Answer:
// calculator program in C++.
#include <bits/stdc++.h>
using namespace std;
// main function
int main()
{
// variables
int x,y;
int ch;
cout<<"Enter 1st number:";
// read first number
cin>>x;
cout<<"Enter 2nd number:";
// read second number
cin>>y;
cout<<"Choose 1) for add, 2) for subtract, 3) for multiply or 4) for divide):";
// read choice
cin>>ch;
switch(ch)
{
// if choice is 1, find Addition
case 1:
cout<<"Addition of two numbers is:"<<(x+y)<<endl;
break;
// if choice is 2, find subtraction
case 2:
cout<<"Subtract the second from the first is:"<<(x-y)<<endl;
break;
// if choice is 3, find multiplication
case 3:
cout<<"Multiplication of two numbers is:"<<(x*y)<<endl;
break;
// if choice is 4, find division
case 4:
cout<<"Division the first by the second is:"<<(x/y)<<endl;
break;
// if choice is other
default:
cout<<"Wrong choice:"<<endl;
break;
}
return 0;
}
Explanation:
Read two numbers from user.Then read the choice of operation from user.If choice is 1, then print the Addition of both numbers.If choice is 2, then print the subtraction. If the choice is 3, then print the multiplication.If choice is 4, then print the division.If choice is other than these, then print wrong choice.
Output:
Enter 1st number:10
Enter 2nd number:2
Choose 1) for add, 2) for subtract, 3) for multiply or 4) for divide):3
Multiplication of two numbers is:20
