Update Q4.c

Q4.c

@@ -1,6 +1,6 @@
 #include <stdio.h>
-#include <string.h>
 
+// union for book
 typedef union Book {
 	char title[50];
 	char author[50];
@@ -8,6 +8,8 @@ typedef union Book {
 	double price;
 } Book;
 
+//Print book details
+// Note that this is impossible since Book is a union, it cannot have all these details initialized at once
 void print_book(Book *book) {
 	printf("Title: %s\n", book->title);
 	printf("Author: %s\n", book->author);
@@ -15,6 +17,7 @@ void print_book(Book *book) {
 	printf("Price: %0.02f\n\n", book->price);
 }
 
+// Prints all books with price higher than threshold
 void print_books_higher_than_threshold(Book arr[], int len, double threshold) {
 	for(int i = 0; i < len; i++) {
 		if(arr[i].price > threshold) {
@@ -24,6 +27,7 @@ void print_books_higher_than_threshold(Book arr[], int len, double threshold) {
 }
 
 int main() {
+	// Books to test function
 	Book b1;
 	b1.price = 2.99;
 	Book b2;
@@ -37,9 +41,8 @@ int main() {
 
 	/* Ok so this kinda doesnt make sense. The threshold check only works if Book is set with a price. Kinda goes in
 	 * line with the fact that union doesnt make sense at all here
-	 * Also, when printing any book, since only 1 value is assigned (as its a UNION) the other fields are gibberish
-
-
+	 * Also, when printing any book, since only 1 value is assigned (as its a union) the other fields are gibberish
+	 * */
 	print_books_higher_than_threshold(arr, sizeof(arr)/sizeof(arr[0]), 10.0);
 
 }