New Calculator

by fredericklim

HTML

<p id="sum"></p>
<p id="mul"></p>

JavaScript

/* function Calculator() {
   this.a = 0;
   this.b = 0;
}

function read() {
   this.a = prompt("Input first value");
   this.b = prompt("Input second value");
}

function sum() {
   return parseInt(this.a) + parseInt(this.b);
}

function mul() {
   return this.a * this.b;
}

let calculator = new Calculator();
calculator.read = read;
calculator.sum = sum;
calculator.mul = mul; */

function Calculator() {
	this.read = function() {
		this.a = +prompt("Input first value", 0);
		this.b = +prompt("Input second value", 0);
   };
   this.sum = function() {
   	return this.a + this.b;
   };
   this.mul = function() {
   	return this.a * this.b;
   };
}

let calculator = new Calculator();
calculator.read();

document.getElementById("sum").innerHTML = "Sum=" + calculator.sum();
document.getElementById("mul").innerHTML = "Mul=" + calculator.mul();