问题描述:
为类A增加复制构造函数,用下面的main函数测试
int main() { A a("good morning, code monkeys!"); a.output(); A b(a); b.output(); return 0; }
代码:
#include<iostream> #include<cstring> using namespace std; class A { private: char *a; public: A(char *aa) { a = new char[strlen(aa)+1]; //(a)这样处理的意义在于:______________________________ strcpy(a, aa); //(b)数据成员a与形式参数aa的关系:___________________________________ } A(A &aa) { this->a=new char[strlen(aa.a)+1]; strcpy(this->a,aa.a); } ~A() { delete []a; //(c)这样处理的意义在于: ___________________________________________ } void output() { cout<<a<<endl; } }; int main(){ A a("good morning, code monkeys!"); a.output(); A b(a); b.output(); return 0; }
运行结果: