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

int main(int argc, char *argv[])
{
int arg;
for(arg = 0; arg < argc; arg++)
	{
	if(argv[arg][0] == ‘-‘)
		printf(“option: %s\n”, argv[arg]+1);
	else
		printf(“argument %d: %s\n”, arg, argv[arg]);
	}
	exit(0);
}

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{int opt;
while((opt = getopt(argc, argv, “:if:lr”)) != -1) {
switch(opt) {
case ‘i’:
case ‘l’:
case ‘r’:
printf(“option: %c\n”, opt);
break;
case ‘f’:
printf(“filename: %s\n”, optarg);
break;case ‘:’:
printf(“option needs a value\n”);
break;case ‘?’:
printf(“unknown option: %c\n”, optopt);
break;
}
}
for(; optind < argc; optind++)
printf(“argument: %s\n”, argv[optind]);
exit(0);
}