Vito Scarlett
2021-11-18 16:43
采纳率: 100%
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关于#c语言#的问题:程序来自书本,测试时不报错但无法运行

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运行环境:Windows11
使用vs2017编辑


//qsort.c
/*sorts an array of integers using quicksort algorithm*/
#include<stdio.h>

#define N 10

void quicksort(int a[], int low, int high);
int split(int a[], int low, int high);

int main(void)
{
    int a[N], i;
    
    printf("Enter %d number to be sorted:", N);
    for (i = 0; i < N; i++)
        scanf_s("%d", &a[i]);

    quicksort(a, 0, N - 1);
    printf("In sorted order:");
    for (i = 0; i < N; i++)
        printf("%d ", a[i]);
    printf("\n");

    return 0;
}
void
quicksort(int a[], int low, int high)
{
    int middle;

    if (low >= high) return;
    middle = split(a, low, high);
    quicksort(a, low, middle - 1);
    quicksort(a, middle + 1, high);
}

int
split(int a[], int low, int high)
{
    int part_element = a[low];

    for (;;) {
        while (low < high&&part_element <= a[high]);
        high--;
        if (low >= high) break;
        a[low++] = a[high];

        while (low < high&&a[low] <= part_element)
            low++;
        if (low >= high) break;
        a[high--] = a[low];
    }

    a[high] = part_element;
    return high;
}

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