A default constructor does not have any parameter, but if you need, a constructor can have parameters. This helps you to assign initial value to an object at the time of its creationSyntax:
A(int a) //parameterized constructor
using namespace std;
void setLength( double len );
double getLength( void );
Line(double len); // This is the constructor
// Member functions definitions including constructor
Line::Line( double len)
cout << "object is being created, length = " << len << endl;
length = len;
void line::setlength( double len )
length = len;
double line::getlength( void )
// main function for the program
int main( )
// get initially set length.
cout << "length of line : " << line.getlength() <
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