移动构造函数 | 易学教程

online c++ compile

https://github.com/QuantStack/xeus-cling

#include <iostream>
using namespace std;
//IntNum getNum();

class IntNum{
public:
   IntNum(int x=0):xptr(new int(x)){
       cout<< "call default constructor ---"<<endl;
   }
   IntNum(const IntNum &n): xptr(new int(*n.xptr)){
       cout<< "call copy constuctor ----" <<endl;
   }
   IntNum(IntNum && n):xptr(n.xptr){
       n.xptr = nullptr;
       cout << "call move Constuctor ----"<<endl;
   }

private:
int * xptr;
};

IntNum getNum(){
IntNum intNum;
return intNum;
}

main(){
   getNum();
   getNum();
   getNum();
   getNum();
}

#include <iostream>
using namespace std;
//IntNum getNum();

IntNum getNum(){
   IntNum a;
       IntNum b;
   bool flag = true;
   if(flag == true)
       return a;
   else
       return b;

   // IntNum&& c = IntNum();
   // return c;
}

main(){
   getNum();
   // getNum();
   // getNum();
   // getNum();
}

执行结果

来源：CSDN

作者：fangyan_1229

链接：https://blog.csdn.net/fangyan_1229/article/details/103652835

标签

构造函数