回调函数实例—（二）

快来打我* 2021-11-22 17:54 223阅读 0赞

#include<stdio.h> //callbackTest.c //1.定义函数onHeight（回调函数） //@onHeight 函数名 //@height 参数 //@contex 上下文 void onHeight(double height, void *contex) { printf("current height is %lf", height); } //2.定义onHeight函数的原型 //@CallbackFun 指向函数的指针类型 //@height 回调参数，当有多个参数时，可以定义一个结构体 //@contex 回调上下文，在C中一般传入nullptr，在C++中可传入对象指针 typedef void (*CallbackFun)(double height, void *contex); //定义全局指针变量 CallbackFun m_pCallback; //定义注册回调函数 void registHeightCallback(CallbackFun callback, void *contex) { m_pCallback = callback; } //定义调用函数 void printHeightFun(double height) { m_pCallback(height, NULL); } //main函数 int main() { //注册回调函数onHeight registHeightCallback(onHeight, NULL); //打印height double h = 99; printHeightFun(99); } // --------------------- // 作者：Simon.Y // 来源：CSDN // 原文：https://blog.csdn.net/sinat_38183777/article/details/83958887 // 版权声明：本文为博主原创文章，转载请附上博文链接！

[https://segmentfault.com/a/1190000008293902?utm\_source=tag-newest][https_segmentfault.com_a_1190000008293902_utm_source_tag-newest]

[https://www.cnblogs.com/tinaluo/p/8327880.html][https_www.cnblogs.com_tinaluo_p_8327880.html]

[https://zhuanlan.zhihu.com/p/28300026][https_zhuanlan.zhihu.com_p_28300026]

[https://www.oschina.net/translate/visual-cpp-callback-function-example?print][https_www.oschina.net_translate_visual-cpp-callback-function-example_print]

转载于:https://www.cnblogs.com/CodeWorkerLiMing/p/11221959.html

[https_segmentfault.com_a_1190000008293902_utm_source_tag-newest]: https://segmentfault.com/a/1190000008293902?utm_source=tag-newest
[https_www.cnblogs.com_tinaluo_p_8327880.html]: https://www.cnblogs.com/tinaluo/p/8327880.html
[https_zhuanlan.zhihu.com_p_28300026]: https://zhuanlan.zhihu.com/p/28300026
[https_www.oschina.net_translate_visual-cpp-callback-function-example_print]: https://www.oschina.net/translate/visual-cpp-callback-function-example?print