#include <stdio.h>

void add_001(int *summand1, int *summand2, int *sum)
{
	*sum = *summand1 + *summand2;
}

void add_010(int *summand1, int *summand2, int *sum)
{
	*summand2 = *sum - *summand1;
}

void add_100(int *summand1, int *summand2, int *sum)
{
	*summand1 = *sum - *summand2;
}

void (*add_modes[2][2][2])(int *summand1, int *summand2, int *sum) = {
	NULL, add_001, add_010, NULL, add_100, NULL, NULL, NULL
};

int main(int argc, char **argv)
{
	int a=1, b=2, c;
	//(*add_modes[0][0][1])(&a, &b, &c);
	printf("%d", c);
}