\u9762\u5411\u5bf9\u8c61\u7684\u4e09\u5927\u7279\u6027\u662f\u4ec0\u4e48<\/p>\n
\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u4e09\u5927\u57fa\u672c\u7279\u6027\u662f\u5c01\u88c5\u3001\u7ee7\u627f\u548c\u591a\u6001\u3002\u8fd9\u4e9b\u7279\u6027\u662f\u9762\u5411\u5bf9\u8c61\u8bbe\u8ba1\u7684\u6838\u5fc3，\u5b83\u4eec\u5171\u540c\u652f\u6491\u4e86\u73b0\u4ee3\u8f6f\u4ef6\u5f00\u53d1\u4e2d\u7684\u8bb8\u591a\u8bbe\u8ba1\u6a21\u5f0f\u548c\u67b6\u6784\u539f\u5219\u3002<\/p>\n
\u9996\u5148\u662f\u5c01\u88c5，\u5b83\u7684\u6838\u5fc3\u601d\u60f3\u662f\u5c06\u6570\u636e\u548c\u64cd\u4f5c\u6570\u636e\u7684\u65b9\u6cd5\u7ed1\u5b9a\u5728\u4e00\u8d77，\u5f62\u6210\u4e00\u4e2a\u6709\u673a\u6574\u4f53，\u540c\u65f6\u5bf9\u5916\u90e8\u9690\u85cf\u5b9e\u73b0\u7ec6\u8282\u3002\u5728C++\u4e2d，\u6211\u4eec\u901a\u8fc7\u7c7b\u6765\u5b9e\u73b0\u5c01\u88c5，\u4f7f\u7528\u8bbf\u95ee\u4fee\u9970\u7b26（private\u3001protected\u3001public）\u6765\u63a7\u5236\u6210\u5458\u7684\u53ef\u89c1\u6027\u3002\u5c01\u88c5\u7684\u597d\u5904\u662f\u63d0\u9ad8\u4ee3\u7801\u7684\u5b89\u5168\u6027\u548c\u53ef\u7ef4\u62a4\u6027，\u56e0\u4e3a\u5b83\u9650\u5236\u4e86\u5916\u90e8\u4ee3\u7801\u5bf9\u5bf9\u8c61\u5185\u90e8\u72b6\u6001\u7684\u76f4\u63a5\u8bbf\u95ee，\u53ea\u80fd\u901a\u8fc7\u5b9a\u4e49\u597d\u7684\u63a5\u53e3\u8fdb\u884c\u4ea4\u4e92\u3002<\/p>\n
class BankAccount {
\nprivate:
\n double balance; \/\/ \u79c1\u6709\u6570\u636e\u6210\u5458<\/p>\n
public:
\n void deposit(double amount) {
\n if (amount > 0) {
\n balance += amount;
\n }
\n }<\/p>\n
bool withdraw(double amount) {
\n if (amount > 0 && balance >= amount) {
\n balance -= amount;
\n return true;
\n }
\n return false;
\n }<\/p>\n
double getBalance() const {
\n return balance;
\n }
\n};<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d，\u4f59\u989d（balance）\u662f\u79c1\u6709\u7684，\u5916\u90e8\u4ee3\u7801\u4e0d\u80fd\u76f4\u63a5\u4fee\u6539\u5b83，\u5fc5\u987b\u901a\u8fc7\u5b58\u6b3e（deposit）\u548c\u53d6\u6b3e（withdraw）\u65b9\u6cd5，\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u5305\u542b\u4e1a\u52a1\u903b\u8f91\u548c\u9a8c\u8bc1\u3002<\/p>\n
\u7b2c\u4e8c\u4e2a\u7279\u6027\u662f\u7ee7\u627f，\u5b83\u5141\u8bb8\u6211\u4eec\u57fa\u4e8e\u5df2\u6709\u7684\u7c7b\u521b\u5efa\u65b0\u7c7b，\u65b0\u7c7b\u53ef\u4ee5\u7ee7\u627f\u539f\u6709\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u7ee7\u627f\u5efa\u7acb\u4e86\u7c7b\u4e4b\u95f4\u7684\u5c42\u6b21\u5173\u7cfb，\u652f\u6301\u4ee3\u7801\u91cd\u7528\u548c"\u662f\u4e00\u79cd"\u7684\u5173\u7cfb\u5efa\u6a21\u3002\u5728C++\u4e2d，\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528public\u3001protected\u6216private\u7ee7\u627f，\u6700\u5e38\u89c1\u7684\u662fpublic\u7ee7\u627f\u3002<\/p>\n
class Animal {
\nprotected:
\n std::string name;<\/p>\n
public:
\n Animal(const std::string& n) : name(n) {}
\n virtual void makeSound() const {
\n std::cout << "Some generic sound" << std::endl;
\n }
\n};<\/p>\n
class Dog : public Animal {
\npublic:
\n Dog(const std::string& n) : Animal(n) {}
\n void makeSound() const override {
\n std::cout << name << " says: Woof!" << std::endl;
\n }
\n};<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d，Dog\u7c7b\u7ee7\u627f\u4e86Animal\u7c7b，\u590d\u7528\u4e86\u5b83\u7684name\u5c5e\u6027\u548c\u6784\u9020\u51fd\u6570\u903b\u8f91，\u540c\u65f6\u53ef\u4ee5\u91cd\u5199makeSound\u65b9\u6cd5\u6765\u63d0\u4f9b\u7279\u5b9a\u7684\u884c\u4e3a\u3002<\/p>\n
