How to pass data to scanf() without entering in the console?

[cppcook]

Hi Everybody, I need to run a command driven program in a MFC application. Then I include "WinExec("commandprogram param1 param2",SW_HIDE)" in the MFC application. The problem is the command driven program has a scanf() function, but I know the value needs to be entered and I don't want to input the value manually again. How can I pass the value to scanf() without inputing any value in the keyboard? I don't want to rewrite the function in the command driven program. Thank you very much. Gavin

[led mike]

I don't know what WinExec supports but some spawning functions support attaching to the child process IO streams so that might work for you.

[Jun Du]

Have you tried I/O redirection: "commandprogram param1 param2 < input_string" in your WinExec call? Best, Jun

[cppcook]

Thanks Jun and led. Best, Gavin