--------------- tire.m-------------------
- (id) initWithPressure : (float)p
{
if(self = [self initWithPressure:p treadDepth:20.0])
{
}
return (self);
}
-(id) initWithTreadDepth : (float)td
{
if(self = [self initWithPressure:34.0 threadDepth:td])
{
}
return (self);
}
-(id) initWithPressure:(float)p threadDepth:(float)td
{
if(self = [super init])
{
pressure = p;
treadDepth = td;
}
return (self);
}
------------------------- subClassing --------------------------------
-(id)initWithPressure:(float)p threadDepth:(float)td
{
if(self = [super initWithPressure:p treadDepth:td])
{
rainHandling = 23.7;
snowHandling = 43.5;
}
return (self);
}
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