Completing Exercise 3.3 of the ThinkJava book

olliviergassant · olliviergassant · commit 883307d70402 · 2025-08-11T10:08:40.000-04:00
Created ascript that took a user input, compared it to a random numeber
from 1-100 and calcualted the difference between the two.
diff --git a/ch03/Exercise_3_2.java b/ch03/Exercise_3_2.java
@@ -1,9 +1,26 @@
 import java.util.Scanner;
 
 public class Exercise_3_2 {
-
+    
     public static void main(String[] args) {
+        //initialize the Scanner
+        Scanner in = new Scanner(System.in);
+        final double nineDivFive = 1.8;
+
+        //Prompts Person inputs a temperature in Celsius
+        System.out.print("Enter a temperature in Celsius: ");
+        
+        //Take the input
+        double tempInput = in.nextDouble();
         
+        //Check for the proper input from tempInput 
+        System.out.printf("User input = %f\n", tempInput);
+
+        //Calculation. I used an assigned value for the 9/5 part of the conversion. since it doesn't change
+        final double fahCalc = tempInput * nineDivFive + 32.0;
+
+       //Check for the proper input from tempInput 
+        System.out.printf("Final calculation are as follows %.1f C = %.1f F", tempInput, fahCalc); 
     }
 
 }   
diff --git a/ch03/Exercise_3_3.java b/ch03/Exercise_3_3.java
@@ -0,0 +1,30 @@
+import java.util.Scanner;
+import java.util.Random;
+
+
+public class Exercise_3_3 {
+    
+    public static void main(String[] args) {
+    // importing the random module
+    Random random = new Random();
+    int number = random.nextInt(100) + 1;
+    // System.out.println(number);
+    
+    // importing the ability to get user input
+    Scanner in = new Scanner(System.in);
+
+    // Initial prompt to user and input to their number
+    System.out.println("I'm thinking of a number between 1 and 100.\nCan you guess what it is?");
+    System.out.print("Type a number: ");
+    int userInput = in.nextInt();
+    System.out.printf("Your guess is: %d\n", userInput);
+    System.out.printf("The number I was thinking of is: %d\n", number);
+
+    // Calculating how much they were off by
+    int calc = (number - userInput);
+
+    // Telling the user how much they were off by
+    System.out.printf("You were off by: %d ", calc);
+    }
+
+}
