#include
#include
#include
using namespace std;

ifstream in("密码学.txt");

void JiaMi(char ZhiHuan[]);   //加密函数
void JieMi(char ZhiHuan[]);   //解密函数
void setZhiHuan(char ZhiHuan[],char fanZhiHuanBiao[]);  //设置置换表函数
int main()
{
 int m;    //确定是加密或解密？加密为1，解密为2
 char ZhiHuanBiao['z'+1];   //正向置换表，加密时用
 char fanZhiHuanBiao['Z'+1];  //反向置换表，解密时用
 cout<<"加密按输入1，解密输入2"<>m;    //读入m
 setZhiHuan(ZhiHuanBiao, fanZhiHuanBiao); //设置置换表
 switch(m) //判断m值，执行相应的功能
 {
 case 1: JiaMi(ZhiHuanBiao);break;
 case 2: JieMi(fanZhiHuanBiao);break;
 default:break;
 }
 return 0;
}

void JiaMi(char ZhiHuan[]) //加密
{
 string MingWen;  //保存明文
 cout<='a' && MingWen[i]<='z')
 cout<='A' && MiWen[i]<='Z')
 cout<= 'A' && s[i] <='Z')
 {
 for(int j = 0; j < s1.length();j++)
 {
 if(s[i] == s1[j])
 {
  sign = 1;
  break;
 }
 }
 if(sign == 0) s1 = s1 + s[i];
 else sign = 0;
 }
 }
 for( j ='a';j<='z';j++)cout<