Added book examples

C9/infinite_while_loop.c

@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void)
+{
+	int age ;  	// Declare variable, no need to initialise this time 
+				// as the test condition is not based on its value
+    
+    // This is always non-zero, the loop will never break
+    while ( 1 )
+    {
+        // Code in {} executed if condition is true (non-zero)
+        
+        printf ("\nPlease enter your age");
+        scanf("%d", &age);
+        printf ("You are %d years old\n", age);    
+        
+        // Code  now goes back and repeats 
+        // as the conditions is always non-zero (true)
+    }
+    
+    return 0;	// Exit code
+}