\u6211\u4eec\u90fd\u77e5\u9053\uff0cC++\u624d\u662f\u9762\u5411\u5bf9\u8c61\u7684\u8bed\u8a00\uff0c\u4f46\u662fC\u8bed\u8a00\u662f\u5426\u80fd\u4f7f\u7528\u9762\u5411\u5bf9\u8c61\u7684\u529f\u80fd\uff1f<\/p>\n
\uff081\uff09\u7ee7\u627f\u6027<\/p>\n
typedef struct _parent
\n{
\nint data_parent;
\n}Parent;
\ntypedef struct _Child
\n{
\nstruct _parent parent;
\nint data_child;
\n}Child;<\/p>\n
\u5728\u8bbe\u8ba1C\u8bed\u8a00\u7ee7\u627f\u6027\u7684\u65f6\u5019\uff0c\u6211\u4eec\u9700\u8981\u505a\u7684\u5c31\u662f\u628a\u57fa\u7840\u6570\u636e\u653e\u5728\u7ee7\u627f\u7684\u7ed3\u6784\u7684\u9996\u4f4d\u7f6e\u5373\u53ef\u3002\u8fd9\u6837\uff0c\u4e0d\u7ba1\u662f\u6570\u636e\u7684\u8bbf\u95ee\u3001\u6570\u636e\u7684\u5f3a\u8f6c\u3001\u6570\u636e\u7684\u8bbf\u95ee\u90fd\u4e0d\u4f1a\u6709\u4ec0\u4e48\u95ee\u9898\u3002<\/p>\n
\uff082\uff09\u5c01\u88c5\u6027<\/p>\n
class\u7684\u7c7b\u6210\u5458\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u90fd\u662fprivate\uff0c\u800cstruct\u7684\u6210\u5458\u90fd\u662fpublic\uff08\u4e0d\u80fd\u6539\u53d8\uff09\uff0c\u6240\u4ee5\u5982\u4f55\u8ba9C\u8bed\u8a00\u5b9e\u73b0\u5c01\u88c5\u7684\u529f\u80fd\u5462\uff1f\u7b54\u6848\u5c31\u662f\u51fd\u6570\u6307\u9488\uff1b\u8fd9\u5728\u5185\u6838\u4e2d\u5f97\u5230\u4e86\u5e7f\u6cdb\u7684\u5e94\u7528\uff1b<\/p>\n
struct _Data;
\ntypedef\u00a0 void (*process)(struct _Data* pData);
\ntypedef struct _Data
\n{
\nint value;
\nprocess pProcess;
\n}Data;<\/p>\n
\u5c01\u88c5\u6027\u7684\u610f\u4e49\u5728\u4e8e\uff0c\u51fd\u6570\u548c\u6570\u636e\u662f\u7ed1\u5728\u4e00\u8d77\u7684\uff0c\u6570\u636e\u548c\u6570\u636e\u662f\u7ed1\u5728\u4e00\u8d77\u7684\u3002\u8fd9\u6837\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684\u4e00\u4e2a\u7ed3\u6784\u6307\u9488\u8bbf\u95ee\u5230\u6240\u6709\u7684\u6570\u636e\uff0c\u904d\u5386\u6240\u6709\u7684\u51fd\u6570\u3002\u5c01\u88c5\u6027\uff0c\u8fd9\u662f\u7c7b\u62e5\u6709\u7684\u5c5e\u6027\uff0c\u5f53\u7136\u4e5f\u662f\u6570\u636e\u7ed3\u6784\u4f53\u62e5\u6709\u7684\u5c5e\u6027\u3002<\/p>\n
\uff083\uff09\u591a\u6001\u6027<\/p>\n
\u5728C++\u4e2d\uff0c\u591a\u6001\u901a\u5e38\u90fd\u662f\u4f7f\u7528\u865a\u51fd\u6570\u6765\u5b9e\u73b0\u7684\uff0c\u4f46\u662fC\u8bed\u8a00\u4e2d\u5e76\u6ca1\u6709\u865a\u51fd\u6570\uff0c\u5982\u4f55\u5b9e\u73b0\u91cd\u8f7d\u5462\uff1f<\/p>\n
\u7b54\u6848\u4e5f\u663e\u800c\u6613\u89c1\uff0c\u4e5f\u662f\u51fd\u6570\u6307\u9488\u7684\u6269\u5c55\uff0c\u4ee5\u4e0b\u9762\u4f8b\u5b50\u4e3a\u4f8b\uff1a<\/p>\n
#include <stdio.h>
\n#include <stdlib.h><\/p>\n
\/\/\u865a\u51fd\u6570\u8868\u7ed3\u6784
\nstruct base_vtbl
\n{
\nvoid(*dance)(void *);
\nvoid(*jump)(void *);
\n};<\/p>\n
\/\/\u57fa\u7c7b
\nstruct base
\n{
\n\/*virtual table*\/
\nstruct base_vtbl *vptr;
\n};<\/p>\n
void base_dance(void *this)
\n{
\nprintf(“base dance\\n”);
\n}<\/p>\n
void base_jump(void *this)
\n{
\nprintf(“base jump\\n”);
