Higher order callback

callBackFnPtr/callBackFnPtr.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+#include "def_callback.h"
+#include "reg_callback.h"
+
+
+int main()
+{
+	/*initialise function pointer to callback*/ 
+	cback cbPtr = cback_one;
+	printf("Callback demonstration\n");
+
+	/* register callback function */
+	printf("Value is: %d \n", register_cb(cbPtr)); 
+	printf("Demonstration complete\n");
+}
+
+

callBackFnPtr/def_callback.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+#include "def_callback.h"
+
+int cback_one(int n1, int n2) {
+	return n1 + n2; 
+}

callBackFnPtr/def_callback.h

@@ -0,0 +1 @@
+int cback_one(int, int); 

callBackFnPtr/reg_callback.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include "def_callback.h"
+#include "reg_callback.h"
+
+int register_cb(cback ptr_reg_callback) {
+	int r1; 
+	printf("Callback registration\n");
+
+	/*calling the callback */
+	r1 = (*ptr_reg_callback)(6, 13); 
+	return r1; 
+}
+
+

callBackFnPtr/reg_callback.h

@@ -0,0 +1,2 @@
+typedef int (*cback)(int, int);
+int register_cb(cback ptr_reg_callback);