C++ 控制檯簡單電話本實現

<span style="font-family:Courier New;font-size:14px;">#include<iostream>
#include<fstream>
#include<string>
using namespace std;

class People
{
	private:
		string name;
		string tel;
	public:
		People(){}
		void setName(string _name){name=_name;}
		void setTel(string _tel){tel=_tel;}
		string getName(){return name;}
		string getTel(){return tel;}
};

class Contact
{
	private:
		People people[100];
		int count;
	public:
		Contact()
		{
			count=0;
			readfile();
			if(count==0)add();
			int choice=-1;
			while (choice!=0){
				cout<<endl<<endl;
				showName();
				menu();
				cin>>choice;
				switch(choice){
					case 0 :save();break;
					case 1 :{
							cout<<"Name:";
							string _name;
							cin>>_name;
							int position=search(_name);
							if(position!=-1)cout<<"tel:"<<people[position].getTel()<<endl;break;
							}
					case 2 :add();break;
					case 3 :{
							cout<<"Name:";
							string _name;
							cin>>_name;
							del(_name);break;
							}
					default:break;
				}
				
			}
		}
		void menu()
		{
			cout<<"\t\t*************** Contact ***************\n";
			cout<<"\t\t               1.search                \n";
			cout<<"\t\t               2.add                   \n";
			cout<<"\t\t               3.del                   \n";
			cout<<"\t\t               0.exit                  \n";
			cout<<"please input 0-3:\n";
		}
		int search(string _name)
		{
			int i;
			for(i=0;i<count;i++){
				if(_name==people[i].getName()){
					return i;
				}
			}
			if(i==count){
				cout<<"can't find."<<endl;
				return -1;
			}
		}
		void add()
		{
			char ch;
			while(true){
				string _name,_tel; 
				cout<<"Name:";
				cin>>_name;people[count].setName(_name);
				cout<<"Tel:";
				cin>>_tel;people[count].setTel(_tel);
				count++;
				cout<<"continue?	y/n    ";
				cin>>ch;
				if(ch=='n')break;
			}
		}
		void del(string _name)
		{
			int position;
			position=search(_name);
			if(position!=-1){
				for(int i=position;i<count;i++){
					people[i]=people[i+1];
				}
				count--;
			}
		}
		void save()
		{
			ofstream write("data.txt",ios::out);
			if(!write){
                cerr<<"open error!"<<endl;
                exit(1);
        	}
        	for(int i=0;i<count;i++){
				write<<people[i].getName();
				write<<" ";
				write<<people[i].getTel();
				if(i<count-1)write<<endl;
			}
        	write.close();
		}
		void showName()
		{
			for(int i=0;i<count;i++){
				cout<<people[i].getName()<<endl;
			}
		}
		void readfile()
		{
			ifstream read("data.txt",ios::in);
			if(read){
                while(!read.eof()){
	        		string _name,_tel;
					read>>_name>>_tel;
					people[count].setName(_name);
					people[count].setTel(_tel);
					count++;
				}
				
        	}
        	else{
				//cerr<<"open error!"<<endl;
                //exit(1);
			}
        	
        	read.close();
		}
};

int main()
{
	Contact contact;
	return 0;
}</span>