Answer C3

#include <stdio.h>
void main( int argc, char *argv[] )
{
  printf("Argument Count: %d\n", argc );
  
  if ( argc >=2 )
    printf("First Param: %s\n", argv[1] );
  else
    printf("No param after the program name\n");
}

Print out argv[0] if you want. You will likely get a full path name, depending on your system.