CO2402 Advanced Programming with C++ Lecture 3-4 Notes
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Course
Advanced Programming with C++ (CO2402)
Institution
University Of Central Lancashire Preston (UClan)
This document contains detailed lecture notes from Lectures 3 and 4 of the CO2402 course on Advanced Programming with C++. It covers critical aspects of memory management and pointers, including the basics of memory units, the importance of memory in programming, and the use of pointers for efficie...
University of Central Lancashire Preston (UClan)
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Advanced Programming with C++ (CO2402)
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CO2402: Advanced Programming
with C++ Lecture 3
Memory and Pointers
1. Basics of Memory
o Bit: The smallest unit of data in a computer, representing a
binary state (0 or 1).
o Byte: Consists of 8 bits.
o Word: The standard data size for a given architecture,
typically 16, 32, or 64 bits.
Understanding memory units is crucial as they define how data is
stored and manipulated in a computer.
2. Why is Memory Important?
o Knowing the size of data types is essential for operations like
sorting, efficient memory usage, and optimizing performance,
especially in memory-constrained environments like embedded
systems.
Example: The sizeof() operator returns the size of a data type in
bytes, which is vital for functions like qsort() that require
knowledge of the size of elements.
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