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

#include <iostream>
using namespace std;
int main(){
  double n,ans;
  cin>>n;
  if(n==1){
    ans=n;
  }
  else {
    if(n%2==0){
    ans=n/2;
  }
  else if(n%2!=0){
    ans=(n+1)/2;
  }
  }
  cout<<ans/n<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   10 |     if(n%2==0){
      |        ~^~
      |        | |
      |        | int
      |        double
a.cc:13:12: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   13 |   else if(n%2!=0){
      |           ~^~
      |           | |
      |           | int
      |           double
Language: C

#include<stdio.h>
 
int main(){
  double ans,N;
  
  scanf("%lf \n",&N);
  
  if(N%2.0 == 0){
    ans = 1.0/2.0;
    printf("%lf",ans);
  }
  else{
    ans =(N+1)/(2.0*N);
    printf("%lf",ans);
    
  }
  
  return 0;
  
}

Compiler output:
main.c: In function 'main':
main.c:8:7: error: invalid operands to binary % (have 'double' and 'double')
    8 |   if(N%2.0 == 0){
      |       ^
Language: C

#include<stdio.h>
int main(){
  int n;
  double a;
  scanf("%d",&n);
  if((double)n%2 == 0)
    printf("%lf\n",((n/2)/2));
  else
    a=((n/2)+1)/n;
    printf("%lf\n",((n/2)+1)/n));
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:15: error: invalid operands to binary % (have 'double' and 'int')
    6 |   if((double)n%2 == 0)
      |      ~~~~~~~~~^
      |      |
      |      double
main.c:10:32: error: expected ';' before ')' token
   10 |     printf("%lf\n",((n/2)+1)/n));
      |                                ^
      |                                ;
main.c:10:32: error: expected statement before ')' token
Language: C++

#include <iostream>
using namespace std;
int main(){
  double n,ans;
  cin>>n;
  if(n==1){
    ans=n;
  }
  else {
    if(n%2==0){
    ans=n/2;
  }
  else if(n%2!=0){
    ans=(n+1)/2;
  }
  }
  cout<<ans/n<<endl;
  return 0;
}
#include <iostream>
using namespace std;
int main(){
  double n,ans;
  cin>>n;
  if(n%2==0){
    ans=n/2;
  }
  else if(n%2!=0){
    ans=(n+1)/2;
  }
  cout<<ans/n<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   10 |     if(n%2==0){
      |        ~^~
      |        | |
      |        | int
      |        double
a.cc:13:12: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   13 |   else if(n%2!=0){
      |           ~^~
      |           | |
      |           | int
      |           double
a.cc: At global scope:
a.cc:22:5: error: redefinition of 'int main()'
   22 | int main(){
      |     ^~~~
a.cc:3:5: note: 'int main()' previously defined here
    3 | int main(){
      |     ^~~~
a.cc: In function 'int main()':
a.cc:25:7: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   25 |   if(n%2==0){
      |      ~^~
      |      | |
      |      | int
      |      double
a.cc:28:12: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   28 |   else if(n%2!=0){
      |           ~^~
      |           | |
      |           | int
      |           double
Language: C++

int main(void)
{
int N;
if(N/2==0){
  print(2/1)
}else{
  print(((N-1)/2)/N)
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'print' was not declared in this scope; did you mean 'int'?
    5 |   print(2/1)
      |   ^~~~~
      |   int
a.cc:7:3: error: 'print' was not declared in this scope; did you mean 'int'?
    7 |   print(((N-1)/2)/N)
      |   ^~~~~
      |   int
a.cc:8:2: error: expected '}' at end of input
    8 | }
      |  ^
a.cc:2:1: note: to match this '{'
    2 | {
      | ^
Language: C

#include<stdio.h>
 
int main(){
  double ans,N;
  
  scanf("%lf \n",&N);
  
  if(N%2 == 0){
    ans = 1/2;
    printf("%lf",ans);
  }
  else{
    ans =(N+1)/(2*N);
    printf("%lf",ans);
    
  }
  
  return 0;
  
}

Compiler output:
main.c: In function 'main':
main.c:8:7: error: invalid operands to binary % (have 'double' and 'int')
    8 |   if(N%2 == 0){
      |       ^
Language: Java

public static void Main(String[] args) {
		Scanner scan=new Scanner(System.in);
		int N;
		N=scan.nextInt();
		int kisu;
		kisu=N/2;
		if(N%2==1)kisu++;
		double A;
		A=(double)kisu/(double)N;
		System.out.print(A);
		
		
	}

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
public static void Main(String[] args) {
              ^
  (use --enable-preview to enable unnamed classes)
1 error
Language: C++

#include<iostream>

using namespace std;

int main(){
    int n, count = 0;
    cin >> n;
    for(int i = 1; i <= n; i++){
        if(i % 2 == 1) count++;
    }
    cout << (double)count / n  endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:30: error: expected ';' before 'endl'
   11 |     cout << (double)count / n  endl;
      |                              ^ ~~~~
      |                              ;
Language: C++

include<bits/stdc++.h>
using namespace std;
int main(){
  int n;
  double c=0,j=0;
  cin>>n;
  while(n!=0){
    if(n%2!=0){
      j++;
    }
    else{
      j+=0;
    }
  }
  c=j/(double)n;
  cout<<c<<'\n';
  return 0;
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include<bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin>>n;
      |   ^~~
a.cc:16:3: error: 'cout' was not declared in this scope
   16 |   cout<<c<<'\n';
      |   ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int N; cin>>N;
  float X;
  if(N%2==0){
    X=1/2;
  }
  else{
    X=(N+1)/2N;
  }
  cout<<setprecision(11)<<X<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:13: error: unable to find numeric literal operator 'operator""N'
   10 |     X=(N+1)/2N;
      |             ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  double N; cin >> N;
  
  if (N % 2 == 0) {
    cout << 0.5000000000;
  }
  else {
    cout << ((N + 1) / 2) / N;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    7 |   if (N % 2 == 0) {
      |       ~ ^ ~
      |       |   |
      |       |   int
      |       double
Language: C

