Question

I wonder how to write a C program with options that can be invoked by a terminal.
Example : Person.c

#include <stdio.h>
void main ()
{
     char option;

     if(option == 'f') printf("First Name");
     else if(option == 'l') printf("Last Name");
     else printf("Full Name");
}  

Compile it with

cc Person.c -o Person

Objective :
I want to reach my program options through terminal.
Example :

./Person -f

Output : First Name

Answer 1

void main () is wrong, if you copied this from a book, throw the book away

It should be int main(int argc, char **argv), argc will then be set to the number of arguments and argv[1] …. argv[argc-1] are the argument strings (argv[0] is the name of the program)