overload or inherit

[epanda]

Hi,

I would like to merge two class which have got 90% of same source
code. But I don't know what to do.

class A {

int putLightOn () {

switch(status)
{
case iAmOff :
print "I am off" ;
print "put me on!!!\n" ;
}
}

}


class B {

int putLightOn () {

switch(status)
{
case iAmOff :
print "I am off" ;
print "and I am a red light" ; <<<< the only difference
between A and B
print "put me on!!!\n" ;
}
}

}


I would like that B inherit from A but I don't know how re writing B's
putLightOn function

Can you help me?
Thanks

 

[epanda]

Ok thanks Kevin.

Kevin Frey a écrit :

 

[James Kanze]

I would like to merge two class which have got 90% of same
source code. But I don't know what to do.

class A {
int putLightOn () {
switch(status)
{
case iAmOff :
print "I am off" ;
print "put me on!!!\n" ;
}
}
}

class B {
int putLightOn () {
switch(status)
{
case iAmOff :
print "I am off" ;
print "and I am a red light" ; <<<< the only difference
between A and B
print "put me on!!!\n" ;
}
}
}

I would like that B inherit from A but I don't know how re
writing B's putLightOn function

As Kevin said, it largely depends on whether you want the two
classes to behave polymorphically nor not. If so, look into the
Template Method pattern or the Strategy pattern. If not,
consider using variations on mixins.