src/com/company/Calc.java

@@ -0,0 +1,42 @@
+package com.company;
+
+public class Calc {
+    int num1;
+    int num2;
+
+
+    public static String main(String op,int num1,int num2) {
+
+        return "";
+    }
+
+    //math functions
+    public static void print(String text){
+        System.out.println(text);
+    }
+    public static int add(String num1, String num2){
+        int add1 = Integer.parseInt(num1);
+        int add2 = Integer.parseInt(num2);
+        return add1 + add2;
+    }
+    public static int sub(String num1, String num2){
+        int sub1 = Integer.parseInt(num1);
+        int sub2 = Integer.parseInt(num2);
+        return sub1 - sub2;
+    }
+    public static int mul(String num1, String num2){
+        int mul1 = Integer.parseInt(num1);
+        int mul2 = Integer.parseInt(num2);
+        return mul1 * mul2;
+    }
+    public static int div(String num1, String num2){
+        int div1 = Integer.parseInt(num1);
+        int div2 = Integer.parseInt(num2);
+        if (div2 == 0 || div1 == 0){
+            print("cant divide by zero");
+            return -1;
+        }
+        return div1 / div2;
+    }
+
+}

src/com/company/Main.java

@@ -4,65 +4,47 @@ import java.util.Scanner;
 
 public class Main {
     @SuppressWarnings("InfiniteLoopStatement")
-    public static void main(String[] args)
-    {
-        while(true) {
+    public static void main(String[] args) {
+        int total = 0;
+        String num1;
+        String num2;
+        while (true) {
+
             Scanner in = new Scanner(System.in);
-            print("Enter first number: ");
-            String num1 = in.nextLine();
-            print("please enter second number");
-            String num2 = in.nextLine();
-            print("Inputs complete");
-            print("Please input operator");
-            print("+ , - , * or x , /");
+            System.out.println("Enter first number: ");
+            num1 = in.nextLine();
+            if (num1.equals("ans") || num1.equals("total")) {
+                num1 = String.valueOf(total);
+            }
+            System.out.println("please enter second number");
+            num2 = in.nextLine();
+            if (num2.equals("ans") || num2.equals("total")) {
+                num2 = String.valueOf(total);
+            }
+                System.out.println("Inputs complete");
+                System.out.println("Please input operator");
+                System.out.println("+ , - , * or x , /");
                 String op = in.nextLine();
 
                 switch (op) {
                     case "+" -> {
-                    int total = add(num1, num2);
+                        total = Calc.add(num1, num2);
                         System.out.println(total);
                     }
                     case "-" -> {
-                    int total = sub(num1, num2);
+                        total = Calc.sub(num1, num2);
                         System.out.println(total);
                     }
                     case "*", "x" -> {
-                    int total = mul(num1, num2);
+                        total = Calc.mul(num1, num2);
                         System.out.println(total);
                     }
                     case "/" -> {
-                    int total = div(num1, num2);
+                        total = Calc.div(num1, num2);
                         System.out.println(total);
                     }
-                default -> print("Unexpected value: " + op + " ...restarting program");
+                    default -> System.out.println("Unexpected value: " + op + " ...restarting program");
                 }
         }
     }
-    private static void print(String text){
-        System.out.println(text);
-    }
-    private static int add(String num1, String num2){
-        int add1 = Integer.parseInt(num1);
-        int add2 = Integer.parseInt(num2);
-        return add1 + add2;
-    }
-    private static int sub(String num1, String num2){
-        int sub1 = Integer.parseInt(num1);
-        int sub2 = Integer.parseInt(num2);
-        return sub1 - sub2;
-    }
-    private static int mul(String num1, String num2){
-        int mul1 = Integer.parseInt(num1);
-        int mul2 = Integer.parseInt(num2);
-        return mul1 * mul2;
-    }
-    private static int div(String num1, String num2){
-        int div1 = Integer.parseInt(num1);
-        int div2 = Integer.parseInt(num2);
-        if (div2 == 0 || div1 == 0){
-            print("cant divide by zero");
-            return -1;
-        }
-        return div1 / div2;
-    }
 }