ZCW-MacroLabs-OOP-ScientificCalculator/Basic.java

import java.util.Scanner;

/**
 * Basic class to perform basic functions for our Graphing Calculator
 * (+, -, *, /)
 * Lauren Green
 * 10/19/18
 */
public class Basic
{
    int input1 = 0;
    int input2 = 0;
    int answer;
    
    public Basic()
    {
        boolean validInput = false;
        
        while(!validInput) {
        //Get input of first number
        Scanner in2 = new Scanner(System.in);
        System.out.println("What is the first number?");
        input1 = in2.nextInt();
            
        //Get input of type of function
        Scanner in1 = new Scanner(System.in);
        System.out.println("Which operation would you like to perform? \n +, -, *, /");
        String operation = in1.nextLine(); 
  
        //Get input of second number
        Scanner in3 = new Scanner(System.in);
        System.out.println("What is the second number?");
        input2 = in3.nextInt();
        
        //Do the math depending on the input.
        if (operation.equals("+")) {
            answer = input1 + input2;
            System.out.println(answer);
            validInput = true;
            
        } else if (operation.equals("-")) {
            answer = input1 - input2;
            System.out.println(answer);
            validInput = true;
            
        } else if (operation.equals("*")) {
            answer = input1 * input2;
            System.out.println(answer);
            validInput = true;
            
        } else if (operation.equals("/")) {
            answer = input1 / input2;
            System.out.println(answer);
            validInput = true;
            
        } else {
            System.out.println("Error, try again \n");
            
    }
}
    //Insert return to main menu.
}
}