无法从通过管道C++ (Windows)重定向的程序获取正确输出

#include <iostream>
#include <windows.h>

int main() {
    HANDLE hRead, hWrite;
    SECURITY_ATTRIBUTES sa;
    sa.nLength = sizeof(SECURITY_ATTRIBUTES);
    sa.bInheritHandle = TRUE;
    sa.lpSecurityDescriptor = NULL;

    // 创建管道
    if (!CreatePipe(&hRead, &hWrite, &sa, 0)) {
        std::cerr << "Failed to create pipe." << std::endl;
        return 1;
    }

    // 创建子进程
    STARTUPINFO si;
    PROCESS_INFORMATION pi;
    ZeroMemory(&si, sizeof(STARTUPINFO));
    si.cb = sizeof(STARTUPINFO);
    si.hStdOutput = hWrite;
    si.dwFlags |= STARTF_USESTDHANDLES;

    if (!CreateProcess(NULL, "your_program.exe", NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi)) {
        std::cerr << "Failed to create process." << std::endl;
        return 1;
    }

    // 关闭管道的写入端句柄
    CloseHandle(hWrite);

    // 从管道的读取端读取子进程的输出
    char buffer[4096];
    DWORD bytesRead;
    while (ReadFile(hRead, buffer, sizeof(buffer), &bytesRead, NULL) && bytesRead > 0) {
        std::cout.write(buffer, bytesRead);
    }

    // 关闭管道的读取端句柄
    CloseHandle(hRead);

    // 等待子进程退出
    WaitForSingleObject(pi.hProcess, INFINITE);

    // 关闭子进程的句柄
    CloseHandle(pi.hProcess);
    CloseHandle(pi.hThread);

    return 0;
}