c3-15.cpp

来自「谭浩强C程序设计习题答案」· C++ 代码 · 共 16 行

#include <iostream>
using namespace std;
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;
      }
    cout<<c;
   }
 cout<<endl;
 return 0;
}