#include<stdio.h>
#define N 15
main()
{
    int i,j,n;
    float median,a[N],t;
    printf("enter the number of items\n");
    scanf("%d",&n);
    printf("input %d values\n",n);
    for(i=0;i<n;i++)
        scanf("%f",&a[i]);
    for(i=0;i<n-1;i++)
    {
        for(j=0;j<n-i;j++)
        {
            if(a[j]<=a[j+1])
            {
                t=a[j];
                a[j]=a[j+1];
                a[j+1]=t;
            }
            else
                continue;
        }
    }
    if(n%2==0)
        median=(a[n/2]+a[n/2-1])/2.0;
    else
        median=a[n/2];
    for(i=0;i<n;i++)
        printf("%10.2f",a[i]);
    printf("\n\nthe median is %.6f\n",median);
}

#include<stdio.h>
#define N 15
 void main()
{
    int i,j,n;
    float median,a[N],t;
    printf("enter the number of items\n");
    scanf("%d",&n);
    printf("input %d values\n",n);
    for(i=0;i<n;i++)
        scanf("%f",&a[i]);
    for(i=0;i<n-1;i++)
    {
        for(j=i+1;j<n-i;j++)//改
        {
            if(a[j]<=a[j+1])
            {
                t=a[j];
                a[j]=a[j+1];
                a[j+1]=t;
            }
            else
                continue;
        }
    }
    if(n%2==0)
        median=(a[n/2]+a[n/2-1])/2.0;
    else
        median=a[n/2];
    for(i=0;i<n;i++)
        printf("%10.2f",a[i]);
    printf("\n\nthe median is %.6f\n",median);
}

为什么这么改？望赐教