以下是引用bityangke在2013-7-28 11:07:36的发言：

算是挖坟吧，我觉得你的代码有些繁琐，而且同一种形式表述了两次
#include <stdio.h>
#include <math.h>
main()
{
    int n,i,j,m,k=0;
    printf("请输入一个偶数：\n");
    scanf("%d",&n);
    if(n%2==0)
    {
        for(i=3;i<=n/2;i+=2)
        {
            for(j=2;j<=sqrt(i);j++)
                if(i%j==0)
                    break;
            if(j>sqrt(i))
            {   
                m=n-i;
                for(j=2;j<=sqrt(m);j++)
                    if(m%j==0)
                        break;
                if(j>sqrt(m))
                {
                    printf("%d=%d+%d\n",n,i,m);
                    k++;
                }
            }
        }
    }
    else
        printf("您输入的不是偶数！：");
    printf("%d\n",k);
}