#include <stdio.h>
    int main (int argc, char const *argv[]) {
        int (^add)(int, int) = ^(int x, int y) {
            return x + y;
        };
        int (^max)(int, int) = ^(int x, int y) {
            return (x > y) ? x : y;
        };
        printf("block: add:%d\n", add(2,3));
        printf("block: max:%d\n", max(2,3));
        return 0;
    }