摘自:http://blog.csdn.net/miyunhong/article/details/6704121
#include <io.h>
#include <fcntl.h>
void OpenConsole()
{
AllocConsole();
HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
int hCrt = _open_osfhandle((long)handle,_O_TEXT);
FILE * hf = _fdopen( hCrt, "w" );
*stdout = *hf;
}
BOOL CHappyMFCApp::InitInstance()
{
OpenConsole();
printf("asdf");
}
原文：http://www.cnblogs.com/ourran/p/5251307.html