typedef test

test.c

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

typedef int (*oper_cb)(int a, int b);

int add(int a, int b)
{
	return a + b;
}

int sub(int a, int b)
{
	return a - b;
}

int test_oper(int a, int b, oper_cb cb)
{
	return cb(a, b);
}

int main(int argc, char *argv[])
{
	printf("%d\n", test_oper(4, 3, add));
	printf("%d\n", test_oper(4, 3, sub));
	return 0;
}