+ } else if(strcmp(argv[i], "-p") == 0 || strcmp(argv[i], "-pad") == 0) {
+ padding = strtol(argv[++i], &endp, 10);
+ if(endp == argv[i] || padding < 0) {
+ fprintf(stderr, "%s must be followed by a positive number\n", argv[i - 1]);
+ return 1;
+ }
+