#include using namespace std; class functions{ public: void Body() { cout << " :: Welcome to Peetam Dhangar's CALCULATOR! ::" << endl; } int Addition(int x, int y){ int ans = x + y; return ans; } int Subtraction(int x, int y){ int ans = x - y; return ans; } int Multiplication(int x, int y){ int ans = x * y; return ans; } int Division(int x, int y){ int ans = x / y; return ans; } }; int main(){ int func; int x, y; functions key; //Object key.Body(); //Object cout << "What function do you want to use? " << endl; cout << "1 - Addition " << endl; cout << "2 - Subtraction " << endl; cout << "3 - Multiplication " << endl; cout << "4 - Division " << endl; cout << "Input: " << endl; cin >> func; cout << endl; switch(func) { case 1: //Addition cout << "**ADDITION**" << endl; cout << "Please enter first number: " << endl; cin >> x; cout << "Please enter second number: " << endl; cin >> y; cout << x << " + " << y << " = "; cout << key.Addition(x, y); break; case 2: //Subtraction cout << "**SUBTRACTION**" << endl; cout << "Please enter first number: " << endl; cin >> x; cout << "Please enter second number: " << endl; cin >> y; cout << x << " - " << y << " = "; cout << key.Subtraction(x, y); break; case 3: //Multiplication cout << "**MULTIPLICATION**" << endl; cout << "Please enter first number: " << endl; cin >> x; cout << "Please enter second number: " << endl; cin >> y; cout << x << " x " << y << " = "; cout << key.Multiplication(x, y); break; case 4: //Division cout << "**DIVISION**" << endl; cout << "Please enter first number: " << endl; cin >> x; cout << "Please enter second number: " << endl; cin >> y; cout << x << " / " << y << " = "; cout << key.Division(x, y); break; default: cout << "Invalid Input..."; break; } }

simple calculator using class & object