Destructor

The purpose of a destroyer is to destroy objects created by a constructor. Like a constructor, the destructor is a member function with the same name as the class name but preceded by a tilde (~). This is a special member function of a class that is performed each time an object in its class leaves its field or when delete is applied to a pointer to the object in that class.

Example Program:

#include <iostream>
using namespace std;
class Line
{ 
 private:
 double length;
 public:
 void setLength( double len );
 double getLength( void );
 Line(); // constructor declaration
 ~Line(); // destructor declaration
};
Line::Line(void)
{
cout << "Object is being created" << endl;
}
Line::~Line(void)
{ 
cout << "Object is being deleted" << endl;
}
void Line::setLength( double len )
{ 
length = len;
}
double Line::getLength( void )
{
 return length;
}
// Main function for the program
int main( )
{
 Line line; 
 line.setLength(6.0); // set line length
 cout<<"Length of line : " ;
 cout<< line.getLength() <<endl;
 return 0;
}

Output: