OC得Block语法使用

////  main.m//  Block////  Created by Rayln Guan on 8/29/13.//  Copyright (c) 2013 Rayln Guan. All rights reserved.//#import <Foundation/Foundation.h>typedef int (^MySum) (int, int);void test1(){    int (^Sum) (int, int) = ^(int a, int b){        return a + b;    };    NSLog(@"%i", Sum(2, 3));}void test2(){    MySum sum = ^(int a, int b){        return a + b;    };    NSLog(@"%i", sum(10, 2));}int main(int argc, const char * argv[]){    @autoreleasepool {        test1();        test2();            }    return 0;}