#include<stdio.h>
int main(){
  double n;
  double a;
  scanf("%lf",&n);
  if(n%2.0 == 0)
    printf("%lf\n",((n/2)/2);
  else
    a=((n/2)+1)/n;
    printf("%lf\n",((n/2)+1)/n);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:7: error: invalid operands to binary % (have 'double' and 'double')
    6 |   if(n%2.0 == 0)
      |       ^
main.c:7:29: error: expected ')' before ';' token
    7 |     printf("%lf\n",((n/2)/2);
      |           ~                 ^
      |                             )
main.c:11:12: error: expected ';' before '}' token
   11 |   return 0;
      |            ^
      |            ;
   12 | }
      | ~
Language: C++

#include<bits/stdc++.h>
using namespace std;

int main{
  int N;
  cin >> N;
  double P;
  if(N%2 == 0){
    P = 1/2;
  }
  if(N%2 == 1){
    P = (N+1)/(2*N);
  }
  cout << P << endl;
}

Compiler output:
a.cc:4:5: error: cannot declare '::main' to be a global variable
    4 | int main{
      |     ^~~~
a.cc:5:3: error: expected primary-expression before 'int'
    5 |   int N;
      |   ^~~
a.cc:5:3: error: expected '}' before 'int'
a.cc:4:9: note: to match this '{'
    4 | int main{
      |         ^
a.cc:6:3: error: 'cin' does not name a type
    6 |   cin >> N;
      |   ^~~
a.cc:8:3: error: expected unqualified-id before 'if'
    8 |   if(N%2 == 0){
      |   ^~
a.cc:11:3: error: expected unqualified-id before 'if'
   11 |   if(N%2 == 1){
      |   ^~
a.cc:14:3: error: 'cout' does not name a type
   14 |   cout << P << endl;
      |   ^~~~
a.cc:15:1: error: expected declaration before '}' token
   15 | }
      | ^
Language: C

#include<stdio.h>
 
int main(){
  float ans,N;
  
  scanf("%f \n",&N);
  
  if(N%2 == 0){
    ans = 1/2;
    printf("%f",ans);
  }
  else{
    ans =(N+1)/(2*N);
    printf("%f",ans);
    
  }
  
  return 0;
  
}

Compiler output:
main.c: In function 'main':
main.c:8:7: error: invalid operands to binary % (have 'float' and 'int')
    8 |   if(N%2 == 0){
      |       ^
Language: C

#include<stdio.h>

int main(){
  double ans,N;
  
  scanf("%f \n",&N);
  
  if(N%2 == 0){
    ans = 1/2;
    printf("%f",ans);
  }
  else{
    ans =(N+1)/(2*N);
    printf("%f",ans);
    
  }
  
  return 0;
  
}


Compiler output:
main.c: In function 'main':
main.c:8:7: error: invalid operands to binary % (have 'double' and 'int')
    8 |   if(N%2 == 0){
      |       ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int N;

  // 変数Nで入力を受け取る
  cin >> N;
  
  
  int a;
  
  a==N/2
    
   double kakuritu;
  a==N/2;
  kakuritu == a / N;

  cout << kakuritu << endl;
  return 0;
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:9: error: expected ';' before 'double'
   13 |   a==N/2
      |         ^
      |         ;
   14 | 
   15 |    double kakuritu;
      |    ~~~~~~
a.cc:17:3: error: 'kakuritu' was not declared in this scope
   17 |   kakuritu == a / N;
      |   ^~~~~~~~
Language: Java

import java.util.Scanner;

public class OddsOfOddness
{
    public static void main(String[] args)
    {
        Scanner read = new Scanner(System.in);
        int n = read.nextInt();
        float oddcount = 0;
        float answer =0;
        for (int i=1;i<=n;i++)
        {
            if (i%2!=0)
            {
                oddcount++;
            }
        }
        answer = oddcount/n;
        System.out.println(answer);
    }
}


Compiler output:
Main.java:3: error: class OddsOfOddness is public, should be declared in a file named OddsOfOddness.java
public class OddsOfOddness
       ^
1 error
Language: C

#include<stdio.h>
int main(){
  double n;
  double a;
  scanf("%lf",&n);
  if(n%2 == 0)
    printf("%lf\n",((n/2)/2);
  else
    a=((n/2)+1)/n;
    printf("%lf\n",((n/2)+1)/n);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:7: error: invalid operands to binary % (have 'double' and 'int')
    6 |   if(n%2 == 0)
      |       ^
main.c:7:29: error: expected ')' before ';' token
    7 |     printf("%lf\n",((n/2)/2);
      |           ~                 ^
      |                             )
main.c:11:12: error: expected ';' before '}' token
   11 |   return 0;
      |            ^
      |            ;
   12 | }
      | ~
Language: Java

import java.util.Scanner;

public class Main1{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    double p = 0;    //入力された値Nまでの奇数の個数

    int num = sc.nextInt();
    for(int i = 0; i <= num; i++){
      if((i % 2) == 1){
        p++;
      }
    }

