int main(){ |
char c; |
while ((c= getchar ()) != '\n' ){ |
if ((c>= 'A' &&c<= 'Z' ) || (c>= 'a' &&c<= 'z' )){ |
c = c + 4; |
if (c>= 'Z' && c <= 'Z' +4 || c> 'z' ) c = c - 26; //注意小写字母也满足这个条件,不加<‘Z’+4限制会出错,小写字母会-22 |
} |
printf ( "%c" , c); |
} |
return 0; |
} |