#include <stdio.h>
#include <stdlib.h>

typedef int (*CompareFunc)(void*, void*);

int CompareVals(void* a, void* b, CompareFunc compare) {
	printf("CompareVals\n");
	return (*compare)(a, b);
}

typedef struct Foo {
	int x;
	int y;
} Foo;

int CompareFooFunc(void* a, void* b) {
	Foo* aa;
	Foo* bb;
	aa = (Foo*) a;
	bb = (Foo*) b;
	printf("CompareFoo func pointer\n");
	return 0;
}

int main(int argc, char *argv[]) {
	Foo a = {1, 2};
	Foo b = {1, 2};
	Foo c = {1, 3};
	int (*StackVariableCompare)(void*, void*);
	StackVariableCompare = CompareFooFunc;
	CompareFunc func = CompareFooFunc;
	printf("Return: %d\n", CompareVals(&a, &b, func));
	printf("Return: %d\n", CompareVals(&b, &c, CompareFooFunc));
	printf("Return: %d\n", CompareVals(&a, &b, StackVariableCompare));

}