方法1：使用win32 api函数

	PCTSTR    str1 = TEXT("123456789");
	AllocConsole();
	HANDLE  HConsole   =  GetStdHandle(STD_OUTPUT_HANDLE);
	WriteConsole(HConsole, str1, 9, NULL, NULL);

https://learn.microsoft.com/zh-cn/windows/console/writeconsole

方法2：重定向输入输出

	AllocConsole();
	FILE* stream;
	_tfreopen_s(&stream,TEXT("CONOUT$"), TEXT("w"), stdout);//tchar.h
	cout << "This is a test info" << endl;

https://learn.microsoft.com/zh-cn/cpp/c-runtime-library/reference/freopen-s-wfreopen-s?view=msvc-170

https://www.cnblogs.com/MuSmile/p/5245744.html