Here is a detailed Markdown blog post for the GeeksforGeeks problem:

Use Function Pointer to call the function

Summary

This problem requires using function pointers to dynamically invoke functions. The key concepts involved are function pointers, which allow you to store and execute a function at runtime.

Detailed Explanation

The problem can be thought of as having multiple functions with different parameters and return types. You need to write a program that takes an integer as input and calls the corresponding function based on this integer.

Here's how you can solve it:

First, create a function pointer array that stores all the available functions.
Then, for each function in the array, store its name and parameters (if any) along with the return type.
When you receive an input integer, use this integer to index into your function pointer array and call the corresponding function.

Here's a step-by-step breakdown of the solution:

Step 1: Create a function pointer array

import java.lang.reflect.Method; public class Main { public static void main(String[] args) throws Exception { // Create a method array Method[] methods = {fun1(), fun2()}; // Invoke the corresponding function based on input int input = 0; // or any other type of input methods[input].invoke(); } public static void fun1() { // Function implementation } public static void fun2() { // Function implementation } }