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Question #350 Difficulty:
According to the C++17 standard, what is the output of this program?
#include<iostream>
#include<functional>
class Q{
int v=0;
public:
Q(Q&&){
std::cout << "M";
}
Q(const Q&){
std::cout << "C";
}
Q(){
std::cout << "D";
}
void change(){
++v;
}
void func(){
std::cout << v;
}
};
void takeQfunc(std::function<void(Q)> qfunc){
Q q;
q.func();
qfunc(q);
q.func();
}
int main(){
takeQfunc([](Q&& q){
q.change();
});
return 0;
}
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