code snippet

c.m

//
//  main.m
//  BlockPlayground
//
//  Created by Keqiu Hu on 3/20/17.
//  Copyright © 2017 LinkedIn. All rights reserved.
//

#import <Foundation/Foundation.h>

typedef void (^block_t)(void);

void func(block_t block) {
    if (block) {
        block();
    }
}

void foo(int param) {
    int x0 = param;
//     block_t block = ^{
//         int y0 = x0;
//         printf("Hello block 1\n");
//         printf("Address of auto y0: %p\n", &y0);
//         printf("Address of captured x0: %p\n", &x0);
//     };
//     func(block);
   func(^{
       int y0 = x0;
       printf("Hello block 1\n");
       printf("Address of auto y0: %p\n", &y0);
       printf("Address of captured x0: %p\n", &x0);
   });
}

int main(int argc, const char * argv[]) {
    foo(10);
    return 0;
}