    System.out.printf("%.10f \n" , p/num);
  }
}

Compiler output:
Main.java:3: error: class Main1 is public, should be declared in a file named Main1.java
public class Main1{
       ^
1 error
Language: C++

int main() {
    int n;
    int a,b;
    cin >> n;

    a = n/2;
    b = n%2; 

    if (b!=1)
    {
        cout << (a+1)/double(n) << endl;
    }
    else
    {
        cout << a/double(n) << endl;
    }
    


    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:5: error: 'cin' was not declared in this scope
    4 |     cin >> n;
      |     ^~~
a.cc:11:9: error: 'cout' was not declared in this scope
   11 |         cout << (a+1)/double(n) << endl;
      |         ^~~~
a.cc:11:36: error: 'endl' was not declared in this scope
   11 |         cout << (a+1)/double(n) << endl;
      |                                    ^~~~
a.cc:15:9: error: 'cout' was not declared in this scope
   15 |         cout << a/double(n) << endl;
      |         ^~~~
a.cc:15:32: error: 'endl' was not declared in this scope
   15 |         cout << a/double(n) << endl;
      |                                ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
 int main() {
  double N; 
    cin >> N ;
  if (N % 2 == 0){
    cout << 1 / 2 <<endl;
  }
  else{
    cout << (N/2+1)/N <<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    7 |   if (N % 2 == 0){
      |       ~ ^ ~
      |       |   |
      |       |   int
      |       double
Language: C

#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <limits.h>
#include <math.h>
int acs(const void *a, const void *b){return *(int*)a - *(int*)b;} /* 1,2,3,4.. */
int des(const void *a, const void *b){return *(int*)b - *(int*)a;} /* 8,7,6,5.. */
int cmp_char(const void *a, const void *b){return *(char*)a - *(char*)b;} /* a,b,c,d.. */
int cmp_str(const void *a, const void *b){return strcmp(*(const char **)a, *(const char **)b);} /* aaa,aab.. */
#define min(a,b) (a < b ? a: b)
#define max(a,b) (a > b ? a: b)

int main(void) {
  int n;
  scanf("%d", &n);
  int a = n / 2 + 1;
  double ans = (double)a / (double)n
  printf("%f\n", ans);
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:20:3: error: expected ',' or ';' before 'printf'
   20 |   printf("%f\n", ans);
      |   ^~~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int n;cin>>n;
  if(n%2==0)cout<<0.5<<endl;
  else{
    double a=n+1;
    a/=(n*2);
    ocut<<a<<endl;
  }
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'ocut' was not declared in this scope
    9 |     ocut<<a<<endl;
      |     ^~~~
Language: C

#include<stdio.h>

int main(void)
{
  int N;
  scanf("%d",&N);
  if(N == 1){
    printf("%d",N);
  }
  else if{
    printf("%d",((N +1)/2)/N);
  }
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:10: error: expected '(' before '{' token
   10 |   else if{
      |          ^
      |          (
Language: C++

#include <iostream>
using namespace std;

int main() {
 	float n;
	cin >> n;
	float a;
	float b;
	if(n % 2.0 == 0){
		a = n / 2;
	}else{
		a = n / 2 + 1;
	}
	b = n / a;
	cout << b << '\n';
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: invalid operands of types 'float' and 'double' to binary 'operator%'
    9 |         if(n % 2.0 == 0){
      |            ~ ^ ~~~
      |            |   |
      |            |   double
      |            float
Language: C++

#include<bits/stdc++.h>
#define rep(i,n)for(int i=0;i<n;++i)
#include<string>
using namespace std;
typedef long long ll;
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }

int main() {
	double n;
	cin >> n;
	if (n % 2.0 == 0)cout << 0.5 << endl;
	else cout << 0.5 + 1 / n << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:15: error: invalid operands of types 'double' and 'double' to binary 'operator%'
   12 |         if (n % 2.0 == 0)cout << 0.5 << endl;
      |             ~ ^ ~~~
      |             |   |
      |             |   double
      |             double
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
 int main() {
  double N; 
    cin >> N ;
  if (N % 2.0 == 0){
    cout << 1 / 2 <<endl;
  }
  else{
    cout << (N/2+1)/N <<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: invalid operands of types 'double' and 'double' to binary 'operator%'
    7 |   if (N % 2.0 == 0){
      |       ~ ^ ~~~
      |       |   |
      |       |   double
      |       double
Language: C

#include<stdio.h>

int main(void)
{
  int N;
  scanf("%d",&N);
  if(N == 1){
    printf("%d",N);
  }
  else if{
    printf("%d",(N - N/2)/N);
    }
  else {
    printf("%d",(N + 1 -N/2)/N);
  }
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:10: error: expected '(' before '{' token
   10 |   else if{
      |          ^
      |          (
Language: C++

#include <iostream>
 
int main(void)
{
  cin>>N;
  if(0 == N%2)
  {
    return 0.5;
  }
  else
  {
    return (N/2+1)/(double)N;
  }
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   cin>>N;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:5:8: error: 'N' was not declared in this scope
    5 |   cin>>N;
      |        ^
Language: C++

#include<bits/stdc++.h>
#define rep(i,n)for(int i=0;i<n;++i)
#include<string>
using namespace std;
typedef long long ll;
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }

int main() {
	double n;
	cin >> n;
	if (n % 2 == 0)cout << 0.5 << endl;
	else cout << 0.5 + 1 / n << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:15: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   12 |         if (n % 2 == 0)cout << 0.5 << endl;
      |             ~ ^ ~
      |             |   |
      |             |   int
      |             double
Language: C++

