Added book examples

C16/alloc_example_4.c

@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void)
+{
+
+    // Declare an integer array and an integer pointer
+    int *pData;
+
+    // Using calloc (same approach malloc)
+    pData = calloc ( 10000 , sizeof (int));
+
+    if ( pData == NULL)
+    {
+        printf ("\nMemory could not be allocated - terminating");
+        return -1;  // Use minus one as we did not exit sucesfully
+    }
+
+     // We have our  memory, make use of it here!
+
+    // Free up the allocated memoey
+    free (pData);
+
+    return 0;   // Exit sucesfully
+}