#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>


main(int argc, char **argv)
{
    int aparam = -1, iparam = -1, jparam = -1, tparam = -1;
    int ch;
    extern char *optarg;
    while ((ch = getopt(argc, argv, "a:i:j:t:")) != -1) {
      switch(ch) {
      case 'a': aparam = atoi(optarg);break; 
      case 'i': iparam = atoi(optarg); break;
      case 'j': jparam = atoi(optarg); break;
      case 't': tparam = atoi(optarg); break;
      default:  
	  printf("usage: -a <value> -i <value> -j <value> -t <value>"); 
	  exit(0);
      }
    } 
  
    
    printf("Initial values:\n");
    printf("a = %d\n", aparam);
    printf("i = %d\n", iparam);
    printf("j = %d\n", jparam);
    printf("t = %d\n", tparam);
    return 0;
}