method:
Take the MFC dialog program as an example, add the following two lines of code to the OnInitDialog() function:
AllocConsole(); //控制台调试窗口开启
freopen("CONOUT$", "w", stdout); //开启控制台输出支持
Error message:
Severity Code Description Project File Line Suppression Status
Error C4996 'freopen': This function or variable may be unsafe. Consider using freopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
Solution:
Project--"Properties--"Configuration Properties--"C/C++--"Preprocessor--"Preprocessor Definition--"Add: _CRT_SECURE_NO_WARNINGS
Output result:
