#include "stdio.h"
#include "string.h"
void main()  
{  
    char a[5][20], b[20];
    int i,j;
    printf("please input five countries' names:\n");  
    for(i=0;i<5;i++)  
      gets(a[i]);  
    for(i=0;i<4;i++)  
       for(j=i+1;j<5;j++)  
              if(strcmp(a[i],a[j])>0)
                 {     
                    strcpy(b,a[i]);
                    strcpy(a[i],a[j]);
                    strcpy(a[j],b);

                 }  
     printf("the array of those five countries now is :\n");  
     for(i=0;i<5;i++)  
       printf("%s\n",a[i]);  
         getch();  
}

为什么红字的部分要那么写啊？？？