c++设计一个计时器（能够暂停，重新开始，继续）的功能。写的不好，仅供参考！

#include<iostream>
#include<windows.h>
#include<conio.h>
#include<time.h>
#include<iomanip>
using namespace std;
void gotoxy(int x, int y)							//定位光标，x为行坐标,y为列坐标
{	COORD pos = {x,y};								//（坐标  位置）； HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);  //得到标准处理（标准输出处理）； SetConsoleCursorPosition(hOut, pos);			//设置控制台光标位置； 
}				
void  hidden()										//隐藏光标
{HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);CONSOLE_CURSOR_INFO cci;GetConsoleCursorInfo(hOut,&cci);cci.bVisible=0;									//赋1为显示，赋0为隐藏SetConsoleCursorInfo(hOut,&cci);
}	
class Time
{public:Time(){hour=minute=second=0;gotoxy(40,10);display();}	  void menu();void xuanze();private:void settime();void display();	void chongzhi(){second=0;minute=0;hour=0;} double hour;double minute;double second;
};
void Time::settime( )
{	second++;if(second==60){second=0;minute++;}else if(minute==60){minute=0;hour++;}Sleep(1000);
}
void Time::display()
{cout<<setw(2)<<setfill('0')<<hour<<":";cout<<setw(2)<<setfill('0')<<minute<<":";cout<<setw(2)<<setfill('0')<<second<<endl;
}
void Time::menu()
{gotoxy(40,6);cout<<"*&计时器&*"<<endl; gotoxy(26,18);cout<<"按a开始计时     按s重新计时   按空格暂停"<<endl; 
}
void Time::xuanze()
{char key;hidden();key=getch();if(key=='a'||key=='A'){while(1){	if(kbhit()){	hidden();key=getch();if(key=='s'||key=='S'){chongzhi();xuanze();}else if(key==' '){xuanze();}}settime();gotoxy(40,10);display();}}else xuanze();
}
int main()
{Time te;te.menu();te.xuanze();
}