You input arguments into your program using argc and argv. argc is number of arguments and argv is the list of arguments. There is no string in c so you use ch

You input arguments into your program using argc and argv. argc is number of arguments and argv is the list of arguments. There is no string in c so you use char pointers instead. But in previous code he used char, which is usually defines a single string, but main actually inputs an array of string so it should have been char* (pointer to pointer of char, or pointer to 'string') Basically he did something like this in Java public static void main(String args) instead of public static void main(String args[])