25 lines
517 B
C
25 lines
517 B
C
#include <stdio.h> /* fprintf(3), stderr */
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#include <stdlib.h> /* EXIT_FAILURE */
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#include <sysexits.h>
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static char *program_name = "strcmp";
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int main(int argc, char *argv[]){
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int i;
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if(argc < 3){
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fprintf(stderr, "Usage: %s [string] [string...]\n",
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argv[0] == NULL ? program_name : argv[0]);
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return EX_USAGE;
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}
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for(; *argv[1] != '\0'; ++argv[1])
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for(i = 2; i < argc; ++i)
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if(*argv[i-1] > *argv[i])
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return 1;
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else if(*argv[i-1] < *argv[i]++)
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return -1; /* actually 255 */
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return 0;
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}
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