fn_pointer_demo.c

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


int f1 (int x, int y) {
	return x + y;
}
int f2 (int x, int y) {
	return x - y;
}
typedef int (*binaryOp)(int, int);

void main() {
	binaryOp doWork = NULL;
	char c;
	printf("Please enter 1 or 2");
	scanf("%c", &c);
	if (c == '1') {
		doWork = f1;
	} else {
		doWork = f2;
	}

	printf("\nResult = %d", doWork(5, 5));
}