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PRE PROCESSOR DIRECTIVES in –C LANGUAGE. 2401 – Course
PRE PROCESSOR DIRECTIVES IN –C LANGUAGE. 2401 – Course Notes. 1 The C preprocessor is a macro processor that is used automatically by the C compiler to transform programmer defined programs before actual compilation takes place. It is called a macro processor because it allows the user to define macros, which are short abbreviations for longer constructs. This functionality allows for some very useful and practical tools to design our programs. To include header files(Header files are files with pre defined function definitions, user defined data types, declarations that can be included.) To include macro expansions. We can take random fragments of C code and abbreviate them into smaller definitions namely macros, and once they are defined and included via header files or directly onto the program itself it(the user defined definition) can be used everywhere in the program. In other words it works like a blank tile in the game scrabble, where if one player possesses a blank tile and uses it to state a particular letter for a given word he chose to play then that blank piece is used as that letter throughout the game. It is pretty similar to that rule. Special pre processing directives can be used to, include or exclude parts of the program according to various conditions. To sum up, preprocessing directives occurs before program compilation. So, it can be also be referred to as pre compiled fragments of code. Some possible actions are the inclusions of other files in the file being compiled, definitions of symbolic constants and macros and conditional compilation of program code and conditional execution of preprocessor directives. -
C and C++ Preprocessor Directives #Include #Define Macros Inline
MODULE 10 PREPROCESSOR DIRECTIVES My Training Period: hours Abilities ▪ Able to understand and use #include. ▪ Able to understand and use #define. ▪ Able to understand and use macros and inline functions. ▪ Able to understand and use the conditional compilation – #if, #endif, #ifdef, #else, #ifndef and #undef. ▪ Able to understand and use #error, #pragma, # and ## operators and #line. ▪ Able to display error messages during conditional compilation. ▪ Able to understand and use assertions. 10.1 Introduction - For C/C++ preprocessor, preprocessing occurs before a program is compiled. A complete process involved during the preprocessing, compiling and linking can be read in Module W. - Some possible actions are: ▪ Inclusion of other files in the file being compiled. ▪ Definition of symbolic constants and macros. ▪ Conditional compilation of program code or code segment. ▪ Conditional execution of preprocessor directives. - All preprocessor directives begin with #, and only white space characters may appear before a preprocessor directive on a line. 10.2 The #include Preprocessor Directive - The #include directive causes copy of a specified file to be included in place of the directive. The two forms of the #include directive are: //searches for header files and replaces this directive //with the entire contents of the header file here #include <header_file> - Or #include "header_file" e.g. #include <stdio.h> #include "myheader.h" - If the file name is enclosed in double quotes, the preprocessor searches in the same directory (local) as the source file being compiled for the file to be included, if not found then looks in the subdirectory associated with standard header files as specified using angle bracket. - This method is normally used to include user or programmer-defined header files. -
Section “Common Predefined Macros” in the C Preprocessor
The C Preprocessor For gcc version 12.0.0 (pre-release) (GCC) Richard M. Stallman, Zachary Weinberg Copyright c 1987-2021 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation. A copy of the license is included in the section entitled \GNU Free Documentation License". This manual contains no Invariant Sections. The Front-Cover Texts are (a) (see below), and the Back-Cover Texts are (b) (see below). (a) The FSF's Front-Cover Text is: A GNU Manual (b) The FSF's Back-Cover Text is: You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development. i Table of Contents 1 Overview :::::::::::::::::::::::::::::::::::::::: 1 1.1 Character sets:::::::::::::::::::::::::::::::::::::::::::::::::: 1 1.2 Initial processing ::::::::::::::::::::::::::::::::::::::::::::::: 2 1.3 Tokenization ::::::::::::::::::::::::::::::::::::::::::::::::::: 4 1.4 The preprocessing language :::::::::::::::::::::::::::::::::::: 6 2 Header Files::::::::::::::::::::::::::::::::::::: 7 2.1 Include Syntax ::::::::::::::::::::::::::::::::::::::::::::::::: 7 2.2 Include Operation :::::::::::::::::::::::::::::::::::::::::::::: 8 2.3 Search Path :::::::::::::::::::::::::::::::::::::::::::::::::::: 9 2.4 Once-Only Headers::::::::::::::::::::::::::::::::::::::::::::: 9 2.5 Alternatives to Wrapper #ifndef :::::::::::::::::::::::::::::: -
