Question

I have to create a tester program for a C project (codetester.c). The user calls the program by executing:

codetester

or

codetester filename

How do I set up my project so that these commands can be executed?

Answer 1

Define your main function like

int main(int argc, char *argv[]);

argc holds the number of arguments, this will be 2 for “codetester filename”.
argv holds an array of char sequences; argv[0] will be “codetester” and argv[1] will be “filename”.