design pattern : adding new function to pre-written class in library
I have a library provided by the vendor. All i have is header files and library files.
Library contains the class
Q : Now i want to add some function “
Library contains the class
Shape and there is whole hierarchy tree (i mean classes which derive from this base class).Q : Now i want to add some function “
getArea” (not originally present in the class or any of its derived class) in the class “Shape” , i don't have the source code.
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Short answer: do not do that.
If possible, use a freestanding function. Or use wrapper to extend Shape class.
Alternatively get library source, modify it and recompile.
If possible, use a freestanding function. Or use wrapper to extend Shape class.
Alternatively get library source, modify it and recompile.
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