Project #4

Code

//Colin Hinton
//5th Period
//Calc.java
//3/9/2016

import java.util.Scanner;
public class Calc
{
    public static void main(String[] args)
    {
        Scanner keyboard = new Scanner(System.in);

		double a, b, c;
		String op;

		do
		{
			System.out.print("> ");
			a  = keyboard.nextDouble();
			op = keyboard.next();
			b  = keyboard.nextDouble();

			
            if ( op.equals("+") )
				System.out.println(Add(a,b));
			else if (op.equals("-"))
                System.out.println(Sub(a,b));
            else if (op.equals("*"))
                System.out.println(Mul(a,b));
            else if (op.equals("/"))
                System.out.println(Div(a,b));
            else if (op.equals("^")) //write your own
                System.out.println(Exp(a,b));
            else if (op.equals("%"))
                System.out.println(Mod(a,b));
            else if (op.equals("!"))
                System.out.println(Fac(a));
            else if (op.equals("sin"))
                System.out.println(Sin(b));
            else if (op.equals("cos"))
                System.out.println(Cos(b));
            else if (op.equals("tan"))
                System.out.println(Tan(b));
            else if (op.equals("(-)"))
                System.out.println(Neg(b));
            else 
			{
				System.out.println("Undefined operator: '" + op + "'.");
				
			}

			

		} while ( a != 0 );
        
        }
        
        public static Double Add(Double c, Double d)
        {
            Double e = c + d;
            return e;
        }
        public static Double Sub(Double c, Double d)
        {
            Double e = c - d;
            return e;
        }
        public static Double Mul(Double c, Double d)
        {
            Double e = c*d;
            return e;
        }
        public static Double Div(Double c, Double d)
        {
            Double e = c/d;
            return e;
        }
        public static Double Exp(Double c, Double d) //without Math.pow
        {
            Double pow = c;
            for(int x=1;x 1; x = x - 1)
                {
                    c = c*(x-1);
                }
            return c;
        }
        public static Double Sin(Double d)
        {
            Double e = Math.sin(d);
            return e;
        }
        public static Double Cos(Double d)
        {
            Double e = Math.cos(d);
            return e;
        }
        public static Double Tan(Double d)
        {
            Double e = Math.tan(d);
            return e;
        }
        public static Double Neg(Double d)
        {
            Double e = 0 - d;
            return e;
        }
        
    }
    
Picture of the output