#include <bits/stdc++.h>
#include <iostream>
using namespace std;
 
int main() {
  double N,F;
  cin>>N;
  F=N+1;
  if(N%2==0){
    cout<<0.5<<endl;
  }
  else{
    cout<<(F/2)/N<<endl;
  }  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    9 |   if(N%2==0){
      |      ~^~
      |      | |
      |      | int
      |      double
Language: C

#include<stdio.h>

int main(void)
{
  int N;
  scanf("%d",&N);
  if(N == 1){
    printf("%d",N);
  }
  else if{
    printf("%d",(N - N/2)/N);
    }
  else {
    printf("%d",(N + 1 -N/2)/n);
  }
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:10: error: expected '(' before '{' token
   10 |   else if{
      |          ^
      |          (
main.c:14:30: error: 'n' undeclared (first use in this function)
   14 |     printf("%d",(N + 1 -N/2)/n);
      |                              ^
main.c:14:30: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include<bits/stdc++.h>
#define rep(i,n)for(int i=0;i<n;++i)
#include<string>
using namespace std;
typedef long long ll;
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }

int main() {
	double n;
	if (n % 2 == 0)cout << 0.5 << endl;
	else cout << 0.5 + 1 / n << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:15: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   11 |         if (n % 2 == 0)cout << 0.5 << endl;
      |             ~ ^ ~
      |             |   |
      |             |   int
      |             double
Language: C

#include<stdio.h>

int main(void)
{
  int N;
  scanf("%d",&N);
  if(N == 1){
    printf("%d",N);
  }
  else if{
    printf("%d",(N - N/2)/N);
    }
  else {
    printf("%d",(N + 1 -N/2)/n)
  }
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:10: error: expected '(' before '{' token
   10 |   else if{
      |          ^
      |          (
main.c:14:30: error: 'n' undeclared (first use in this function)
   14 |     printf("%d",(N + 1 -N/2)/n)
      |                              ^
main.c:14:30: note: each undeclared identifier is reported only once for each function it appears in
main.c:14:32: error: expected ';' before '}' token
   14 |     printf("%d",(N + 1 -N/2)/n)
      |                                ^
      |                                ;
   15 |   }
      |   ~
Language: C++

#include <iostream>
#include <bits/stdc++.h>

using namespace std;

int main() {
  int n
  cin >> n;
  int ans;
  if(n%2 == 0){
    ans = n/(2*n);
  }
  else {
    ans = (n+1)/(2*n);
  }
  
  
  cout << ans << endl;
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: expected initializer before 'cin'
    8 |   cin >> n;
      |   ^~~
a.cc:10:6: error: 'n' was not declared in this scope; did you mean 'yn'?
   10 |   if(n%2 == 0){
      |      ^
      |      yn
Language: C++

include<bits/stdc++.h>
using namespace std;
int main(){
  int n;
  double c=0,j=0;
  cin>>n;
  while(n!=0){
    if(n%2!=0){
      j++;
    }
    else{
      j+=0;
    }
  }
  c=j/((double)n);
  cout<<c<<'\n';
  return 0;
}


Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include<bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin>>n;
      |   ^~~
a.cc:16:3: error: 'cout' was not declared in this scope
   16 |   cout<<c<<'\n';
      |   ^~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
 	float n;
	cin >> n;
	float a;
	float b;
	if(n % 2 == 0){
		a = n / 2;
	}else{
		a = n / 2 + 1;
	}
	b = n / a;
	cout << b << '\n';
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: invalid operands of types 'float' and 'int' to binary 'operator%'
    9 |         if(n % 2 == 0){
      |            ~ ^ ~
      |            |   |
      |            |   int
      |            float
Language: C

#include <stdio.h>
int main(void){
  int a,N;
scanf("%d",&N);
if((N%2)==o){a=0;}
  else a=((N+1)/2)/N;
  printf(%d,a);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:11: error: 'o' undeclared (first use in this function)
    5 | if((N%2)==o){a=0;}
      |           ^
main.c:5:11: note: each undeclared identifier is reported only once for each function it appears in
main.c:7:10: error: expected expression before '%' token
    7 |   printf(%d,a);
      |          ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
 double main() {
  double N; 
    cin >> N ;
  if (N % 2 == 0){
    cout << 1 / 2 <<endl;
  }
  else{
    cout << (N/2+1)/N <<endl;
  }
}

Compiler output:
a.cc:4:2: error: '::main' must return 'int'
    4 |  double main() {
      |  ^~~~~~
a.cc: In function 'int main()':
a.cc:7:9: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    7 |   if (N % 2 == 0){
      |       ~ ^ ~
      |       |   |
      |       |   int
      |       double
Language: C

#include<stdio.h>

int main(){
  
  int N;
  
  scanf("%d",&N);
  
  if(N%2==0){
    printf("0,5");
  }else if(N==1){
    printf("1");
  }else(){
    printf("0.6");
  }
  
  return 0;
  
}

Compiler output:
main.c: In function 'main':
main.c:13:9: error: expected expression before ')' token
   13 |   }else(){
      |         ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
 double main() {
  int N; 
    cin >> N ;
  if (N % 2 == 0){
    cout << 1 / 2 <<endl;
  }
  else{
    cout << (N/2+1)/N <<endl;
  }
}

Compiler output:
a.cc:4:2: error: '::main' must return 'int'
    4 |  double main() {
      |  ^~~~~~
Language: Java

import java.util.Scanner;
import java.util.*;
public class Solution
{
  public static void main(String args[])
  {
    Scanner sc=new Scanner(System.in);
    int n,temp;
    n=sc.nextInt();
    if(n%2!=0)
    temp=n+1;
    else 
    temp=n;
    double poss=temp/2;
    poss/=n;
    System.out.printf("%.10f",poss);
  }
}

