",&A[i]);
????p=partition(0,n-1);
??
????for(i=0;i<n;i++){
????????if(i) printf(" ");
????????if(i==p) printf("[%d]",A[i]);
????????else printf("%d",A[i]);
????}
????printf("\n");
??????
????return 0;
}

Compiler output:
main.c:2:1: error: expected identifier or '(' before '?' token
    2 | ??
      | ^
main.c:6:1: error: expected identifier or '(' before '?' token
    6 | ??
      | ^
main.c:20:1: error: expected identifier or '(' before '?' token
   20 | ??
      | ^
Language: C

#include<stdio.h>
#define N 100000??
int A[N],n;??
int partition(int p,int r){
????int x,i,j,tmp;
????x=A[r];
????i=p-1;
????for(j=p;j<r;j++){
????????if(A[j] <= x){
????????????i++;
????????????tmp=A[i]; A[i]=A[j]; A[j]=tmp;
????????}
????}
????tmp=A[i+1]; A[i+1]=A[r]; A[r]=tmp;
????return i+1;
}
??
int main(void){
??
????int i,p;
??????
????scanf("%d",&n);
????for(i=0;i<n;i++) scanf("%d",&A[i]);
????p=partition(0,n-1);
??
????for(i=0;i<n;i++){
????????if(i) printf(" ");
????????if(i==p) printf("[%d]",A[i]);
????????else printf("%d",A[i]);
????}
????printf("\n");
??????
????return 0;
}

Compiler output:
main.c:2:18: error: expected expression before '?' token
    2 | #define N 100000??
      |                  ^
main.c:3:7: note: in expansion of macro 'N'
    3 | int A[N],n;??
      |       ^
main.c:17:1: error: expected identifier or '(' before '?' token
   17 | ??
      | ^
Language: C

#include <stdio.h>
void swap(int *A, int p, int r){
  int x=A[p];
  A[p]=A[r];
  A[r]=x;
}
int partition(int *A, int p, int r){
  int x=A[r];
  int i=p-1, j;
  for(j=p; j<r; ++j){
	if(A[j]<=x){
	  ++i;
	  swap(A, i, j);
	}
  }
  swap(i+1, r);
  return i+1;
}
int main(){
  int n;
  int i;
  scanf("%d", &n);
  int A[n];
  for(i=0; i<n; ++i){
	scanf("%d", &A[i]);
  }
  int q=partition(A, 0, n-1);
  
  for(i=0; i<n; ++i){
	if(i==q)
	  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:16:9: error: passing argument 1 of 'swap' makes pointer from integer without a cast [-Wint-conversion]
   16 |   swap(i+1, r);
      |        ~^~
      |         |
      |         int
main.c:2:16: note: expected 'int *' but argument is of type 'int'
    2 | void swap(int *A, int p, int r){
      |           ~~~~~^
main.c:16:3: error: too few arguments to function 'swap'
   16 |   swap(i+1, r);
      |   ^~~~
main.c:2:6: note: declared here
    2 | void swap(int *A, int p, int r){
      |      ^~~~
Language: C

#include <stdio.h>

void swap(int *x, int *y) {
  int tmp = *x;
  *x = *y;
  *y = tmp;
}

void partition(int a[], int p, int r) {
  int i = p - 1;
  for (int j = p; j <= r - 1; j++) {
    if (a[j] <= a[r]) {
      i++;
      // int tmp = a[i];
      // a[i] = a[j];
      // a[j] = tmp;
      swap(&a[i], &a[j]);
    }
  }
  swap(&a[i+1], &a[r])
  // int tmp = a[i+1];
  // a[i+1] = a[r];
  // a[r] = tmp;

  for (int k = 0; k <= r; k++) {
    if (k == i + 1) {
      printf("[%d]", a[k]);
    } else {
      printf("%d", a[k]);
    }
    if (k == r) {
      printf("\n");
    } else {
      printf(" ");
    }
  }
}
int main() {
  int n;
  scanf("%d", &n);
  int a[n];
  for (int i = 0; i < n; i++) {
    scanf("%d", &a[i]);
  }
  partition(a, 0, n - 1);
  return 0;
}



Compiler output:
main.c: In function 'partition':
main.c:20:23: error: expected ';' before 'for'
   20 |   swap(&a[i+1], &a[r])
      |                       ^
      |                       ;
......
   25 |   for (int k = 0; k <= r; k++) {
      |   ~~~
Language: C

#include <stdio.h>

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

int main(){
  int n,q;
  int A[100000];

  while(scanf("%d",&n) != EOF){
    for(int i=0;i<n;i++){
      scanf("%d",&A[i]);
    }
    q = partition(A,0,n-1);
    for(int i=0;i<n-1;i++){
      if(A[i] == q)
        printf("[%d] ",A[i]);
      else
        printf("%d ",A[i]);
    }
    if(A[i] == q)
      printf("[%d]\n",A[i]);
    else
      printf("%d\n",A[i]);
  }
  return 0;
}



Compiler output:
main.c: In function 'main':
main.c:36:10: error: 'i' undeclared (first use in this function)
   36 |     if(A[i] == q)
      |          ^
main.c:36:10: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

#define MAX 10000

void swap(int*,int*);
void Partirion(int,int,int*);

int n, test;

void Printf(int i,int *A)
{
    int j;
    for(j = 0;  j < n; j++)
    {
        if(j != 0) printf(" ");
        if(j == i) printf("[%d]",A[j]);
        else printf("%d",A[j]);
        printf("\n");
    }
}

void Partirion(int l,int r,int *A)
{
    int x = A[r];
    int i = l, j;
    
    for(j = l; j < r; j++)
    {
        if (A[j] < x) swap(&A[i++],&A[j]);
    }
    swap(&A[i],&A[j]);
    
