How to get a command line output called by a c++ program and do an action depending of the result

I whant to build a little C++ console application (with code block) for launch a command in command line get the result of this command (showed in the cmd window) then do an action depending of the result

It's only for Windows OS

For exemple:

ShellExecute(0, "open", "cmd.exe", "/C command1", 0, SW_HIDE);

if command1 return value1 do function1 else do function2

return 0