Compiler output:
Main.java:3: error: class Solution is public, should be declared in a file named Solution.java
public class Solution
       ^
1 error
Language: C++

#include <bits/stdc++.h>
#include <iostream>
using namespace std;
 
int main() {
  int N,F;
  cin>>N;
  F=N+1;
  if(N%2==0){
    cout<<0.5<<endl;
  }
  else if{
    cout<<(F/2)/N<<endl;
  }  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:10: error: expected '(' before '{' token
   12 |   else if{
      |          ^
      |          (
Language: Java

import java.util.Scanner;

public class Main3 {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();

		double a = N / 2.0 + 0.5;
		int b = (int)a;
		double ans = (double)b/N;

		System.out.println(ans);
	}

}


Compiler output:
Main.java:3: error: class Main3 is public, should be declared in a file named Main3.java
public class Main3 {
       ^
1 error
Language: C++

using namespace std;
int main()
{
	int N;
  	cin >> N;
  	if(N%2==0)
    {
  		cout << (double)1/2;
    }
  	else
    {
    	cout << (int(N/2)+1)/(double)N;
    }
  	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'cin' was not declared in this scope
    5 |         cin >> N;
      |         ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:8:17: error: 'cout' was not declared in this scope
    8 |                 cout << (double)1/2;
      |                 ^~~~
a.cc:8:17: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:12:9: error: 'cout' was not declared in this scope
   12 |         cout << (int(N/2)+1)/(double)N;
      |         ^~~~
a.cc:12:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
    double n;
    cin >> n;
    cout << setprecision(6) << fixed;
    if(n%2 == 0){
        cout << (double)0.5;
    }else{
        cout << double(n/2+1)/n;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    8 |     if(n%2 == 0){
      |        ~^~
      |        | |
      |        | int
      |        double
Language: C++

#include <iomanip>
using namespace std;
int main()
{
	int n;
	cin>>n;
	if(n%2==0)
	{
		cout<<"0.500000"; 
	}
	else
	{
	    double s;
		int a=n/2+1;
		s=a/(double)n; 
		cout<<fixed<<setprecision(6)<<s;	
	}
	return 0;
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'cin' was not declared in this scope
    6 |         cin>>n;
      |         ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include <iomanip>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:9:17: error: 'cout' was not declared in this scope
    9 |                 cout<<"0.500000";
      |                 ^~~~
a.cc:9:17: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:16:17: error: 'cout' was not declared in this scope
   16 |                 cout<<fixed<<setprecision(6)<<s;
      |                 ^~~~
a.cc:16:17: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#include<bits/stdc++.h>
#define ALL(v) (v).begin(),(v).end()
#define REP(i,p,n) for(int i=p;i<(int)(n);++i)
#define rep(i,n) REP(i,0,n)
#define dump(a) (cerr << #a << "=" << (a) << endl)
#define DUMP(list) cout << "{ "; for(auto nth : list){ cout << nth << " "; } cout << "}" << endl;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }


using namespace std;

int main (){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int a;
    double b,c;
    cin >> a;#define ll long long

    if ( a % 2 == 0){
        b = a/(2.0);
        cout << b << endl;
    } else {
        b = a/2 + 1;
        c = (double)a;
        cout<< fixed << setprecision(10) << b / (c + 0.0)  << endl;
    }


}

Compiler output:
a.cc:18:14: error: stray '#' in program
   18 |     cin >> a;#define ll long long
      |              ^
a.cc: In function 'int main()':
a.cc:18:15: error: 'define' was not declared in this scope
   18 |     cin >> a;#define ll long long
      |               ^~~~~~
a.cc:23:7: error: 'else' without a previous 'if'
   23 |     } else {
      |       ^~~~
Language: Java

import java.util.Scanner;
import java.util.*;
public class Solution
{
  public static void main(String args[])
  {
    Scanner sc=new Scanner(System.in);
    int n,temp;
    n=sc.nextInt();
    if(n%2!=0)
    temp=n+1;
    else 
    temp=n;
    double poss=temp/2;
    poss/=n;
    System.out.printf("%.6f",poss);
  }
}

Compiler output:
Main.java:3: error: class Solution is public, should be declared in a file named Solution.java
public class Solution
       ^
1 error
Language: C++

// #include <stdio.h>
// #include <string.h>
//#include <iostream>
#include <utility>
#include <cstdio>
#include <stack>
#include <queue>
#include <algorithm>
#include <map>
#include <string>
#include <set>

using namespace std;
typedef pair<int, int> XY;// Pair型変数の宣言
    
int main()
{
    
  	int Nmax = 100000;
    char String[Nmax];
    int N;
    int i,j,k;
    int len;   // 文字列の長さ
    int flag=0;
    int t[Nmax];
    int x[Nmax];
    int y[Nmax];
/*    
    // int型スタック
    stack<int> stack;   
    stack.push(777);
    stack.push(778);
    stack.push(779);
  
	int tmpsl = stack.top();  // LAST要素の参照
 // 	int tpmsf = stack.back(); // FIRST要素の参照
 //	printf("%d %d \n",tmpsl,tmpsf);
    stack.pop();// LAST要素の削除（取出しではない）
 // 	if( stack.empty() == true) printf("empty stack\n");
     
    // int型キュー
    queue<int> que;
  	que.push(999);
  	que.push(998);   
  	que.push(997);    
  	int tmpqs = que.front(); // FIRST要素の参照
  	int tmpqe = que.back();  // LAST要素の参照
 //	printf("%d %d \n",tmpqs,tmpqe);
  	que.pop();  // FIRST要素の削除（取出しではない）
  //	if( que.empty() == true) printf("empty que\n");
    
