老师要求要用模板类 小白的我真的一脸懵逼 希望老司机们讲解并帮忙改一下代码

Question

老师要求要用模板类 我真的一脸懵逼 完全不知道C++怎么搞这玩意儿 希望老司机们讲解并帮忙改成规范符合要求的代码#include<iostream>#include <stdio.h>#include <fstream>#include <string.h> #include <iomanip>#include <string>#define N 20using namespace std;struct {char name[20]; //人名 20个字符内char job[20]; //工作单位 char tel[11]; //电话号码 11位char email[20]; //email地址}TelInfo; void menu(); void addrecord(){  char ch;  ofstream ofile("Result.txt",ios_base::out);  do   {    cout<<"请输入通讯录信息"<<endl;    cout<<"请输入姓名"<<endl;    cin>>TelInfo.name;    cout<<"请输入工作单位"<<endl; cin>>TelInfo.job;    cout<<"请输入电话号码"<<endl; cin>>TelInfo.tel;    cout<<"请输入邮件地址"<<endl; cin>>TelInfo.email;    ofile<<TelInfo.name<<"  "<<TelInfo.job<<"  "<<TelInfo.tel<<"  "<<TelInfo.email<<endl;    cout<<"您还要输入他人的通讯录信息吗(y/n))?"<<endl;    std::cin>>ch;   }while(ch=='y'); //yes情况下循环  ofile.close();}void  changecord(){ ifstream da("Result.txt", ios_base::in); string str;  bool flag = true; ofstream data("return.txt", ios_base::out); char a[20]; if (!da)    {        cout<<"找不到文件!!!!"<<endl;        return;    } cout<<"请输入你要修改人的姓名"<<endl; cin>>a; while ( da>>TelInfo.name)    {          getline(da, str);                if (strcmp(TelInfo.name,a)==0)        {            cout<<"你想修改的联系人:" <<endl;            cout<<TelInfo.name<<"  "<<str<<endl;            flag=false;            break;        }                    data<<TelInfo.name            <<" "<<str<<endl;    } if(flag)cout<<"没有该人"<<endl; else {        while (getline(da, str))        {            data<<str <<endl;        }        da.close();        data.close();        ifstream in("return.txt", ios::in);        ofstream out("Result.txt", ios::out);        if (!out || !in)        {            cout<<endl<<"对不起不能打开文件!!!"<<endl<<endl;            return;        }        while (getline(in, str))        {            out<<str<<endl;        }                 in.close();        ofstream change("Result.txt",ios_base::app);        cout<<"请输入正确的姓名"<<endl;        cin>>TelInfo.name;        cout<<"请输入正确的工作单位"<<endl;     cin>>TelInfo.job;        cout<<"请输入正确的电话号码"<<endl;     cin>>TelInfo.tel;        cout<<"请输入正确的邮件地址"<<endl;     cin>>TelInfo.email;        out<<TelInfo.name<<"  "<<TelInfo.job<<"  "<<TelInfo.tel<<"  "<<TelInfo.email<<endl;        cout<<"这个人的信息已经从你的通迅录中修改!!!" <<endl;  out.close(); }}void delrecord(){ ifstream da("Result.txt", ios_base::in); string str; bool flag = true; ofstream data("return.txt", ios_base::out); char a[20]; if (!da)    {        cout<<"找不到文件!!!!"<<endl;        return;    } cout<<"请输入你要删除人的姓名"<<endl; cin>>a; while ( da>>TelInfo.name)    {          getline(da, str);      if (strcmp(TelInfo.name,a)==0)        {            cout <<endl <<"你想删除的联系人:" <<endl;            cout<<TelInfo.name<<"  "<<str<<endl;            flag=false;            break;        }                    data<<TelInfo.name            <<" "<<str<<endl;    } if(flag)cout<<"没有该人"<<endl; else {        while (getline(da, str))        {            data<<str <<endl;        }        da.close();        data.close();        ifstream in("return.txt", ios::in);        ofstream out("Result.txt", ios::out);        if (!out || !in)        {            cout<<endl<<"对不起不能打开文件!!!"<<endl<<endl;            return;        }        while (getline(in, str))        {            out<<str<<endl;        }         out.close();        in.close();        cout <<endl <<"这个人的信息已经从你的通迅录中删除!!!" <<endl <<endl; }}void printcord(){ char ch; ifstream da("Result.txt");    cout<<"人名 "<<"工作单位 "<<"电话"<<" 邮件"<<endl; while (da.get(ch))    cout << ch;    da.close();}void searchcord(){ char a[20],b[20]; int n;  ifstream da("Result.txt"); cout<<"请输入要查找方式:"; cout<<"1.姓名"; cout<<"2.电话号码"<<endl; cin>>n; if(n==1) {        cout<<"请输入要查询的姓名"<<endl;        cin>>a;  while(da.eof()==0)  {         da>>TelInfo.name>>TelInfo.job>>TelInfo.tel>>TelInfo.email;         if(strcmp(TelInfo.name,a)==0)   {                cout<<"人名 "<<"工作单位 "<<"电话"<<" 邮件"<<endl;                cout<<TelInfo.name<<"  "<<TelInfo.job<<"  "<<TelInfo.tel<<"  "<<TelInfo.email<<endl;   }    }   cout<<"没有该人"<<endl;  da.close(); } if(n==2) {        cout<<"请输入要查询的电话"<<endl;        cin>>b;  while(da.eof()==0)  {         da>>TelInfo.name>>TelInfo.job>>TelInfo.tel>>TelInfo.email;         if(strcmp(TelInfo.tel,b)==0)   {              cout<<"人名 "<<"工作单位 "<<"电话"<<" 地址"<<endl;              cout<<TelInfo.name<<"  "<<TelInfo.job<<"  "<<TelInfo.tel<<"  "<<TelInfo.email<<endl;   }  }   cout<<"没有该人"<<endl;  da.close(); }    }void main(){ menu();}void menu(){   int i;    for(;;){        std::cout<<"   欢迎登陆简易版通讯录管理系统    "<<std::endl;        std::cout<<"###################################"<<std::endl;        std::cout<<"###########您好,欢迎光临!##########"<<std::endl;        std::cout<<"############请选择操作:############"<<std::endl;        std::cout<<"#        \t1.添加记录        #"<<std::endl;        std::cout<<"#        \t2.修改记录        #"<<std::endl;        std::cout<<"#        \t3.删除记录        #"<<std::endl;        std::cout<<"#        \t4.数据显示        #"<<std::endl;        std::cout<<"#        \t5.查询记录        #"<<std::endl;        std::cout<<"#        \t6.退出系统        #"<<std::endl;        std::cout<<"###################################"<<std::endl;        std::cin>>i;        if(!std::cin.good()){            std::cout<<"非法输入!"<<std::endl;            std::cin.clear();        }        switch(i){            case 1:                addrecord();  break;            case 2:                changecord();                break;            case 3:                delrecord();                break;            case 4:                printcord();                break;            case 5:                searchcord();                break;            case 6:                return;           default:                std::cout<<"错误的选项!"<<std::endl;        }    }}

Answer 1

这个有什么地方需要模板吗？