凯撒密码

#include "stdafx.h"
#include "iostream"
using namespace std;
#include "string"

void func1(string &s1,int x)
{
    for(int i=0;i<s1.size();i++)
        s1[i]=(s1[i]-97+x)%26+65;
}

void func2(string s1,int x)
{
    for(int i=0;i<s1.size();i++)
        s1[i]=(s1[i]-65-x+26)%26+97;
    cout<<s1<<endl;
}

int _tmain(int argc, _TCHAR* argv[])
{ 
    string s1="JBCRCLQRWCRVNBJENBWRWN";
    //cin>>s1;

    //func1(s1,0);
    for(int i=0;i<27;i++)
    {
        func2(s1,i);
    }
    
    return 0;
}