calculator.cpp

#include<iostream>
using namespace std;

int main() {
    int choice,a,b;
    cout<<"CALCULATOR"<<endl;
    cout<<"1. Addition"<<endl;
    cout<<"2. Subtraction"<<endl;
    cout<<"3. Multiplication"<<endl;
    cout<<"4. Division"<<endl;
    cout<<"Enter your choice : "<<endl;
    cin>>choice;
    cout<<"Enter 2 numbers : "<<endl;
    cin>>a>>b;
   switch(choice) {
        case 1:
        cout<<"Addition : "<<a+b<<endl;
        break;
        case 2:
        cout<<"Subtraction : "<<a-b<<endl;
        break;
        case 3:
        cout<<"Multiplication : "<<a*b<<endl;
        break;
        case 4:
        if(b!=0)
            cout<<"Division : "<<a/b<<endl;
        else
            cout<<"Division by zero is not allowed."<<endl;
        break;
        default:
        cout<<"Invalid choice."<<endl;
}
return 0;
}