C++ MP3播放器按钮类似功能实现

// Class01.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include <stdlib.h>#include <vector>#include <string>#include <conio.h>#include <stdio.h>#include <iostream>using namespace std;class Mp3Menu{private:vector<string> SongList;//歌曲容器，用于保存歌曲列表    vector<string>::iterator SongListIter;//容器迭代器，用于指示歌曲int ListNO;public:Mp3Menu();Mp3Menu(vector<string> &SongList);void Interface();//展示歌曲列表的界面函数，用于上下的功能void AddSong(const string SongName);//添加歌曲的函数void Init();};void Mp3Menu::Init(){this->SongListIter = SongList.begin();this->ListNO = 0;}Mp3Menu::Mp3Menu(){SongListIter = SongList.begin();this->ListNO = 0;}Mp3Menu::Mp3Menu(vector<string> &SongList){this->SongList = SongList;this->SongListIter = SongList.begin(); this->ListNO = 0;}void Mp3Menu::AddSong(const string SongName){this->SongList.push_back(SongName);}void Mp3Menu::Interface(){char button;int SongNumber = 0,i = 0,FourSong = 1;int CurrentNO = 1;Init();while( this->SongListIter != this->SongList.end() ){this->SongListIter++;SongNumber++;}while( 1 ){system("cls");if( (FourSong >= SongNumber-3) && SongNumber >= 4 )FourSong = SongNumber - 3;if( SongNumber >= 4 ){for( i = 1; i <= 4; i++ ){cout<<"--------------------"<<endl;if( i == CurrentNO )cout<<"-->"<<FourSong<<"."<<SongList.at(FourSong)<<endl;elsecout<<FourSong<<"."<<SongList.at(FourSong)<<endl;FourSong++;}}else{for( i = 1; i <= SongNumber; i++ ){cout<<"--------------------"<<endl;if( i == CurrentNO )cout<<"-->"<<FourSong<<"."<<SongList.at(FourSong)<<endl;elsecout<<FourSong<<"."<<SongList.at(FourSong)<<endl;FourSong++;}}button = getch();switch (button){case '0':exit(1);break;case 's':this->ListNO++;CurrentNO++;if( this->ListNO > SongNumber - 1 ){this->ListNO = 0;CurrentNO = 1;}if( CurrentNO > 4 ){CurrentNO = 4;}break;case 'w':this->ListNO--;//CurrentNO--;if( this->ListNO < 0 ){this->ListNO = SongNumber - 1;CurrentNO = 4;}if( this->ListNO <= 3 )CurrentNO--;if( CurrentNO <= 0 ){CurrentNO = 1;}break;default:break;}if( this->ListNO > 3 )FourSong = this->ListNO - 3;elseFourSong = 1;}}int _tmain(int argc, _TCHAR* argv[]){vector<string> SongList;string temp;string SongName;//for( i = 0; i< 20; i++ )//{////SongName = "love" + temp;//SongList.push_back(SongName);//}SongList.push_back("a");SongList.push_back("b");SongList.push_back("c");SongList.push_back("d");SongList.push_back("f");SongList.push_back("e");SongList.push_back("f");SongList.push_back("g");SongList.push_back("h");SongList.push_back("i");SongList.push_back("j");SongList.push_back("k");Mp3Menu test(SongList);test.Interface();return 0;}