Write a program to show a use case of explicit type conversion.
#include<iostream>
using namespace std;
class A
{
private:
int num;
public:
A():num(0)
{
cout << "default constructor" << endl;
}
~A()
{
cout << "destructor" << endl;
}
explicit A(int x):num(x)
{
cout << "parameterized constructor" << endl;
}
void print()
{
cout << "num = " << num << endl;
}
};
int main()
{
A ob1,ob2(37),ob3;
A ob4;
//A ob5 = 87;//invalid
//ob3 = 85;//invalid
ob1.print();
ob2.print();
ob3.print();
ob4.print();
return 0;
}
Output
default constructor parameterized constructor default constructor default constructor num = 0 num = 37 num = 0 num = 0 destructor destructor destructor destructor