Question

What should be added to the class A for the program to compile successfully?

#include 
class A
{
public:
    A(const int num):_num(num){}
private:
    int _num; 
};
int main(void)
{
    A a;
    return 0;
}

Cosmo · Accepted Answer

Default constructor should be added to the class as it will not be created because parameterized constructor is already defined.

Cosmo · Accepted Answer

Default constructor

Cosmo · Answer

Class destructor

Cosmo · Answer

Copy constructor

Cosmo · Answer

Nothing, since default constructor is automatically added to the class

Cosmo · Answer

Nothing, since destructor is automatically added to the class