text: #include "sc_option.h"
  
  static struct sc_option_item options[] = {{.letter = 'm', .name = NULL},
  					  {.letter = 'k', .name = "key"},
  					  {.letter = 'h', .name = "help"}};
  
  int main(int argc, char *argv[])
  {
  	char *value;
  
  	struct sc_option opt = {.argv = argv,
  				.count = sizeof(options) / sizeof(options[0]),
  				.options = options};
  
  	for (int i = 1; i < argc; i++) {
  		char c = sc_option_at(&opt, i, &value);
  		switch (c) {
  		case 'm':
  			// If value does not exist, it will point to '\0'
  			// character.
  			printf("Option 'm', value : %s \n", value);
  			break;
  		case 'k':
  			printf("Option 'k', value : %s \n", value);
  			break;
  		case 'h':
  			printf("Option 'h', value : %s \n", value);
  			break;
  		case '?':
  			printf("Unknown option : %s \n", argv[i]);
  			break;
  		}
  	}
  
  	return 0;
  }
  