#include<stdio.h>
#include<time.h>
#define MAX_SIZE 100
#define EXCHANGE(x,y,temp) ((temp)=(x),(x)=(y),(y)=(temp))
void love(int sh[], int n);

main()
{
    int n,i;
    int sh[MAX_SIZE];
    printf("请输入要数字的个数按回车键结束");
    scanf_s("%d", &n);
    if (n<0 || n>MAX_SIZE)
    {
        printf("数组申请失败\n");
        exit(1);
    }
    srand((unsigned)time(0));
    for (i = 0; i < n; i++)
    {
        sh[i] = rand() % 100;
        printf("%d   ", sh[i]);
    }
    love(sh, n);
    printf("\n");
    for ( i = 0; i < n; i++)
    {
        printf("%d   ", sh[i]);
    }
   
}
void love(int sh[], int n)
{
    int i, j,min,temp;
    temp = 1;
    for (i = 0; i < n-1; i++)
    {
        min = i;
        for (j = i + 1; j <= n; j++)
        {
            if (sh[j] < sh[min])
            {   
                min = j;
                EXCHANGE(sh[min], sh[i], temp);

            }
            
        }
        
        
    }
}

找了半天 实在找不到  才学不久

    for (i = 0; i < n-1; i++)
    {
        min = i;
        for (j = i + 1; j < n; j++)
        {
            if (sh[j] < sh[min])
            {   
                min = j;
            }
        }
        if (min != i) EXCHANGE(sh[min], sh[i], temp);
    }