src/com/company/Calc.java

@@ -1,37 +1,33 @@
 package com.company;
 
+
 public class Calc {
+    //constructor of num variables
     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){
+    public static double add(String num1, String num2){
-        int add1 = Integer.parseInt(num1);
+        double add1 = Double.parseDouble(num1);
-        int add2 = Integer.parseInt(num2);
+        double add2 = Double.parseDouble(num2);
         return add1 + add2;
     }
-    public static int sub(String num1, String num2){
+    public static double sub(String num1, String num2){
-        int sub1 = Integer.parseInt(num1);
+        double sub1 = Double.parseDouble(num1);
-        int sub2 = Integer.parseInt(num2);
+        double sub2 = Double.parseDouble(num2);
         return sub1 - sub2;
     }
-    public static int mul(String num1, String num2){
+    public static double mul(String num1, String num2){
-        int mul1 = Integer.parseInt(num1);
+        double mul1 = Double.parseDouble(num1);
-        int mul2 = Integer.parseInt(num2);
+        double mul2 = Double.parseDouble(num2);
         return mul1 * mul2;
     }
-    public static int div(String num1, String num2){
+    public static double div(String num1, String num2){
-        int div1 = Integer.parseInt(num1);
+        double div1 = Double.parseDouble(num1);
-        int div2 = Integer.parseInt(num2);
+        double div2 = Double.parseDouble(num2);
         if (div2 == 0 || div1 == 0){
             print("cant divide by zero");
             print("error code:");

src/com/company/Main.java

@@ -5,7 +5,7 @@ import java.util.Scanner;
 public class Main {
     @SuppressWarnings("InfiniteLoopStatement")
     public static void main(String[] args) {
-        int total = 0;
+        double total = 0;
         String num1;
         String num2;
         while (true) {