    // ２次元座標を扱うキュー
    queue<XY> xyque; // ２次元座標型変数のキュー
  	XY p; 
  	xyque.pop();	// FIRST要素の削除。キューが空のときは削除が予約されて次のPOPが即削除される
  	xyque.push( XY(5,5) );
    xyque.push( XY(5,5) );
   	p = xyque.front();  // FIRST要素からのコピー
 // 	printf("%d %d\n", p.first, p.second);
  	
    
  que.back();
  //  sort(&(que.front()), &(que.back()));
     */   
    
      
    // 入力読込
    // 文字列
//    scanf("%s", String);   
    
    // 数列
    scanf("%d", &N);
//    for(i=1;i<=N;i++){
//        scanf("%d %d %d",&t[i],&x[i],&y[i]);
//    }
    
    // 文字列の長さをチェック
    // 文字列は配列の0からlen-1に格納されてる
//    len = strlen( String );
//  	printf("%d\n",len);
    
    // 奇数である確率
    if(N%2 ==1)
        printf("%d \n", (N/2+1)/N );
    else
         printf("%d \n", (N/2N) );
    
    /*
    // 結果出力
    if(N%2 == 1)
        printf("NO \n");
    else
        printf("YES \n");
        
  */
    
  return 0;
   
}

Compiler output:
a.cc: In function 'int main()':
a.cc:86:29: error: unable to find numeric literal operator 'operator""N'
   86 |          printf("%d \n", (N/2N) );
      |                             ^~
Language: C++

#include<bits/stdc++.h>
using namespace std;
//#define int long long
#define fo(a,b) for(int a=0;a<b;a++)
#define Sort(a) sort(a.begin(),a.end())
#define rev(a) reverse(a.begin(),a.end())

 int main ()
 {
   int n;
   cin>>n;
   double b=(n+1)/2
   if(n%2==0)
     cout<<0.5<<endl;
   else
     cout<<b/n<<endl;
 }
   
   
   


Compiler output:
a.cc: In function 'int main()':
a.cc:13:4: error: expected ',' or ';' before 'if'
   13 |    if(n%2==0)
      |    ^~
a.cc:15:4: error: 'else' without a previous 'if'
   15 |    else
      |    ^~~~
Language: C

#include<stdio.h>

int main(void)
{
  int N;
  scanf("%d",&N);
  if(N == 1){
    pritntf("%d",N);
  }
  else{
    print("%d",(N - N/2)/N);
    }
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:5: error: implicit declaration of function 'pritntf'; did you mean 'printf'? [-Wimplicit-function-declaration]
    8 |     pritntf("%d",N);
      |     ^~~~~~~
      |     printf
main.c:11:5: error: implicit declaration of function 'print'; did you mean 'printf'? [-Wimplicit-function-declaration]
   11 |     print("%d",(N - N/2)/N);
      |     ^~~~~
      |     printf
Language: C++

#include <iostream>
using namespace std;
 
int main() {
  int N;
  cin>>N;
  if(N%2==0){
    cout<<0.5<<endl;
  }
  else if{
    cout<<((1+N)/2)/N<<endl;
  }  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:10: error: expected '(' before '{' token
   10 |   else if{
      |          ^
      |          (
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N; 
    cin >> N ;
  if (N % 2 = 0){
    cout << 1 / 2 <<endl;
  }
  else{
    cout << (N/2+1)/N <<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: lvalue required as left operand of assignment
    7 |   if (N % 2 = 0){
      |       ~~^~~
Language: C++

#include <bits/stdc++.h>
#include <iostream>
using namespace std;
 
int main() {
  int N;
  cin>>N;
  if(N%2==0){
    cout<<0.5<<endl;
  }
  else if{
    cout<<((1+N)/2)/N<<endl;
  }  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:10: error: expected '(' before '{' token
   11 |   else if{
      |          ^
      |          (
Language: C++

#include <stdio.h>
#include <algorithm>
#include <cstring>
#include <cstdlib>
#include <cmath>
#include <queue>
#include <set>
#include <map>

#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define for_p(i, a, b) for(int i = a; i < b; i++)
#define for_m(i, a, b) for(int i = a - 1; i >= b; i--)

//a = s1.size();
//vector<string> s1;
//string s2 = accumulate( s1.begin(), s1.end(), string() );

using namespace std;

int main()
{
  int a = 0 , b = 0, c = 0, d = 0, e = 0, f = 0;
  int i = 0, j = 0;
  double d1 = 0, d2 = 0, d3 = 0, d4 = 0, d5 = 0, d6 = 0;
  int a1[256], a2[512], a3[1024];
  char s1[200000], s2[200000], s3[200000];
  cin >> a; 
  if(a % 2 == 0){
    d1 =  1 / 2;
  }else{
    d1 = (a / 2 + 1) / a;
  }
  cout << d1 << endl;
}
  


