Windows 下C++ 利用管道通信获得子进程的输出

下面是父进程的代码，注意创建管道时CreatePipe（）函数的第三个参数一定要有，否则从管道中度不输数据

#include 
#include 
#include 
using namespace std;
int main()
{
	STARTUPINFO si = {0};
	PROCESS_INFORMATION pi = {0};
	char ReadBuff[100] = {0};
	DWORD ReadNum = 0;
	HANDLE hRead = NULL;
	HANDLE hWrite = NULL;
	SECURITY_ATTRIBUTES sa = {0};
	sa.nLength = sizeof(sa);
	sa.bInheritHandle = TRUE;
	sa.lpSecurityDescriptor = 0;
	BOOL bRet = CreatePipe(&hRead,&hWrite,&sa,0);
	if(bRet == TRUE)
	{
		cout << "管道创建成功"  << endl;
	}
	else
	{
		cout << "创建管道失败，错误代码为：" << GetLastError() << endl;
	}
	HANDLE hTemp = GetStdHandle(STD_OUTPUT_HANDLE);
	SetStdHandle(STD_OUTPUT_HANDLE,hWrite);

	GetStartupInfo(&si);//获取本进程当前的STARTUPINFO结构信息
	si.cb = sizeof(STARTUPINFO);
	si.wShowWindow = SW_HIDE;
	si.dwFlags = STARTF_USESHOWWINDOW|STARTF_USESTDHANDLES;
	//si.hStdInput = hRead;
	si.hStdError = hWrite;
	si.hStdOutput = hWrite;

	bRet = CreateProcess(NULL,"Child.exe",NULL,NULL,TRUE,NULL,NULL,NULL,&si,&pi);
	SetStdHandle(STD_OUTPUT_HANDLE,hTemp);
	if(bRet == TRUE)
	{
		cout << "成功创建子进程" << endl;
	}
	else
	{
		cout << "创建子进程失败，错误代码为 ：" << GetLastError() << endl;
	}
	CloseHandle(hWrite);
	while(ReadFile(hRead,ReadBuff,100,&ReadNum,NULL))
	{
		ReadBuff[ReadNum] = '\0';
		cout << "从管道中读到的内容" << ReadBuff << "共" << ReadNum << "字节数据" << endl;
	}
	cin.get();
	return 0;
}

下面是子进程代码：只要在子进程中随意的输出一些东西就可以被父进程获取到

#include 
using namespace std;
int main()
{
	cout << "6666666666666666666" << endl;
    cout << "Child send to Parent" << endl;
	return 0;
}