ZCW-MacroLabs-OOP-ScientificCalculator/Basic.java

/**
 * 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()
    {
        //a check to make sure user input is valid.
        boolean validInput = false;
        
        while(!validInput) {
        //Get input of first number
        input1 = Console.getIntegerInput("What is the first number?");
            
        //Get input of operation
        String operation = Console.getStringInput("Which operation would you like to perform? \n +, -, *, /");
  
        //Get input of second number
        input2 = Console.getIntegerInput("What is the second number?");
        
        //Do the math depending on the inputs.
        //addition
        if (operation.equals("+")) {
            answer = input1 + input2;
            Console.println(Double.toString(answer));
            validInput = true;
        
        //subtraction    
        } else if (operation.equals("-")) {
            answer = input1 - input2;
            Console.println(Double.toString(answer));
            validInput = true;
        
        //multiplication
        } else if (operation.equals("*")) {
            answer = input1 * input2;
            Console.println(Double.toString(answer));
            validInput = true;
            
        //division    
        } else if (operation.equals("/")) {
            //error message when trying to divide by 0.
            if (input2 == 0) {
                Console.println("undefined");
                //Insert return to main menu.
            } else {
            answer = input1 / input2;
            Console.println(Double.toString(answer));
            validInput = true;
        }
        } else {
            //error if wrong input was entered
            Console.println("Error, try again \n");
            
    }
    
}
         //Insert return to main menu.
}
}