StackOverflow Function Pointers

function-pointers.c

//
//  main.c
//  ObviousHomeworkFucboi
//
//  Created by Can on 3/9/15.
//  Copyright (c) 2015 Can. All rights reserved.
//

#include <stdio.h>

typedef int (*operation)(int, int);

int add(int a, int b) { return a+b; }
int substract(int a, int b) { return a-b; }
int multiply(int a, int b) { return a*b; }
int divide(int a, int b) { return a/b; }

operation operations[] = {add, substract, multiply, divide};

enum OperationIndex
{
    Addition = 1,
    Substraction,
    Multiplication,
    Division
};

int operate(enum OperationIndex type, int left, int right)
{
    operation selected = operations[(type-1)%4];
    
    return (*selected)(left, right);
}

int main(int argc, const char * argv[])
{
    printf("%d", operate(Addition, 2, 4));
    
    return 0;
}