Add Q4.c

Q4.c

@@ -0,0 +1,45 @@
+#include <stdio.h>
+#include <string.h>
+
+typedef union Book {
+	char title[50];
+	char author[50];
+	int pages;
+	double price;
+} Book;
+
+void print_book(Book *book) {
+	printf("Title: %s\n", book->title);
+	printf("Author: %s\n", book->author);
+	printf("Number of Pages: %d\n", book->pages);
+	printf("Price: %0.02f\n\n", book->price);
+}
+
+void print_books_higher_than_threshold(Book arr[], int len, double threshold) {
+	for(int i = 0; i < len; i++) {
+		if(arr[i].price > threshold) {
+			print_book(&arr[i]);
+		}
+	}
+}
+
+int main() {
+	Book b1;
+	b1.price = 2.99;
+	Book b2;
+	b2.price = 19.99;
+	Book b3;
+	b3.price = 99.99;
+	Book b4;
+	b4.price= 9.99;
+
+	Book arr[] = {b1, b2, b3, b4};
+
+	/* 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
+
+
+	print_books_higher_than_threshold(arr, sizeof(arr)/sizeof(arr[0]), 10.0);
+
+}