Question

I wish to have a file name as an argument to the C program. I tried all the possible ways in fopen something like the below.

fp = fopen(*argv[2], "r");

Also used "*argv[2]" but did not work. I want to know where I am going wrong so that I can use this correctly. Thanks!

Answer 1

It should be

fp = fopen(argv[2], "r");

Please be aware that argv[0] will contain your exe name(with path), other arguments which you pass will start from argv[1].

Refer to this for more details on using command line arguments in C.

In your main function if you are getting char **argv as the argument, the array subscripting argv[1] automatically turns it into a char * which is expected as an argument by fopen.