问题在这张图里一目了然

#include<iostream>
#include<cstdlib>
#include<ctime>
#include "windows.h"
using namespace std; 
int main(){
    system("g++ data.cpp -o data");
    system("g++ simple.cpp -o simple");
    system("g++ std.cpp -o std");
    for(int i=1;i<=5;i++){
    	cout<<"begin"<<endl;
		system("data.exe > pai.in");
        system("simple.exe < pai.in > 1.out");
        system("std.exe < pai.in > 2.out ");
        if(system("fc /W 1.out 2.out")){
            cout<<"Wrong Answer"<<endl;
            break;
        } 
		else 
		{
            cout<<"Accepted"<<endl;
        }
        cout<<"end"<<endl;
    }
    return 0;
}