calculator

import java.util.Scanner;
public class Calculator {
	public static void main(String[]args)
	{
		Numeric another=new Numeric();
		Scanner keyboard=new Scanner(System.in);
		String a , b, op;


		double c=0;

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

			if(Numeric.isNumeric(a))
			{
				if(Numeric.isInteger(a))
				{

					b=keyboard.next();
					int B=Integer.parseInt(b);
					int A=Integer.parseInt(a);
					if(op.equals("+"))
					{
						c=B+A;

					}
					if(op.equals("-"))
					{
						c=B-A;
					}
					//etc
				}
				else if(Numeric.isDouble(a))
				{

				}
			}
			else
			{
				if(a.equals("sin"))
				{
					double OP=Double.parseDouble(op);
					c=Math.sin(OP);
				}
				else if(a.equals("cos"))
				{
					double OP=Double.parseDouble(op);
					c=Math.cos(OP);
				}
				//etc
			}

			System.out.println(c);
		}
		while(true);
	}
}