C++ examples for Function:Function Pointer
Defining Pointers to Functions
#include <iostream> long sum(long a, long b); // Function prototype long product(long a, long b); // Function prototype int main() {//from ww w . j a va 2 s. co m long(*pDo_it)(long, long) {}; // Pointer to function pDo_it = product; std::cout << "3*5 = " << pDo_it(3, 5) << std::endl; // Call product thru a pointer pDo_it = sum; // Reassign pointer to sum() std::cout << "3 * (4+5) + 6 = " << pDo_it(product(3, pDo_it(4, 5)), 6) << std::endl; // Call thru a pointer twice } // Function to multiply two values long product(long a, long b) { return a*b; } // Function to add two values long sum(long a, long b) { return a + b; }