2008/10/14, johnny_xing <johnny_xing@xxxxxxxxxxxx>: > Hi, > > Forgive me if my question is so simple as I am a newbie to programming.. > > I have two C programming and I want to call second C file within my first C > program, upon calling, I need to pass some variables (like 1 or 0) to the > second program. > > Can anyone tell me how to do? I searched system() but it seems not be able > to do this. > > Thanks & Best Regards, > > Johnny > > > -- > To unsubscribe from this list: send the line "unsubscribe > linux-c-programming" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Hi, You can use system() if you build the command-line (e.g. with sprintf()) to pass the arguments you want. Then you can access it in your 2nd program with argc/argv. An alternative is to use fork() and execve(). Please note that you have to convert each argument to a string so execve() can use it. Here again you can use sprintf() for this purpose. But are you sure you need two separate programs ? You can build 2 C files together into one binary. That makes passing variables much easier as it results to a normal function call. Hope this will help Regards, Uriel -- Uriel "Korfuri" Corfa Epitech student -- To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
