CS301 Final Term Slides Lectures 19-45

CS301-Data Structures · PPT Slide Merged By LGWT · Final Term Lecture 19 - 45 · You Can Discuss Your Problems in these groups: · Study Group · Community Link · oup%20Link · Paid Services Avaiable: · Assignments · Quiz · GDB · Mid & Final Exam Preparation · CLICK ME FOR PAID SERVICES

•  The answer is that, yes, we don’t want the function to change the parameter, but neither do we want to use up time and memory creating and storing an entire copy of it.
•  So, we make the original object available to the called function by using pass-by-reference.
•  We also mark it constant so that the function will not alter it, even by mistake.
•  Use 2: The const keyword appears at the end of class member’s function signature:

EType& findMin( ) const;

•  Such a function cannot change or write to member variables of that class.
•  This type of usage often appears in functions that are suppose to read and return member variables.