\n}<\/p>\n
\/* global vtable for base *\/
\nstruct base_vtbl base_table =
\n{
\nbase_dance,
\nbase_jump
\n};<\/p>\n
\/\/\u57fa\u7c7b\u7684\u6784\u9020\u51fd\u6570
\nstruct base * new_base()
\n{
\nstruct base *temp = (struct base *)malloc(sizeof(struct base));
\ntemp->vptr = &base_table;
\nreturn temp;
\n}
\n\/\/\u6d3e\u751f\u7c7b
\nstruct derived1
\n{
\nstruct base super;
\n\/*derived members *\/
\nint high;
\n};<\/p>\n
void derived1_dance(void * this)
\n{
\n\/*implementation of derived1’s dance function *\/
\nprintf(“derived1 dance\\n”);
\n}<\/p>\n
void derived1_jump(void * this)
\n{
\n\/*implementation of derived1’s jump function *\/
\nstruct derived1* temp = (struct derived1 *)this;
\nprintf(“derived1 jump:%d\\n”, temp->high);
\n}<\/p>\n
\/*global vtable for derived1 *\/
\nstruct base_vtbl derived1_table =
\n{
\n(void(*)(void *))&derived1_dance,
\n(void(*)(void *))&derived1_jump
\n};<\/p>\n
\/\/\u6d3e\u751f\u7c7b\u7684\u6784\u9020\u51fd\u6570
\nstruct derived1 * new_derived1(int h)
\n{
\nstruct derived1 * temp= (struct derived1 *)malloc(sizeof(struct derived1));
\ntemp->super.vptr = &derived1_table;
\ntemp->high = h;
\nreturn temp;
\n}<\/p>\n
<\/p>\n
int main(void)
\n{<\/p>\n
struct base * bas = new_base();
\n\/\/\u8fd9\u91cc\u8c03\u7528\u7684\u662f\u57fa\u7c7b\u7684\u6210\u5458\u51fd\u6570
\nbas->vptr->dance((void *)bas);
\nbas->vptr->jump((void *)bas);
\nstruct derived1 * child = new_derived1(100);
\n\/\/\u57fa\u7c7b\u6307\u9488\u6307\u5411\u6d3e\u751f\u7c7b
\nbas\u00a0 = (struct base *)child;<\/p>\n
\/\/\u8fd9\u91cc\u8c03\u7528\u7684\u5176\u5b9e\u662f\u6d3e\u751f\u7c7b\u7684\u6210\u5458\u51fd\u6570
\nbas->vptr->dance((void *)bas);
\nbas->vptr->jump((void *)bas);
\nreturn 0;
\n}<\/p>\n
\u7efc\u4e0a\u6240\u8ff0\uff0c\u53ef\u4ee5\u5b9e\u73b0C\u8bed\u8a00\u7684\u9762\u5411\u5bf9\u8c61\u529f\u80fd\uff1b<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6211\u4eec\u90fd\u77e5\u9053\uff0cC++\u624d\u662f\u9762\u5411\u5bf9\u8c61\u7684\u8bed\u8a00\uff0c\u4f46\u662fC\u8bed\u8a00\u662f\u5426\u80fd\u4f7f\u7528\u9762\u5411\u5bf9\u8c61\u7684\u529f\u80fd\uff1f \uff081\uff09\u7ee7\u627f\u6027 typedef st … \u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-3228","post","type-post","status-publish","format-standard","hentry","category-jishu"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/3228","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/comments?post=3228"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/3228\/revisions"}],"predecessor-version":[{"id":3229,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/3228\/revisions\/3229"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/media?parent=3228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/categories?post=3228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/tags?post=3228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}