// video from ECE 1620, April 2020: FC-2020-04-w15.1:argc,argv.mp4
//  https://drive.google.com/file/d/10CnNJS0u3AFUtrzA6yymMfVS5KQ_fsrl/view
//
#include <stdio.h>
#include <stdlib.h> // for int atoi(), long atol(), long long atoll(), double atof()
#include <math.h>
//
// int main( void) // no access to command-line arguments
//
// int main( int count, char *words[]) // words[i] is a string from the command-line
//
int main( int argc, char *argv[]) //  using traditional names for the arguments
{
  // for( int i = 0; i < count; ++i) printf( "%i: %s\n", i, words[i]);
 
  for( int i = 0; i < argc; ++i) printf( "%i: %s\n", i, argv[i]);
 
  int n=0; if( argc > 1) n = atoi(argv[1]); // convert string to int
 
  double d=0; if( argc > 2) d = atof(argv[2]); // convert string to double
 
  printf( "n = %i, d = %g\n", n, d);
 
  return 0;
}

/* sample runs:

$ gcc -Wall args.c

$ ./a.out abc efg < args.c | cat
0: ./a.out
1: abc
2: efg
n = 0, d = 0

$ ./a.out 1234 56.78
0: ./a.out
1: 1234
2: 56.78
n = 1234, d = 56.78

$

*/