带加密的密码类编程要点一、密码类的结构PassWordstructuser{charusername[11];charpassword[11];}up[10];voidReadFile()voidWriteFile()voidInputUserName(int&i)voidhide(charmm[])voidInputPassWord(inti)voidAppendUser()voidDelUser()voidModifyPassword()voidPrintUser()voidModifyUser(charcz[])二、密码类的定义#include<conio.h>#include<fstream>#include<string.h>#include<iostream>usingnamespacestd;classPassWord{private:structuser{charusername[11];charpassword[11];}up[10];public:PassWord(){inti;for(i=0;i<11;i++){strcpy(up[i].username,"");strcpy(up[i].password,"");}}voidReadFile()//读用户文件voidWriteFile()//写用户文件voidGetUserName(charuname[],inti)//获取用户名voidInputUserName(int&i)//输入用户名voidhide(charmm[])//隐藏输入密码voidInputPassWord(inti)//输入密码voidAppendUser()//增加用户voidDelUser()//删除用户voidModifyPassword()//修改用户密码voidPrintUser()//显示用户名和密码voidModifyUser(charcz[])//用户维护主菜单};函数代码如下：PassWord(){inti;for(i=0;i<11;i++){strcpy(up[i].username,"");strcpy(up[i].password,"");}}voidWriteFile()//写用户文件{fstreamuserfile;userfile.open("user.dat",ios::out);if(!userfile){cout<<"passwordfilecan'topen.\n";abort();}userfile.write((char*)up,sizeof(up));userfile.close();}voidReadFile()//读用户文件{fstreamuserfile;userfile.open("user.dat",ios::in);if(!userfile){inti,j;i=0;cout<<"\n\n您是第一次实用该系统，请设置用户"<<endl<<endl;cout<<"请输入用户名(1-10个字符)：";cin>>up[i].username;cout<<"请输入用户密码(1-10个字符)：";cin>>up[i].password;j=0;}else{userfile.read((char*)up,sizeof(up));userfile.close();}}voidInputUserName(int&i)//输入用户名{charstr[11];intcheck=0;ReadFile();cout<<"\n\t\t\t\t用户名:";for(intn=3;n>0;n--){cin>>str;i=0;while(strcmp(str,up[i].username)!=0&&i<10)i++;if(strcmp(str,up[i].username)==0){check=1;break;}else{cout<<"用户名不正确,请重新输入:";}}if(!check){cout<<endl<<"对不起,您已经输入了三次,请查证后再进入!!!"<<endl<<endl;exit(1);}}voidhide(charmm[])//输入密码{intindex=0;while(1)