Capital Compounders How to Beat the Market and Make Money Investing in Growth Stocks Revised & Expanded Second Edition
Capital Compounders How to Beat the Market and Make Money Investing in Growth Stocks Revised & Expanded Second Edition Robin R. Speziale National Bestselling Author, Market Masters [email protected] | RobinSpeziale.com Copyright © 2018 Robin R. Speziale All Rights Reserved. ISBN: 978-1-7202-1080-1 DISCLAIMER Robin Speziale is not a register investment advisor, broker, or dealer. Readers are advised that the content herein should only be used solely for informational purposes. The information in “Capital Compounders” is not investment advice or a recommendation or solicitation to buy or sell any securities. Robin Speziale does not propose to tell or suggest which investment securities readers should buy or sell. Readers are solely responsible for their own investment decisions. Investing involves risk, including loss of principal. Consult a registered professional. CONTENTS START HERE vi INTRODUCTION 1 1 How I Built a $300,000+ Stock Portfolio Before 9 30 (And How You Can Too!) My 8-Step Wealth Building Journey 2 Growth Investing vs. Value Investing 21 3 My 72 Rules for Investing in Stocks 28 4 Capital Compounders (Part 1/2) 77 5 Next Capital Compounders (Part 2/2) 88 6 Think Short: Becoming a Smarter Investor 96 7 Small Companies; Big Dreams 106 8 How to Find Tenbaggers 123 9 How I Manage My Stock Portfolio and Generate 131 Outsized Returns – The Three Bucket Model 10 How This Hedge Fund Manager Achieved a 141 24% Compound Annual Return (Since 1998!) 11 100+ Baggers – Top 30 Super Stocks 145 12 Small Cap Ideas – Tech Investor Interview -
GPU Directives
OPENACC® DIRECTIVES FOR ACCELERATORS NVIDIA GPUs Reaching Broader Set of Developers 1,000,000’s CAE CFD Finance Rendering Universities Data Analytics Supercomputing Centers Life Sciences 100,000’s Oil & Gas Defense Weather Research Climate Early Adopters Plasma Physics 2004 Present Time 2 3 Ways to Accelerate Applications with GPUs Applications Programming Libraries Directives Languages “Drop-in” Quickly Accelerate Maximum Acceleration Existing Applications Performance 3 Directives: Add A Few Lines of Code OpenMP OpenACC CPU CPU GPU main() { main() { double pi = 0.0; long i; double pi = 0.0; long i; #pragma acc parallel #pragma omp parallel for reduction(+:pi) for (i=0; i<N; i++) for (i=0; i<N; i++) { { double t = (double)((i+0.05)/N); double t = (double)((i+0.05)/N); pi += 4.0/(1.0+t*t); pi += 4.0/(1.0+t*t); } } printf(“pi = %f\n”, pi/N); printf(“pi = %f\n”, pi/N); } } OpenACC: Open Programming Standard for Parallel Computing “ OpenACC will enable programmers to easily develop portable applications that maximize the performance and power efficiency benefits of the hybrid CPU/GPU architecture of Titan. ” Buddy Bland Titan Project Director Easy, Fast, Portable Oak Ridge National Lab “ OpenACC is a technically impressive initiative brought together by members of the OpenMP Working Group on Accelerators, as well as many others. We look forward to releasing a version of this proposal in the next release of OpenMP. ” Michael Wong CEO, OpenMP http://www.openacc-standard.org/ Directives Board OpenACC Compiler directives to specify parallel regions -
Advanced Perl
Advanced Perl Boston University Information Services & Technology Course Coordinator: Timothy Kohl Last Modified: 05/12/15 Outline • more on functions • references and anonymous variables • local vs. global variables • packages • modules • objects 1 Functions Functions are defined as follows: sub f{ # do something } and invoked within a script by &f(parameter list) or f(parameter list) parameters passed to a function arrive in the array @_ sub print_sum{ my ($a,$b)=@_; my $sum; $sum=$a+$b; print "The sum is $sum\n"; } And so, in the invocation $a = $_[0] = 2 print_sum(2,3); $b = $_[1] = 3 2 The directive my indicates that the variable is lexically scoped. That is, it is defined only for the duration of the given code block between { and } which is usually the body of the function anyway. * When this is done, one is assured that the variables so defined are local to the given function. We'll discuss the difference between local and global variables later. * with some exceptions which we'll discuss To return a value from a function, you can either use an explicit return statement or simply put the value to be returned as the last line of the function. Typically though, it’s better to use the return statement. Ex: sub sum{ my ($a,$b)=@_; my $sum; $sum=$a+$b; return $sum; } $s=sum(2,3); One can also return an array or associative array from a function. 3 References and Anonymous Variables In languages like C one has the notion of a pointer to a given data type, which can be used later on to read and manipulate the contents of the variable pointed to by the pointer. -
