39 lines
932 B
C
39 lines
932 B
C
#include <stdio.h>
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#include <getopt.h>
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#include <stdlib.h>
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void main(int argc, char *argv[]) {
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int c;
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if(argc<2)
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{
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puts("Usage: getopt_ex [options]\n");
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puts("-a Show 'Option a'");
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puts("-B Show 'Option B'");
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puts("-n [num] Show 'num'");
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}
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while ((c = getopt(argc, argv, "aBn:")) != EOF) {
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switch (c) {
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case 'a':
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puts("Option 'a'");
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break;
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case 'B':
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puts("Option 'B'");
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break;
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case 'n':
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printf("Option n: value=%d\n", atoi(optarg));
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break;
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case '?':
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printf("ERROR: illegal option %s\n", argv[optind-1]);
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exit(0);
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default:
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printf("WARNING: no handler for option %c\n", c);
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exit(0);
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}
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}
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exit(0);
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}
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