Added rounding

Calculator.java

@@ -0,0 +1,132 @@
+
+import java.util.*;
+class Calculator{
+    public static void main(String args[]){
+
+        String toDo;                //what the user wants to do
+        double num1 = 0;                //The user's first input
+        double num2 = 0;            //The user's second input
+        double result = 0;          //The user's answer
+        boolean off = false;        //The user typed quit, becomes true
+        double memory;
+        boolean error = false;
+        MathMethods calc = new MathMethods();
+
+        while (off == false){
+            Scanner input1 = new Scanner(System.in);
+            System.out.println("What do you want to do?");
+            toDo = input1.nextLine();
+
+            if (toDo.equals("quit")){
+                off = true;
+                System.out.println("Goodbye!!");
+
+            } else {
+
+                //System.out.println("toDO is: " + toDo);
+
+                System.out.println(toDo + " -- Enter first number:");
+                num1 = input1.nextDouble();
+                //System.out.println("num1 is: " + num1);
+
+                switch (toDo){
+                    case "add":
+                    case "subtract":
+                    case "multiply":
+                    case "divide":
+                    case "exponent":
+                    System.out.println(toDo + " -- Enter second number:");
+                    num2 = input1.nextDouble();
+                    //System.out.println("num2 is: " + num2);
+
+                }
+
+                switch (toDo) {        
+                    case "add":
+                    result = calc.add(num1, num2);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+
+                    case "subtract":
+                    result = calc.subtract(num1, num2);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+
+                    case "multiply":
+                    result = calc.multiply(num1, num2);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+
+                    case "divide":
+                    result = calc.divide(num1, num2);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+
+                    case "exponent":
+                    result = calc.exponent(num1, num2);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+
+                    case "cosine":
+                    result = calc.cosine(num1);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+
+                    case "inverse cosine":
+                    result = calc.invCosine(num1);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+
+                    case "square root":
+                    result = calc.squareRoot(num1);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+                    
+                    case "invert":
+                    result = calc.invert(num1);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+                    
+                    case "sine":
+                    result = calc.sin(num1);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+                    
+                    case "inverse sine":
+                    result = calc.iSin(num1);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+                    
+                    case "degree to radian":
+                    result = calc.degToRad(num1);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+                    
+                    case "radian to degree":
+                    result = calc.radToDeg(num1);
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+                    
+                    case "roundTo":
+                    memory = result;
+                    calc.roundTo(memory, (int)num1);
+                    break;
+                }
+            }
+
+        }
+    }
+}

Console.java

@@ -1,32 +0,0 @@
- 
-
-import java.util.Scanner;
-
-/**
- * Created by leon on 2/9/18.
- */
-public class Console {
-
-    public static void print(String output, Object... args) {
-        System.out.printf(output, args);
-    }
-
-    public static void println(String output, Object... args) {
-        print(output + "\n", args);
-    }
-
-    public static String getStringInput(String prompt) {
-        Scanner scanner = new Scanner(System.in);
-        println(prompt);
-        String userInput = scanner.nextLine();
-        return userInput;
-    }
-
-    public static Integer getIntegerInput(String prompt) {
-        return null;
-    }
-
-    public static Double getDoubleInput(String prompt) {
-        return null;
-    }
-}

MainApplication.java

@@ -1,17 +0,0 @@
- 
-
-/**
- * Created by leon on 2/9/18.
- */
-public class MainApplication {
-    public static void main(String[] args) {
-        Console.println("Welcome to my calculator!");
-        String s = Console.getStringInput("Enter a string");
-        Integer i = Console.getIntegerInput("Enter an integer");
-        Double d = Console.getDoubleInput("Enter a double.");
-
-        Console.println("The user input %s as a string", s);
-        Console.println("The user input %s as a integer", i);
-        Console.println("The user input %s as a d", d);
-    }
-}

MathMethods.java

@@ -0,0 +1,84 @@
+import java.util.*;
+/**
+ * Write a description of class Calculator here.
+ *
+ * @author (your name)
+ * @version (a version number or a date)
+ */
+public class MathMethods
+
+{
+
+    public static Double add(double n1, double n2){
+        return (n1 + n2);
+    }
+
+    public static Double subtract(double n1, double n2){
+        return (n1 - n2);
+    }
+
+    public static Double multiply(double n1, double n2){
+        return (n1 * n2);
+    }
+
+    public static Double divide(double n1, double n2){
+        return (n1 / n2);
+    }
+
+    public static Double exponent(double n1, double n2){
+        return (Math.pow(n1, n2));
+    }
+
+    public static Double cosine(double n1){
+        return (Math.cos(n1));
+    }
+
+    public static Double invCosine(double n1){
+        return (Math.acos(n1));
+    }
+
+    public static double squareRoot(double n1) {
+        return (Math.sqrt(n1));
+
+    }
+
+    public static double invert(double n1) {
+        return (n1*-1);
+
+    }
+
+    public static double sin(double n1){
+        return (Math.sin(n1));
+
+    }
+
+    public static double iSin(double n1){
+        return (Math.asin(n1));
+
+    }
+
+    public static double degToRad(double n1) {
+        return (Math.toRadians(n1));
+
+    }
+
+    public static double radToDeg(double n1) {
+        return (Math.toDegrees(n1));
+
+    }
+
+    
+    public static void printAns(String printAnswer){
+        System.out.println("ANSWER: " + printAnswer);
+
+    }
+    
+    public static void roundTo(Double memory, int numPlaces){
+
+        System.out.printf("ANSWER: %." + (numPlaces)+ "f\n", memory);
+
+    }
+    
+    
+
+}

package.bluej

@@ -1,20 +1,20 @@
 #BlueJ package file
-dependency1.from=MainApplication
-dependency1.to=Console
+dependency1.from=Calculator
+dependency1.to=MathMethods
 dependency1.type=UsesDependency
 editor.fx.0.height=722
 editor.fx.0.width=800
-editor.fx.0.x=640
-editor.fx.0.y=23
-objectbench.height=214
+editor.fx.0.x=0
+editor.fx.0.y=132
+objectbench.height=205
 objectbench.width=595
 package.divider.horizontal=0.6
-package.divider.vertical=0.6847360912981455
-package.editor.height=473
+package.divider.vertical=0.6849925705794948
+package.editor.height=454
 package.editor.width=493
 package.editor.x=35
-package.editor.y=60
-package.frame.height=759
+package.editor.y=23
+package.frame.height=731
 package.frame.width=619
 package.numDependencies=1
 package.numTargets=2
@@ -27,16 +27,16 @@ readme.width=47
 readme.x=10
 readme.y=10
 target1.height=50
-target1.name=Console
+target1.name=Calculator
 target1.showInterface=false
 target1.type=ClassTarget
-target1.width=80
-target1.x=80
-target1.y=200
+target1.width=120
+target1.x=70
+target1.y=70
 target2.height=50
-target2.name=MainApplication
+target2.name=MathMethods
 target2.showInterface=false
 target2.type=ClassTarget
-target2.width=120
-target2.x=70
-target2.y=70
+target2.width=110
+target2.x=80
+target2.y=200