Vector Implementation Basics

• CMPT 225
• Fall 2021
• Lecture 4

Example Using a Simple “Vector” Class

Take a look at the simple_vector.cpp file.

Name	Type	Value
y	float	(empty)
x	int	5
…	…	…
p	int *	address
g	int *	p+1

What is *g?

Implementation in IVector.h

See IVector.h

Templates

• Often, we have algorithms that will work on many data types, with few or no changes.
• In strongly typed languages, we need a way to produce “generic” code–code that can work on different types in different places.
• In C++, templates let us write generic code.
• A template function or class defineition has a placeholder for one or more data types that is instanciated at compile time.
• The instanciation may be different at different places in the same code.

Test Program

See test_program.cpp

See simple_vector2.cpp

TVector is a templated version of IVector

See TVector.h

See Vector.h

See TestVector.cpp