\u7b2c\u4e09\u4e2a\u7279\u6027\u662f\u591a\u6001，\u5b83\u5141\u8bb8\u6211\u4eec\u4ee5\u7edf\u4e00\u7684\u65b9\u5f0f\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\u3002\u591a\u6001\u5206\u4e3a\u7f16\u8bd1\u65f6\u591a\u6001（\u901a\u8fc7\u51fd\u6570\u91cd\u8f7d\u548c\u8fd0\u7b97\u7b26\u91cd\u8f7d\u5b9e\u73b0）\u548c\u8fd0\u884c\u65f6\u591a\u6001（\u901a\u8fc7\u865a\u51fd\u6570\u548c\u7ee7\u627f\u5b9e\u73b0）\u3002\u8fd0\u884c\u65f6\u591a\u6001\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u6700\u5f3a\u5927\u7684\u7279\u6027\u4e4b\u4e00，\u5b83\u4f7f\u5f97\u4ee3\u7801\u53ef\u4ee5\u5904\u7406\u57fa\u7c7b\u6307\u9488\u6216\u5f15\u7528\u6240\u6307\u5411\u7684\u4efb\u4f55\u6d3e\u751f\u7c7b\u5bf9\u8c61\u3002<\/p>\n
void makeAnimalSound(const Animal& animal) {
\n animal.makeSound(); \/\/ \u8c03\u7528\u7684\u662f\u5b9e\u9645\u5bf9\u8c61\u7c7b\u578b\u7684makeSound\u65b9\u6cd5
\n}<\/p>\n
int main() {
\n Dog dog("Rex");
\n Animal animal("Generic");<\/p>\n
makeAnimalSound(dog); \/\/ \u8f93\u51fa: Rex says: Woof!
\n makeAnimalSound(animal); \/\/ \u8f93\u51fa: Some generic sound
\n}<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d，makeAnimalSound\u51fd\u6570\u63a5\u53d7\u4e00\u4e2aAnimal\u5f15\u7528，\u4f46\u5f53\u6211\u4eec\u4f20\u5165Dog\u5bf9\u8c61\u65f6，\u5b83\u8c03\u7528\u7684\u662fDog\u7684makeSound\u65b9\u6cd5，\u8fd9\u5c31\u662f\u8fd0\u884c\u65f6\u591a\u6001\u7684\u4f53\u73b0\u3002<\/p>\n
\u8fd9\u4e09\u5927\u7279\u6027\u76f8\u4e92\u914d\u5408，\u4f7f\u5f97\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u80fd\u591f\u521b\u5efa\u66f4\u6a21\u5757\u5316\u3001\u66f4\u7075\u6d3b\u3001\u66f4\u6613\u4e8e\u7ef4\u62a4\u7684\u4ee3\u7801\u3002\u5728\u5b9e\u9645\u9879\u76ee\u4e2d，\u6211\u7ecf\u5e38\u4f7f\u7528\u8fd9\u4e9b\u7279\u6027\u6765\u8bbe\u8ba1\u6e05\u6670\u7684\u7c7b\u5c42\u6b21\u7ed3\u6784，\u5b9e\u73b0\u4ee3\u7801\u590d\u7528，\u5e76\u4f7f\u7cfb\u7edf\u66f4\u5bb9\u6613\u6269\u5c55\u548c\u4fee\u6539\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb242\u6b21\uff0c\u70b9\u8d5e3\u6b21\uff0c\u6536\u85cf3\u6b21\u3002\u6458\u8981\uff1a\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u4e09\u5927\u57fa\u672c\u7279\u6027\u5305\u62ec\u5c01\u88c5\u3001\u7ee7\u627f\u548c\u591a\u6001\u3002\u5c01\u88c5\u901a\u8fc7\u8bbf\u95ee\u63a7\u5236\u9690\u85cf\u5b9e\u73b0\u7ec6\u8282\uff1b\u7ee7\u627f\u5b9e\u73b0\u4ee3\u7801\u590d\u7528\u548c\u7c7b\u5c42\u6b21\u5173\u7cfb\uff1b\u591a\u6001\u652f\u6301\u7edf\u4e00\u63a5\u53e3\u5904\u7406\u4e0d\u540c\u5bf9\u8c61\u7c7b\u578b\u3002\u8fd9\u4e9b\u7279\u6027\u5171\u540c\u6784\u5efa\u4e86\u6a21\u5757\u5316\u3001\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801\u7ed3\u6784\uff0c\u662f\u73b0\u4ee3\u8f6f\u4ef6\u5f00\u53d1\u7684\u6838\u5fc3\u57fa\u7840\u3002\u5728C++\u4e2d\uff0c\u901a\u8fc7\u7c7b\u3001\u8bbf\u95ee\u4fee\u9970\u7b26\u3001\u7ee7\u627f\u673a\u5236\u548c\u865a\u51fd\u6570\u7b49\u8bed\u8a00\u7279\u6027\u5b9e\u73b0\u4e86\u8fd9\u4e9b\u9762\u5411\u5bf9\u8c61\u539f\u5219\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99,190,5329],"topic":[],"class_list":["post-52899","post","type-post","status-publish","format-standard","hentry","category-server","tag-java","tag-190","tag-5329"],"yoast_head":"\n