Compiler output:
a.cc: In function 'int main()':
a.cc:28:3: error: 'cin' was not declared in this scope
   28 |   cin >> a;
      |   ^~~
a.cc:9:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    8 | #include <map>
  +++ |+#include <iostream>
    9 | 
a.cc:34:3: error: 'cout' was not declared in this scope
   34 |   cout << d1 << endl;
      |   ^~~~
a.cc:34:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:34:17: error: 'endl' was not declared in this scope
   34 |   cout << d1 << endl;
      |                 ^~~~
a.cc:9:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    8 | #include <map>
  +++ |+#include <ostream>
    9 |
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
	unsigned int N;
  	cin >> N;
  	
  	unsigned int odd_counter=0;
  	for(int i=0; i<N; i++){
      if (i % 2 == 1){
      	odd_counter += 1;
      } 
    }
  	float output=0;
  	output = odd_counter / N
      
    cout << output << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:33: error: expected ';' before 'cout'
   15 |         output = odd_counter / N
      |                                 ^
      |                                 ;
   16 | 
   17 |     cout << output << endl;
      |     ~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int N;
  cin >> N;
  if(N%2==0)
    cout<<0.5<<endl;
  else
    double i = N
    cout<< (N+1)/(2*N) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: expected ',' or ';' before 'cout'
   10 |     cout<< (N+1)/(2*N) << endl;
      |     ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  double N;
  cin>>N;
  if(N%2==0){
    cout<<0.5<<endl;
  }
  if(N%2!=0){
    cout<<((1+N)/2)/N<<endl;
  }  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    7 |   if(N%2==0){
      |      ~^~
      |      | |
      |      | int
      |      double
a.cc:10:7: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   10 |   if(N%2!=0){
      |      ~^~
      |      | |
      |      | int
      |      double
Language: C++

#include<iostream>
using namespace std;

int main(){
double n;
cin>>n;

if(n==1) {
cout<<n;
return 0;
}
if(n%2.0==n)cout<<2/n;

else cout<<3/n;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:5: error: invalid operands of types 'double' and 'double' to binary 'operator%'
   12 | if(n%2.0==n)cout<<2/n;
      |    ~^~~~
      |    | |
      |    | double
      |    double
Language: C++

include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N; 
    cin >> N ;
  if (N % 2 = 0){
    cout << 1 / 2 <<endl;
  }
  else{
    cout << (N/2+1)/N <<endl;
  }
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:6:5: error: 'cin' was not declared in this scope
    6 |     cin >> N ;
      |     ^~~
a.cc:7:9: error: lvalue required as left operand of assignment
    7 |   if (N % 2 = 0){
      |       ~~^~~
a.cc:8:5: error: 'cout' was not declared in this scope
    8 |     cout << 1 / 2 <<endl;
      |     ^~~~
a.cc:8:21: error: 'endl' was not declared in this scope
    8 |     cout << 1 / 2 <<endl;
      |                     ^~~~
a.cc:11:5: error: 'cout' was not declared in this scope
   11 |     cout << (N/2+1)/N <<endl;
      |     ^~~~
a.cc:11:25: error: 'endl' was not declared in this scope
   11 |     cout << (N/2+1)/N <<endl;
      |                         ^~~~
Language: C++

using tup  = tuple<int, int, int>;
using vec  = vector<int>;
using vvec = vector<vec>;
// " ", ' '
// std::string str;
// str = std::to_string(int i);

// プロトタイプ宣言
// int myfunc(int, vvec);

// グローバル変数
// int N, M;
// vvec data(N, vec(M));

// 関数：

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	double N;
	double a=0.0;
	double b=0.0;
	cin>>N;
	for(int i=1;i<N+1;i++){
		if(i%2==1){
			a+=1.0;
		}
	}
	b=a/N;
		cout<<b<<endl;
	return(0);
}


Compiler output:
a.cc:1:14: error: 'tuple' does not name a type
    1 | using tup  = tuple<int, int, int>;
      |              ^~~~~
a.cc:2:14: error: 'vector' does not name a type
    2 | using vec  = vector<int>;
      |              ^~~~~~
a.cc:3:14: error: 'vector' does not name a type
    3 | using vvec = vector<vec>;
      |              ^~~~~~
a.cc: In function 'int main()':
a.cc:18:9: error: 'ios' has not been declared
   18 |         ios::sync_with_stdio(false);
      |         ^~~
a.cc:19:9: error: 'cin' was not declared in this scope
   19 |         cin.tie(0);
      |         ^~~
a.cc:30:17: error: 'cout' was not declared in this scope
   30 |                 cout<<b<<endl;
      |                 ^~~~
a.cc:30:26: error: 'endl' was not declared in this scope
   30 |                 cout<<b<<endl;
      |                          ^~~~
Language: C++

#include <iostream>
using namespace std;

int main(){
  int N;
  cin >> N;
  int n = (N+1)/2;
  double a = n / 2.0;
  cout << a << endl;
  return 0;
}#include <iostream>
using namespace std;

int main(){
  int N;
  cin >> N;
  int n = (N+1)/2;
  double a = (double)n / (double)N;
  cout << a << endl;
  return 0;
}

Compiler output:
a.cc:11:2: error: stray '#' in program
   11 | }#include <iostream>
      |  ^
a.cc:11:3: error: 'include' does not name a type
   11 | }#include <iostream>
      |   ^~~~~~~
a.cc:14:5: error: redefinition of 'int main()'
   14 | int main(){
      |     ^~~~
a.cc:4:5: note: 'int main()' previously defined here
    4 | int main(){
      |     ^~~~
Language: C++

N = input()
N = int(N)

if N ==1:
print N:
elif N%2 == 0:
    a = 0.5
    a = float(a)
elif N % 2 == 1:
    a = (N/2 + 1)/N

print a
    

Compiler output:
a.cc:1:1: error: 'N' does not name a type
    1 | N = input()
      | ^
Language: C++

