#include<stdio.h>
void main()
{   
    int i=0;
   
    char string[100];
    printf("the code is \n ");
    scanf("%s",string);
   
    printf("the original is \n");
    while((string[i])!='\0')
    {
   
     if(string[i]>'A'&&string[i]<'Z')
     {   
         string[i]=155-string[i];
      
     }
     if(string[i]>'a'&&string[i]<'z')
     {
           string[i]=219-string[i];
   
     }
     else
     {
    string[i]=string[i];
     }
      i++;
    }
   printf("%s",string);
 
}

为什么SCANF不行呢？还有在C++中应该用什么来替代GETS？

明白了！！谢谢