Constructor Part-1

#include<iostream.h>
class Bulb
{
private:
int w;
public:
void askinfo()
{
int x;
cout<<"Enter wattage";
cin>>x;
if(x>=0&&x<=24)
{
w=x;
}
else
{
x=0;
}
}
void printinfo()
{
cout<<"Wattage is:"<<w<<endl;
}
};
void main()
{
Bulb k;
k.printinfo();
}
--------------------------------------------------------------------

#include<iostream.h>
class Bulb
{
int w=0;    //Class level
public:
void askinfo()
{


cout<<"Enter wattage";
cin>>w;
}
void printinfo()
{
cout<<"Wattage is:"<<w<<endl;
}
};
void main()
{
Bulb g,t;
g.printinfo();
t.printinfo();
Bulb k;
k.printinfo();
}
-----------------------------------------------------------------------

#include<iostream.h>
class Bulb
{
int w;
public:
void initialize()
{
w=0;
}
void askinfo()
{


cout<<"Enter wattage";
cin>>w;
}
void printinfo()
{
cout<<"Wattage is:"<<w<<endl;
}
};
void main()
{
Bulb g,t;
g.printinfo();
t.printinfo();
Bulb k;
k.printinfo();
}
-----------------------------------------------------------------------

#include<iostream.h>
class Bulb
{
int w;
public:
Bulb()
{
w=0;
}


void askinfo()
{


cout<<"Enter wattage";
cin>>w;
}
void printinfo()
{
cout<<"Wattage is:"<<w<<endl;
}
};
void main()
{
Bulb g,t;
g.printinfo();
t.printinfo();
Bulb k;
k.printinfo();
}
---------------------------------------------------------

#include<iostream.h>
class Bulb
{
int w;
public:
Bulb()
{
w=0;
}
Bulb(int e)
{
if(e>=0&&e<=240)
{
w=e;
}
else
{
w=0;
}
}


void askinfo()
{


cout<<"Enter wattage";
cin>>w;
}
void printinfo()
{
cout<<"Wattage is:"<<w<<endl;
}
};
void main()
{
Bulb g(60);
g.printinfo();


Bulb k;
k.printinfo();
}


Note:- Practice all and try to understand the output.
------------------ Continue >>>Part-2----