block与函数指针的实例化

一：block

1.定义block

typedef void(^CallBackBlock)(int a, int b);

typedef int(^CallBackBlock1)(int a, int b);

2.实例化block

CallBackBlock block = ^(int a, int b){};

CallBackBlock1 block1 =int^(int a, int b){};

3.调用block

block(m,n);

block1(m,n);

二：函数指针

1.定义函数指针

typedef void(*CallBack)(int a, int b);

typedef int(*CallBack1)(int a, int b);

2.实例化函数指针

void CallBackFun (int a, int b)

{

}

int CallBack1Fun (int a, int b)

{

return 1;

}

CallBack back = CallBackFun;

CallBack1 back1 = CallBack1Fun;

3.执行

back(m,n);

back1(m,n);