Perl
-I<directory> directories specified by –I are Perl prepended to @INC -I<oct_name> enable automatic line-end processing Ming- Hwa Wang, Ph.D. -(m|M)[- executes use <module> before COEN 388 Principles of Computer- Aided Engineering Design ]<module>[=arg{,arg}] executing your script Department of Computer Engineering -n causes Perl to assume a loop around Santa Clara University -p your script -P causes your script through the C Scripting Languages preprocessor before compilation interpreter vs. compiler -s enable switch parsing efficiency concerns -S makes Perl use the PATH environment strong typed vs. type-less variable to search for the script Perl: Practical Extraction and Report Language -T forces taint checks to be turned on so pattern matching capability you can test them -u causes Perl to dump core after Resources compiling your script Unix Perl manpages -U allow Perl to do unsafe operations Usenet newsgroups: comp.lang.perl -v print version Perl homepage: http://www.perl/com/perl/, http://www.perl.org -V print Perl configuration and @INC Download: http://www.perl.com/CPAN/ values -V:<name> print the value of the named To Run Perl Script configuration value run as command: perl –e ‘print “Hello, world!\n”;’ -w print warning for unused variable, run as scripts (with chmod +x): perl <script> using variable without setting the #!/usr/local/bin/perl –w value, undefined functions, references use strict; to undefined filehandle, write to print “Hello, world!\n”; filehandle which is read-only, using a exit 0; non-number as it were a number, or switches subroutine recurse too deep, etc. -
Cornell Alumni News
VOL. XX., No. 11 [PRICE TEN CENTS] DECEMBER 6, 1917 Hundreds of Applicants for the Officers' Training Camps List of Faculty Members in the National Service An Undergraduate Demand for Higher Scholarship Standards Two More Cornell Men Receive the War Cross Pennsylvania 37, Cornell 0 ITHACA, NEW YORK CORNELL ALUMNI NEWS The Farmers' Loan and Herbert G. Ogden Jas. H. Oliphant & Co. E. E., '97 Trust Company ALFRED L. NORRIS, FLOYD W. MUNDY '98 Attorney and Counsellor at Law J. NORRIS OLIPHANT Όl 16, 18, 20, 22 William St., New York Patents and Patent Causes J. J, BRYANT, jr., '98, FRANK L. VAN WIE Branch, 475 Fifth Ave. 120 Broadway New York Members New York Stock Exchange T Λxrτϊr»xr ί 16 Pal1 Mal1 East» S W 1 and Chicago Stock Exchange LONDON \ 26 Old Broad Street, E. C. 2 PARIS 41 Boulevard Haussman Going to Ithaca? New York Office, 61 Broadway Chicago Office,711 The Rookery LETTERS OF CREDIT Use the "Short Line" FOREIGN EXCHANGES between CABLE TRANSFERS Auburn (Monroe St.) and Ithaca Cascadilla School The Leading Better Quicker Cheaper Direct connections at Auburn with Preparatory School for Cornell New York Central Trains for Syra- Located at the edge of the University Do You Use cuse, Albany and Boston. campus. Exceptional advantages for college entrance work. Congenial living. Press Clippings? Athletic training. Certificate privilege. For information and catalogue address: It will more than pay you to secure our extensive service cover- W. D. Funkhouser, Principal ing all subjects, trade and personal Ithaca, N. Y. and get the benefit of the best and Trustees most systematic reading of all papers and periodicals, here and Franklin C. -
Python Guide Documentation 0.0.1
Python Guide Documentation 0.0.1 Kenneth Reitz 2015 09 13 Contents 1 Getting Started 3 1.1 Picking an Interpreter..........................................3 1.2 Installing Python on Mac OS X.....................................5 1.3 Installing Python on Windows......................................6 1.4 Installing Python on Linux........................................7 2 Writing Great Code 9 2.1 Structuring Your Project.........................................9 2.2 Code Style................................................ 15 2.3 Reading Great Code........................................... 24 2.4 Documentation.............................................. 24 2.5 Testing Your Code............................................ 26 2.6 Common Gotchas............................................ 30 2.7 Choosing a License............................................ 33 3 Scenario Guide 35 3.1 Network Applications.......................................... 35 3.2 Web Applications............................................ 36 3.3 HTML Scraping............................................. 41 3.4 Command Line Applications....................................... 42 3.5 GUI Applications............................................. 43 3.6 Databases................................................. 45 3.7 Networking................................................ 45 3.8 Systems Administration......................................... 46 3.9 Continuous Integration.......................................... 49 3.10 Speed.................................................. -
