C++ gui mode attach to console and redirect standard output

main.cpp

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

int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    // Attach to the parent console
    if (AttachConsole(ATTACH_PARENT_PROCESS)) {
        // Redirect stdout and stderr to the console
        freopen("CONOUT$", "w", stdout);
        freopen("CONOUT$", "w", stderr);
    }
    std::cout << "print to stdout" << std::endl;
    std::cerr << "print to stderr" << std::endl;

    return 0;
}