以下程序的运行结果是()
#include<iostream>
using namespace std;
class example{
public:
example(int n){
i=n;
cout<<"Constructing\n";
}
~example(){
cout<<"Destructing\n";
}
int get_i(){
return i;
}
private:
inti;
};
int sqr_it(example o){
return o.get_i()*o.get_i();
}
int main(){
example x(10);
cout<<x.get_i()<<endl;
cout<<sqr_it(x)<<endl;
return 0;
} 
Constructing
10
Destructing
100
Destructing