#include<iostream.h>
#include<stdlib.h>
#include<math.h>
void index_29();
void yunsuan_29();
void yunsuan_29(){
}
void index_29()
{	system("cls");
	int xuanxiang;
cout<<endl;
cout<<endl;
cout<<"				$$$$$$$$$$$$$$$$计算器$$$$$$$$$$$$$$$$$"<<endl;
cout<<"				$$									$$"<<endl;
cout<<"				$$			1:运算开始				$$"<<endl;
cout<<"				$$									$$"<<endl;
cout<<"				$$			2:使用说明				$$"<<endl;
cout<<"				$$									$$"<<endl;
cout<<"				$$			3:其他					$$"<<endl;
cout<<"				$$									$$"<<endl;
cout<<"				$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$"<<endl;
cout<<"						请输入您要的操作(1/2/3):";
cin>>xuanxiang;
	if(xuanxiang==1)
	{
		yunsuan_29();
	}
	else if(xuanxiang==2)
	{
		cout<<"使用说明"<<endl;
	}
	else{
		cout<<"输入错误，请重新输入！";
		index_29();
	}
}
int main()
{
	index_29();
}