慕雪9513658
#include<iostream>
#include<math.h>
using namespace std;
void menu();
void addition();
void sub();
void mul();
void div();
void help();
int main()
{
menu();
help();
int a;
cin>>a;
cout<<endl;
while(a!=5)
{
switch(a){
case 1:addition();
break;
case 2:sub();
break;
case 3:mul();
break;
case 4:div();
break;
default:cout<<"这不是选项!"<<endl;
}
menu();
cin>>a;
cout<<endl;
}
cout<<"感谢使用!"<<"\n";
cin.get();
return 0;}
void addition()
{
cout<<"欢迎使用加法!"<<endl;
int number1;
cout<<"输入一个整数:"<<endl;
cin>>number1;
int number2;
cout<<"输入另一个整数:"<<endl;
cin>>number2;
int sum;
sum=number1+number2;
cout<<"sum="<<sum<<endl;
cout<<endl;
}
void sub()
{
cout<<"欢迎使用减法!"<<endl;
int number3;
cout<<"输入一个整数:"<<endl;
cin>>number3;
int number4;
cout<<"输入另一个整数:"<<endl;
cin>>number4;
int jian;
jian=number3-number4;
cout<<"jian="<<jian<<endl;
cout<<endl;
}
void mul()
{
cout<<"欢迎使用乘法!"<<endl;
int number5;
cout<<"输入一个整数:"<<endl;
cin>>number5;
int number6;
cout<<"输入另一个整数:"<<endl;
cin>>number6;
int cheng;
cheng=number5*number6;
cout<<"cheng="<<cheng<<endl;
cout<<endl;
}
void div()
{
cout<<"欢迎使用除法!"<<endl;
int number7;
cout<<"输入一个整
