C++聚合（HAS-A关系） C++聚合|C++

在C ++中, 聚合是一个过程, 其中一个类将另一类定义为任何实体引用。这是重用类的另一种方法。它是代表HAS-A关系的一种关联形式。
C ++聚合示例【C++聚合（HAS-A关系）】让我们看一个聚合示例, 其中Employee类将Address类的引用作为数据成员。这样, 它可以重用Address类的成员。

#include < iostream> using namespace std; class Address { public: string addressLine, city, state; Address(string addressLine, string city, string state) { this-> addressLine = addressLine; this-> city = city; this-> state = state; } }; class Employee { private: Address* address; //Employee HAS-A Address public: int id; string name; Employee(int id, string name, Address* address) { this-> id = id; this-> name = name; this-> address = address; } void display() { cout< < id < < " "< < name< < " "< < address-> addressLine< < " "< < address-> city< < " "< < address-> state< < endl; } }; int main(void) { Address a1= Address("C-146, Sec-15", "Noida", "UP"); Employee e1 = Employee(101, "Nakul", & a1); e1.display(); return 0; }

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