#include<stdio.h>
 void main()
 {
     int a[10];
     int i,j,t;
     printf("input 10 numbers:\n");
     for(i=0;i<10;i++)
         scanf("%d",&a[i]);
     printf("\n");
     for(j=0;j<9;j++)                          /*每个数都开始比较一次,外层循环*/
         for(i=0;i<9-j;i++)                    /*开始前后两两比较*/
             if(a[i]>a[i+1])
             {
                 t=a[i];
                 a[i]=a[i+1];
                 a[i+1]=t;
             }
             printf("the sorted numbers:\n");
             for(i=0;i<10;i++)
                 printf("%d ",a[i]);
             printf("\n");
 }

对的啊，什么问题？