Hello everyone, I am new here and I am looking for help on a small assignment I have. It is a simple calculator which performs basic arithmetic operations (+ - / * power and square root) and I am having trouble with making so that once a user has performed a calculation, the calculator will continue and use the result of the last equation as the new first operand and prompt the user for a new operator and second operand. This will continue in a loop until the user enters 'q' as an operator to quit. As well I need to make it so when the user enters 'c' the accumulator will clear and the calculator resets asking the user to enter the first number.

I've got everything else in my code I just cant wrap my head around how to do those two things.

Code :

package simlpecalculator; /** * FileName: simpleCalculator.java * @author XXXXXXX * Date: January 13, 2010 * Description: A simple calculator program used to perform basic arithmetic operations */ import java.util.Scanner; public class Main { /** * @param args the command line arguments */ public static void main(String[] args) { // variables double frstNum = 0, scndNum = 0, ans = 0; String operator = " "; // create input object Scanner keyboard = new Scanner(System.in); while (!operator.equals("q")){ // loop to continue application process until user quits. // obtain the first number and operator System.out.println(); System.out.println("Enter the first number: "); frstNum = keyboard.nextDouble(); System.out.println(); // white space System.out.println("Enter an operator: "); operator = keyboard.next(); System.out.println(); // white space // quit the application if operator entered is 'q' // if not continue application processes if (operator.equals("q")){ System.out.println("End of program"); } else{ if (operator.equals("s")){ // check to see if user desires square root ans = Math.sqrt(frstNum); // take the square root of the first number } else{ // if user does not need square root, prompt for second number System.out.println("Enter the second number: "); scndNum = keyboard.nextDouble(); } System.out.println(); // white space if (operator.equals("+")){ // perform addition ans = frstNum + scndNum; } else if (operator.equals("-")){ // perform subtraction ans = frstNum - scndNum; } else if (operator.equals("*")){ // perform multiplication ans = frstNum * scndNum; } else if (operator.equals("/")){ // perform division ans = frstNum / scndNum; } else if (operator.equals("p")){ // take the power of a number ans = Math.pow(frstNum, scndNum); } System.out.println("Your result is: " + ans); } } } }