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
using namespace std;
int main(){
    int N;1
    cin >> N;

    if(N % 2 == 1){
    cout << ((N+1)/2)/N << endl;
    }
    else{
    cout << 0.5000000 << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:12: error: expected ';' before 'cin'
    7 |     int N;1
      |            ^
      |            ;
    8 |     cin >> N;
      |     ~~~
Language: Java

import java.util.*;
public class Main {
	Scanner sc = new Scanner(System.in);
	int a,b,c,d,e,f,k,l,m,n,x,y,z;
	String[] S;

	Main(){a
		// 整数の入力
		n = sc.nextInt();
		double t=n/2;
		if(n%2==1)t+=1;

		// 出力
		System.out.println(t/n);
	}

	public static void main(String[] args){
		new Main();
	}
}

Compiler output:
Main.java:7: error: cannot find symbol
	Main(){a
	       ^
  symbol:   class a
  location: class Main
1 error
Language: C++

#include<cstdio>
using namespace std;

int main()
{
    int n;
    double a=0.5,b=0.6;
    while(cin>>n)
    {
        if(n==1)
            printf("%f\n",1.0);
        else if(n%2)
            printf("%f\n",b);
        else
            printf("%f\n",a);
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:11: error: 'cin' was not declared in this scope
    8 |     while(cin>>n)
      |           ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include<cstdio>
  +++ |+#include <iostream>
    2 | using namespace std;
Language: C

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

int main(){
  int a;
  cin >> a;
  if(a%2 == 0) cout << setprecision(7) << (float)1/2;
  else cout << setprecision(7) << (float)(a/2+1)/a;
  cout << endl;
  return 0;
}

Compiler output:
main.c:1:10: fatal error: iostream: No such file or directory
    1 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>

#define num_max(p,q)((p)>(q)?(p):(q))
#define num_min(p,q)((p)<(q)?(p):(q))
int cmp(const void *a, const void *b)
{
	return *(int*)a - *(int*)b;//昇順
	 //降順ならreturn *(int*)b - *(int*)a;
}
int main()
{
	int N;
	scanf("%d", &N);
	if(N%2==0)printf("0.500000000\n",);
	else printf("%lf\n", (double)((N / 2)+1) / N);
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:17:42: error: expected expression before ')' token
   17 |         if(N%2==0)printf("0.500000000\n",);
      |                                          ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main () {
  int N;
  cin >> N;
  if(N % 2 == 0){
    cout << 1.0 / 2.0 << endl;
  } else {
    cout << ((double)((N / 2) + 1))/((double) N)
  }
  else cout << 
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:49: error: expected ';' before '}' token
    9 |     cout << ((double)((N / 2) + 1))/((double) N)
      |                                                 ^
      |                                                 ;
   10 |   }
      |   ~                                              
a.cc:11:3: error: 'else' without a previous 'if'
   11 |   else cout <<
      |   ^~~~
a.cc:12:3: error: expected primary-expression before 'return'
   12 |   return 0;
      |   ^~~~~~
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);i++)
using namespace std;
typedef long long ll;

int main() {
  double N; cin >> N;
  double even=0;
  double odd=0;
  
  rep(i,N){
    if(a%2 == 0){
      odd++;
    }
    else{
      even++;
    }
  }
  cout << odd / N << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:8: error: 'a' was not declared in this scope
   12 |     if(a%2 == 0){
      |        ^
Language: C++

#include <iostream>

int main()
{
	int N;
  	cin >> N;
  	cout << (double)1/N;
  	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |         cin >> N;
      |         ^~~
      |         std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:7:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |         cout << (double)1/N;
      |         ^~~~
      |         std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

using namespace std;
 
int main() {
 
	int n;
	double odd;
	
	cin >> n;
	
	odd = ceil(n / 2.0);
	cout << odd /n << endl;
 
 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'cin' was not declared in this scope
    8 |         cin >> n;
      |         ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:10:15: error: 'ceil' was not declared in this scope
   10 |         odd = ceil(n / 2.0);
      |               ^~~~
a.cc:11:9: error: 'cout' was not declared in this scope
   11 |         cout << odd /n << endl;
      |         ^~~~
a.cc:11:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:11:27: error: 'endl' was not declared in this scope
   11 |         cout << odd /n << endl;
      |                           ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | using namespace std;
Language: C++

#include<iostream>
using namespace std;
int main()
{
    // 整数の入力
    int N;
    cin >> N;
    
  	if(N%2==0){
      cout << 1.0/2.0;
    }else{
      cout << ((N/2)+1) / static_cast<double>(N)
    }
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:49: error: expected ';' before '}' token
   12 |       cout << ((N/2)+1) / static_cast<double>(N)
      |                                                 ^
      |                                                 ;
   13 |     }
      |     ~
Language: C++

#include <iostream>

int main(){
	float N;
  	cin >> N;
  	if(N % 2 == 0) printf("%f\n", N / 2);
  	else cout << (N+1) / (2 * N) << "\n";
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |         cin >> N;
      |         ^~~
      |         std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:6:14: error: invalid operands of types 'float' and 'int' to binary 'operator%'
    6 |         if(N % 2 == 0) printf("%f\n", N / 2);
      |            ~ ^ ~
      |            |   |
      |            |   int
      |            float
a.cc:7:14: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |         else cout << (N+1) / (2 * N) << "\n";
      |              ^~~~
      |              std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C

#include <iostream>
#include <cmath>

using namespace std;

int main() {
    int n;
    cin >> n;

    cout << (round((double)n/2))/n << endl;
}


Compiler output:
main.c:1:10: fatal error: iostream: No such file or directory
    1 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

import java.util.*;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		sc.close();
		double ans = 0.0;
		int tmp  = (n + 1) / 2;
		ans = (double)tmp / (double)n;
		System.out.println(ans);
	}
}


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.*;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main {
      | ^~~~~~