스트링 배열 정렬(sorting)하기 with C

[파일명:  testSort.c]------------------------------------------------
#include <stdio.h>
#include <string.h>

char SBUF[20][80];
char TBUF[80];

void quickSort(char array[20][80], int start, int end);
void swap(char array[20][80], int x, int y);
void printArray(char array[20][80], int start, int end);
void exit(int n);

int main(int argc, char* argv[]) {
    char* pbuf;
    int i;
    if (argc > 1 && argc < 22) {
        for (i = 0; i < argc - 1; i++) {
            if (strlen(argv[i+1]) > 79) {
                printf("Caught: strlen(\"%s\") = %d, which is too long.\n", argv[i+1], strlen(argv[i+1]));
                exit(1);
            }
            sprintf(SBUF[i], argv[i+1]);
        }
        quickSort(&SBUF[0], 0, argc - 2);
        printArray(SBUF, 0, argc - 2);
    }
    else if (argc > 21) {
        printf("Given too many items. (The counter of items should be less then 20.)\n");
        exit(1);
    }
    return 0;
}

void quickSort(char array[20][80], int start, int end) {
    int i = start;
    int k = end;
    char pivot[80];

    if (end - start >= 1) {
        strcpy(pivot, array[start]);
        while (k > i) {
            while (strcmp(array[i], pivot) <= 0 && i <= end && k > i)
                i++;
            while (strcmp(array[k], pivot) > 0 && k >= start && k >= i)
                k--;
            if (k > i) {
                swap(array, i, k);
            }
        }
        swap(array, start, k);

        quickSort(array, start, k - 1);
        quickSort(array, k + 1, end);
    }
    else {
        return;
    }
}

void swap(char array[20][80], int x, int y) {
     strcpy(TBUF, array[x]);
     strcpy(array[x], array[y]);
     strcpy(array[y], TBUF);
}

void printArray(char array[20][80], int start, int end) {
    int i;
    printf("[");
    for (i = start; i < end; i++) {
        printf("%s, ", array[i]);
    }
    if (end >= start)
        printf("%s", array[end]);
    printf("]\n");
}
------------------------------------------------


컴파일> cl testSort.c
또는
컴파일> bcc32 testSort.c
또는
컴파일> gcc -o testSort testSort.c

실행> testSort 하나 둘 셋 넷
[넷, 둘, 셋, 하나]

실행> ./testSort one two thee four
[four, one, three, two]