（转）c++字符串简单加密

#include "stdafx.h"
#include<iostream>
//#include<ctime>

using namespace std;
void Makecode(char *pstr,int *pkey);
void Cutecode(char *pstr,int *pkey);
int _tmain(int argc, _TCHAR* argv[])
{
    int key[]={1,2,3,4,5};//加密字符
    char s[]="www.xiaozhuanggushi.com";
    char *p=s;
    cout<<"加密前:"<<p<<endl;
    Makecode(s,key);//加密
    cout<<"加密后:"<<p<<endl;    
    Cutecode(s,key);//解密
    cout<<"解密后:"<<p<<endl;

    int c;
    cin>>c;    
    return 0;
}

运行结果:

 

//单个字符异或运算

char MakecodeChar(char c,int key){
    return c=c^key;
}

 

//单个字符解密

char CutcodeChar(char c,int key){
    return c^key;
}

 

//加密

void Makecode(char *pstr,int *pkey){
    int len=strlen(pstr);//获取长度
    for(int i=0;i<len;i++)
        *(pstr+i)=MakecodeChar(*(pstr+i),pkey[i%5]);
}

 

//解密

void Cutecode(char *pstr,int *pkey){
    int len=strlen(pstr);
    for(int i=0;i<len;i++)
        *(pstr+i)=CutcodeChar(*(pstr+i),pkey[i%5]);
}

 转自：http://blog.csdn.net/henren555/article/details/10930261