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有如下程序: include using namespace std; class Demo

有如下程序: #include<iostream> using namespace std; class Demo { public: Demo(){ cout<<"default constructor\n";} Demo(const Demo & x){ cout<<"copy constructor\n":} }; Demo userCode(Demo b){DemoC(b);return c;} int main() { Demo a,d; cout<<"calling userCode()\n"; d=userCode(a); return 0; } 执行上面程序的过程中,构造函数Demo()和Demo(const Demo &x)被调用的次数分别是

A.1和1

B.1和2

C.2和3

D.2和4


参考答案

更多 “ 有如下程序: include using namespace std; class Demo 有如下程序: #include<iostream> using namespace std; class Demo { public: Demo(){ cout<<"default constructor\n";} Demo(const Demo x){ cout<<"copy constructor\n":} }; Demo userCode(Demo b){DemoC(b);return c;} int main() { Demo a,d; cout<<"calling userCode()\n"; d=userCode(a); return 0; } 执行上面程序的过程中,构造函数Demo()和Demo(const Demo x)被调用的次数分别是A.1和1B.1和2C.2和3D.2和4 ” 相关考题
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