Update tutorial_32.java

simply-coded · web-flow · commit 452b09eb57b3 · 2021-02-26T18:47:49.000-06:00
Added option for random decimals
diff --git a/code/tutorial_32.java b/code/tutorial_32.java
@@ -47,6 +47,9 @@ else if (flipCoin == 2) {
             System.out.println("Tails!");
         }        
 
+        double decimalTest = rndRange(1, 5, 4);
+        System.out.println("Generated between 1 to 5 with 4 decimals is " + decimalTest);   
+
     }
 
     public static int rndRange(int start, int finish) {
@@ -58,5 +61,12 @@ public static int rndRange(int start, int finish) {
     public static int rndRange(int finish) {
         return rndRange(1, finish);
     }
+    
+    public static double rndRange(int start, int finish, int decimals) {
+        if (decimals < 0) decimals = 0;
+        return (
+            (new Random().nextInt(finish * (int)Math.pow(10, decimals) + 1 - start) + start) / Math.pow(10, decimals)
+        );
+    }
 
 }

Original file line number	Diff line number	Diff line change
`@@ -47,6 +47,9 @@ else if (flipCoin == 2) {`
`47`	`47`	`System.out.println("Tails!");`
`48`	`48`	`}`
`49`	`49`
	`50`	`+ double decimalTest = rndRange(1, 5, 4);`
	`51`	`+ System.out.println("Generated between 1 to 5 with 4 decimals is " + decimalTest);`
	`52`	`+`
`50`	`53`	`}`
`51`	`54`
`52`	`55`	`public static int rndRange(int start, int finish) {`
`@@ -58,5 +61,12 @@ public static int rndRange(int start, int finish) {`
`58`	`61`	`public static int rndRange(int finish) {`
`59`	`62`	`return rndRange(1, finish);`
`60`	`63`	`}`
	`64`	`+`
	`65`	`+ public static double rndRange(int start, int finish, int decimals) {`
	`66`	`+ if (decimals < 0) decimals = 0;`
	`67`	`+ return (`
	`68`	`+ (new Random().nextInt(finish * (int)Math.pow(10, decimals) + 1 - start) + start) / Math.pow(10, decimals)`
	`69`	`+ );`
	`70`	`+ }`
`61`	`71`
`62`	`72`	`}`