用指针法实现选择法排序程序，输入20个整数，并用指针实现选择法升序排序

Question

用指针法实现选择法排序程序，输入20个整数，并用指针实现选择法升序排序

Answer 1

#include <stdio.h>
int main()
{
    int a[20], t;
    int i, j, max;
    printf("请输入20个数:\n");
    for (i = 0; i <= 19; i=i+1)
        scanf_s("%d", a+i);
    for (j = 19; j >=0; j = j-1)
    {
        max = j;
        for (i = 0; i <=j; i = i + 1) 
        {
            if (a[max] <= *(a+i))
                max = i;
            if (max != j)
            {
                t = a[max]; a[max] = *(a+j); *(a+j) = t;
            }
        }
    }
    for (i = 0; i <= 19; i=i+1)
        printf("%-3d",*(a+i));

    return 0;
}

运行结果：