27 lines
754 B
C
27 lines
754 B
C
#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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int main(int argc, char *argv[])
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{
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bool isCaseInsensitive = false;
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int opt;
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enum { CHARACTER_MODE, WORD_MODE, LINE_MODE } mode = CHARACTER_MODE;
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while ((opt = getopt(argc, argv, "ilw")) != -1) {
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switch (opt) {
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case 'i': isCaseInsensitive = true; break;
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case 'l': mode = LINE_MODE; break;
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case 'w': mode = WORD_MODE; break;
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default:
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fprintf(stderr, "Usage: %s [-ilw] [file...]\n", argv[0]);
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exit(EXIT_FAILURE);
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}
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}
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// Now optind (declared extern int by <unistd.h>) is the index of the first non-option argument.
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// If it is >= argc, there were no non-option arguments.
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}
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