#include <windows.h>
#include <string>
#include <stdexcept>
#include <bits/stdc++.h>

#include <string>
#include <stdexcept>

#ifdef _WIN32
#include <windows.h>
#else
#include <cstdio>
#include <memory>
#include <array>
#endif

std::string getans(const std::string& command) {
	std::string result;
	
#ifdef _WIN32
	// Windows实现
	HANDLE hPipeRead, hPipeWrite;
	SECURITY_ATTRIBUTES sa = {sizeof(SECURITY_ATTRIBUTES)};
	sa.bInheritHandle = TRUE;
	sa.lpSecurityDescriptor = NULL;
	
	if (!CreatePipe(&hPipeRead, &hPipeWrite, &sa, 0))
		throw std::runtime_error("CreatePipe failed");
	
	STARTUPINFOW si = {sizeof(STARTUPINFOW)};
	si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
	si.hStdOutput = hPipeWrite;
	si.hStdError = hPipeWrite;
	si.wShowWindow = SW_HIDE;
	
	PROCESS_INFORMATION pi = {0};
	std::wstring wcommand(command.begin(), command.end());
	
	if (!CreateProcessW(NULL, &wcommand[0], NULL, NULL, TRUE, 
		CREATE_NO_WINDOW, NULL, NULL, &si, &pi))
	{
		CloseHandle(hPipeWrite);
		CloseHandle(hPipeRead);
		throw std::runtime_error("CreateProcess failed");
	}
	
	CloseHandle(hPipeWrite);
	
	char buffer[4096];
	DWORD bytesRead;
	while (ReadFile(hPipeRead, buffer, sizeof(buffer), &bytesRead, NULL) && bytesRead) {
		result.append(buffer, bytesRead);
	}
	
	CloseHandle(hPipeRead);
	WaitForSingleObject(pi.hProcess, INFINITE);
	CloseHandle(pi.hProcess);
	CloseHandle(pi.hThread);
#else
	// Linux/Unix实现
	std::array<char, 128> buffer;
	std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(command.c_str(), "r"), pclose);
	if (!pipe) {
		throw std::runtime_error("popen() failed");
	}
	while (fgets(buffer.data(), buffer.size(), pipe.get()) != nullptr) {
		result += buffer.data();
	}
#endif
	
	return result;
}


#include<unistd.h>
using namespace std;
int main(){
	string ft,lw;
	cout<<"需要测试的代码:";
	cin>>ft;
	cout<<"输出正解的代码:";
	cin>>lw;
	string a1="g++.exe \""+ft+"\" -o "+"1.exe";
	string a2="g++.exe \""+lw+"\" -o "+"2.exe";
	cout<<"编译命令:\n"<<a1<<"\n"<<a2<<endl;
	system(a1.c_str());
	system(a2.c_str());
	srand(time(0));
	system("cls");
	cout<<"开始测试";
	Sleep(500);
	cout<<".";
	Sleep(500);
	cout<<".";
	Sleep(500);
	cout<<".";
	Sleep(500);
	cout<<".";
	Sleep(500);
	cout<<".";
	int k=1;
	while(k){
		system("cls");
		int x1=rand()%1000,x2=x1+rand()%100000;
		string t1="1.exe "+to_string(x1)+" "+to_string(x2),t2="2.exe "+to_string(x1)+" "+to_string(x2);
		cout<<"命令:\n"<<t1<<"\n"<<t2<<endl;
		string a=getans(t1),b=getans(t2);
		if(a!=b){
			cout<<"Break at:\n"<<x1<<" "<<x2<<"\n----------\nOutput1:\n"<<a<<"\n----------\nOutput2:\n"<<b;
			break;
		}
		cout<<"成功次数:"<<k++;
	}
}

修改$105$行即可.