#include<stdio.h>
#include<stdlib.h>
main()
{
      int a[5]={4,3,2,1},b,i,j,k;
      for(i=0;i<5;i++)
      {
                      b=0;
                      for(j=1;j<4;j++)
                      {
                                      if(a[i]>a[j])
                                      k=a[i];
                                      a[i]=a[j];
                                      a[j]=k;
                                      b=1;
                                      }
                                      if(b==0)
                                      {break;}
                                      }
                                      for(i=0;i<5;i++)
                                      {
                                                      printf("%d\t",a[i]);
                                                      }
                                                      system("pause");
                                                      return 0;
                                                      }
求高手指点.......

谢了各位........