//Lindo, Elleunice C.

//BSCS 3-5

//Create a calculator using at least 2 from the 4 pillars of OOP.

​

using System;

using System.IO;

using System. Linq;

using System.Collections.Generic;

namespace Simple_Calculator

{

public class Calculator

static void Main(string[] args)

{

ProgramName show = new ProgramName ("Calculator");

Consile.WriteLine(show.Pname);

Console.WriteLine("SELECT AN OPERATION");

Console.WriteLine("(+) (-) (*) (/)");

Console.writeLine ("Enter Operation:");

char Operation = char.Parse (Console .ReadLine());

info num1 = new info();

tech num2 = new tech();

Cal ops = new Cal();

if (Operation == '+') {

ops.add();

}

if (Operation == '-') {

ops.substract();

}

if (Operation == '*') {

ops.multiply();

}

if (Operation == '/') {

ops.divide();

}

}

}

​

class info

{

public double firstnum;

​

public double Firstnum

{

get { 

return firstnum;

}

set {

firstnum = value;

}

}

​

public double method2()

{

Console.WriteLine("Enter 1st number:");

Firstnum = Double.Parse(Console.ReadLine());

return Firstnum;

}

}

​

class tech

public double secondnum;

​

public double Secondnum

{

get {

return Secondnum;

}

set {

secondnum = value;

}

​

public double method3()

{

Console.WriteLine("Enter 2nd number:");

Secondnum = Double.Parse(Console.ReadLine());

return Secondnum;

}

​

class ProgramName

{

public string Pname;

public ProgramName (string name) {

Pname = name;

}

}

​

class Cal

{

public double answer;

info num1 = new info();

tech num2 = new tech();

​

public void add()

{

answer = (num1.method2() + num2.method3());

Console.WriteLine("+ ANSWER:");

Console.WriteLine(+answer);

}

public void subtract()

{

answer = (num1.method2() - num2.method3());

Console.WriteLine("+ ANSWER:");

Console.WriteLine(+answer);

}

public void multiply()

{

answer = (num1.method2() * num2.method3());

Console.WriteLine("+ ANSWER:");

Console.WriteLine(+answer);

}

public void divide()

{

answer = (num1.method2() / num2.method3());

Console.WriteLine("+ ANSWER:");

Console.WriteLine(+answer);

}

}

​

​