Function pointer in C++ is very useful as it can be passed as a parameter to a different function, thus making the functionality of callbacks easy to implement in C++.Where void is the function’s return type. *fun_ptr is a pointer to a function that takes one int argument. It’s as if we are declaring a function called *fun_ptr which takes int and returns void.
Q.) W.A.P to initialize pointer with function.
#include < iostream>
using namespace std;
int add(int a , int b)
{
return a+b;
}
int main()
{
int (*funcptr)(int,int); // function pointer declaration
funcptr=add; // funcptr is pointing to the add function
int sum=funcptr(5,5);
std::cout << "value of sum is :" << sum<< std::endl;
return 0;
}
