PPT-CMPT 225 Memory and C++ Pointers

Outline C objects and memory C primitive types and memory Note primitive types int long float double char January 2010 Greg Mori 2 Dynamic Memory Example from cmpt2252stack Java. MPI and C-Language Seminars 2010. Seminar . Plan (1/3). Aim:. Introduce the ‘C’ Programming Language.. Plan to cover:. Basic C, and programming techniques needed for HPC coursework.. C-bindings for the Message Passing Interface (MPI).. Introduction to Operating Systems. . Introduction to Deadlocks. Acknowledgement: some slides are taken from Anthony D. Joseph’s course material at UC Berkeley . and Dr. Janice Reagan’s course material at SFU. We’ll talk about today. Pointers. Arrays. Strings. Classes. “new” operator. Pointers. Stores the memory address where the data is stored. int. * . numberPointer. ;. Can access the data that is pointed to with *. Pointers and Memory. References vs. Pointers, . Addresses, Pointer Arithmetic, . Pointers & Arrays, Stack & Heap memory. Learning & Development Team. http://academy.telerik.com. . Telerik Software Academy. CSE 2451. Rong. Shi. Language comparison. C has pointers. Java has references. C++ has pointers . and . references. Pointers. Values of variables are stored in memory, at a particular location. A location is identified and referenced with an address. COP3275 – Programming using c. Diego J. Rivera-Gutierrez. Administrative stuff. Reminder: No class on Friday. . Celebrate the US Independence. Dress in Stripes and stars.... Yell “ ‘. merica. ” at everyone and have fun, but be safe. . Memory Management. Memory management. Arrays. Dynamic memory. Dynamic arrays and pointers. Building a vector class. Memory Management. Memory Requirements. code storage. data storage. Memory Management. Overview. What is a pointer. Why do I care?. What can be 'pointed to'?. Example. What is a pointer. A pointer is essentially an address. It tells your. code "manipulate whatever is 'here'". Why do I care?. Copies from SEE C++ programming course and from . Starting . Out with C++: Early Objects, . 8/E . by Tony . Gaddis, . Judy Walters and Godfrey . Muganda. Simple Pointer Operations. int. main(). {. pointer. : memory address of a piece of data. Why pointers?. Address can be used to access/modify the data from any function. Pass a pointer to the data instead of a whole copy of . the data. Pointers required for file I/O. . Operating Systems. Processes. Multiprogramming. When multiple programs share the same processor . An example of . pseudoparallelism. Processes share processor (each get a short turn) so that in a perceptible length of time it appears processes run in parallel . Required. : . PM. : . Ch. 6.5, . pgs. 73-75. Arrays. . Pointer . Basics. . Pointer . Tutorial (. Chps. 1-4. ). Recommended. : . K&R, . Chapter 5. BYU CS 224. Pointers and Arrays. 2. Define wild pointers. See how wild pointers caus. e problems. Sometimes you’re lucky; other times, you’re not…. Review the steps for avoiding wild pointers. Wild pointers. Uninitialized local or member variables can cause problems. Terminos. . españoles. de . ingeneria. de . computacion. .. Nuestros. . Objetivos. Traer . galletas. . para. los . estudiantes. Enseñar. los . estudiantes. . español. Confundir. los . estudiantes.