When VS compiles and runs the code, if there is no delay or some kind of response, the window will close immediately after running
Solution a:
in the main function and getchar ()

; add system(” pause “) to the main function
Solution 3:
right-click on the project, select properties, choose the linker, selection system, in the subsystem, the console this

the above methods are debug mode, the way of carrying the shortcut Ctrl + F5
in debug mode, just set a breakpoint in the main function, then one by one to debug