Assignment of OOP1 on making a Basic Calculator

BasicCalculator.java

	package edu.univdhaka.iit.calculator;
	public class BasicCalculator {
		
		/**
		 * 
		 * Receives infinite parameter
		 * 
		 **/
		public double addition(int...a) {
			double sum=0;
			for(double i:a)
				sum=sum+i;
			return sum;
		}
		
		public double multiplication(int...a) {
			double result=1;
			for(double i:a)
				 result=(result*i);
			return result;
		}
		/**
		 * 
		 * Receives two parameter
		 * 
		 **/
		public int subtraction(int a, int b) {
			 return a - b;
		}
	
		public float division(int a, int b) {
			return (float)a/b;
		}
		
		public double power(int a,int b){
			return Math.pow(a,b);
		}
		/**
		 * 
		 * Receives one parameter
		 * 
		 **/
		public double percent(int a){
			return (double)a/100;
		}
		
		public double sqrt(int a){
			return Math.sqrt(a);
		}
		
		public double square(int a){
			return a*a;
		}
	}