#include <iostream>
using namespace std;

int addInt(int n, int m){
    return n + m;
}

int timeInt(int n, int m){
    return n * m;
}

int calTwoNumbers(int(*functionPtr)(int,int),int n, int m){
    return functionPtr(n,m);
}

int main(){

/************** function pointer - function as parameters *****************/
    int sum = 0;

    // declare function pointer
    int (*functionPtr)(int,int);

    // pass function as parameters:
    sum = calTwoNumbers(addInt,2,3);
    printf("%d\n",sum); // 2 + 3 = 5
    sum = calTwoNumbers(timeInt,2,3);
    printf("%d\n",sum); // 2 * 3 = 6

    return 0;
}