字符串字典排序

dictsort.c

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

#define M 6
#define N 5

/* reverse strcmp to get descending sort */
int cmp(char *s1, char *s2) {
    return -strcmp(s1, s2);
}

int main(int argc, char *argv[]) {
    int i;
    char strings[M][N];

    for (i = 0; i < M; i++) {
        scanf("%s", &strings[i]);
    }

    /* reference: http://www.codecogs.com/reference/c/stdlib.h/qsort.php */
    qsort(strings, M, N, cmp);

    printf("The result is:\n");

    for (i = 0; i < M; i++) {
        printf("%s\n", strings[i]);
    }

    return 0;
}