    Printf(i,A);
} 

int  main(void){
    int i,A[MAX];
    
    scanf("%d",&n);
    for(i = 0 ; i < n ; i++) scanf("%d",&A[i]);
    
    Partirion(0,n-1,A);
    return 0;
}



Compiler output:
/usr/bin/ld: /tmp/cc97nWc0.o: in function `Partirion':
main.c:(.text+0x137): undefined reference to `swap'
/usr/bin/ld: main.c:(.text+0x176): undefined reference to `swap'
collect2: error: ld returned 1 exit status
Language: C

#include <stdio.h>

#define MAX 10000

void swap(int* a,int* b)
{
    int temp = *a;
    *a = *b;
    *b = temp;
}

void Partirion(int l,int r,int* A)
{
    int x = A[r];
    int i = l, j;
    
    for(j = l; j < r; j++)
    {
        if (A[j] <= x) swap(&A[i++],&A[j]);
    }
    swap(&A[i],&A[j]);
    
    for(j = 0;  j < n; j++)
    {
        if(j != 0) printf(" ");
        if(j == i) printf("[%d]",A[j]);
        else printf("%d",A[j]);
    }
    printf("\n");
} 

int  main(void){
    int i,A[MAX];
    
    scanf("%d",&n);
    for(i = 0 ; i < n ; i++) scanf("%d",&A[i]);
    
    Partirion(0,n-1,A);
    return 0;
}



Compiler output:
main.c: In function 'Partirion':
main.c:23:21: error: 'n' undeclared (first use in this function)
   23 |     for(j = 0;  j < n; j++)
      |                     ^
main.c:23:21: note: each undeclared identifier is reported only once for each function it appears in
main.c: In function 'main':
main.c:35:17: error: 'n' undeclared (first use in this function)
   35 |     scanf("%d",&n);
      |                 ^
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(){
  int i,q;

  sanf("%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) printf(" ");
    if(i == q) printf("[");
    printf("%d",A[i]);
    if(i == q) printf("]");
  }

  printf("\n");

  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:28:3: error: implicit declaration of function 'sanf'; did you mean 'scanf'? [-Wimplicit-function-declaration]
   28 |   sanf("%d",&n);
      |   ^~~~
      |   scanf
Language: C

#include<stdio.h>

#define SENTINEL 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]=r;
  return i+1
}
int main(){
  int i,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)printf(" ");
    if(i==q)printf("[");
    printf("%d",A[i]);
    if(i==q)printf("]");
  }
  printf("\n");
  return 0;
}



Compiler output:
main.c:5:7: error: 'MAX' undeclared here (not in a function)
    5 | int A[MAX],n;
      |       ^~~
main.c: In function 'partition':
main.c:22:13: error: expected ';' before '}' token
   22 |   return i+1
      |             ^
      |             ;
   23 | }
      | ~            
main.c: In function 'main':
main.c:31:21: error: expected ';' before 'for'
   31 |   q=partition(0,n-1)
      |                     ^
      |                     ;
   32 |   for(i=0;i<n;i++){
      |   ~~~
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]=r;
  return i+1
}
int main(){
  int i,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)printf(" ");
    if(i==q)printf("[");
    printf("%d",A[i]);
    if(i==q)printf("]");
  }
  printf("\n");
  return 0;
}



Compiler output:
main.c: In function 'partition':
main.c:22:13: error: expected ';' before '}' token
   22 |   return i+1
      |             ^
      |             ;
   23 | }
      | ~
Language: C

#include <stdio.h>

int partition(int [], int, int);

int main(){
  int n,a[100000],key;
  int i,j;
  
  scanf("%d",&n);
  for(i=1; i<=n; i++){
    scanf("%d",&a[i]);
  }
  
  key = a[n];
  i = 1;
  partition(a,i,n);
  
  for(i=1; i <= n; i++){
    
    if(a[i] == key){
      printf("[%d]",a[i]);
    }
    else printf("%d",a[i]);

    if((i >= 1) && (i < n))
      printf(" ");
  }
  printf("\n");
  
  return 0;
}

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

      printf("A

Compiler output:
main.c: In function 'partition':
main.c:44:14: warning: missing terminating " character
   44 |       printf("A
      |              ^
main.c:44:14: error: missing terminating " character
   44 |       printf("A
      |              ^~
main.c:44:7: error: expected expression at end of input
   44 |       printf("A
      |       ^~~~~~
main.c:44:7: error: expected declaration or statement at end of input
main.c:44:7: error: expected declaration or statement at end of input
main.c:44:7: error: expected declaration or statement at end of input
Language: C

#include <stdio.h>

int partition(int, int);

int a[100000];

int main(){
  int n,a[100000],key;
  int i,j;
  
  scanf("%d",&n);
  for(i=1; i<=n; i++){
    scanf("%d",&a[i]);
  }
  
  key = a[n];
  i = 1;
  partition(i,n);
  
  for(i=1; i <= n; i++){
    
    if(a[i] == key){
      printf("[%d]",a[i]);
    }
    else printf("%d",a[i]);

    if((i >= 1) && (i < n))
      printf(" ");
  }
  printf("\n");
  
  return 0;
}

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

  for(j=p; j <= r-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:35:5: error: conflicting types for 'partition'; have 'int(int *, int,  int)'
   35 | int partition(int A[], int p, int r){
      |     ^~~~~~~~~
main.c:3:5: note: previous declaration of 'partition' with type 'int(int,  int)'
    3 | int partition(int, int);
      |     ^~~~~~~~~