C Programming Tutorial
C Programming Tutorial C PROGRAMMING TUTORIAL Simply Easy Learning by tutorialspoint.com tutorialspoint.com i COPYRIGHT & DISCLAIMER NOTICE All the content and graphics on this tutorial are the property of tutorialspoint.com. Any content from tutorialspoint.com or this tutorial may not be redistributed or reproduced in any way, shape, or form without the written permission of tutorialspoint.com. Failure to do so is a violation of copyright laws. This tutorial may contain inaccuracies or errors and tutorialspoint provides no guarantee regarding the accuracy of the site or its contents including this tutorial. If you discover that the tutorialspoint.com site or this tutorial content contains some errors, please contact us at [email protected] ii Table of Contents C Language Overview .............................................................. 1 Facts about C ............................................................................................... 1 Why to use C ? ............................................................................................. 2 C Programs .................................................................................................. 2 C Environment Setup ............................................................... 3 Text Editor ................................................................................................... 3 The C Compiler ............................................................................................ 3 Installation on Unix/Linux ............................................................................ -
Assembly Language Programming
Experiment 3 Assembly Language Programming Every computer, no matter how simple or complex, has a microprocessor that manages the computer's arithmetical, logical and control activities. A computer program is a collection of numbers stored in memory in the form of ones and zeros. CPU reads these numbers one at a time, decodes them and perform the required action. We term these numbers as machine language. Although machine language instructions make perfect sense to computer but humans cannot comprehend them. A long time ago, someone came up with the idea that computer programs could be written using words instead of numbers and a new language of mnemonics was de- veloped and named as assembly language. An assembly language is a low-level programming language and there is a very strong (generally one-to-one) correspondence between the language and the architecture's machine code instructions. We know that computer cannot interpret assembly language instructions. A program should be developed that performs the task of translating the assembly language instructions to ma- chine language. A computer program that translates the source code written with mnemonics into the executable machine language instructions is called an assembler. The input of an assembler is a source code and its output is an executable object code. Assembly language programs are not portable because assembly language instructions are specific to a particular computer architecture. Similarly, a different assembler is required to make an object code for each platform. The ARM Architecture The ARM is a Reduced Instruction Set Computer(RISC) with a relatively simple implementation of a load/store architecture, i.e. -
Introduction to GPU Programming with CUDA and Openacc
Introduction to GPU Programming with CUDA and OpenACC Alabama Supercomputer Center 1 Alabama Research and Education Network Contents Topics § Why GPU chips and CUDA? § GPU chip architecture overview § CUDA programming § Queue system commands § Other GPU programming options § OpenACC programming § Comparing GPUs to other processors 2 What is a GPU chip? GPU § A Graphic Processing Unit (GPU) chips is an adaptation of the technology in a video rendering chip to be used as a math coprocessor. § The earliest graphic cards simply mapped memory bytes to screen pixels – i.e. the Apple ][ in 1980. § The next generation of graphics cards (1990s) had 2D rendering capabilities for rendering lines and shaded areas. § Graphics cards started accelerating 3D rendering with standards like OpenGL and DirectX in the early 2000s. § The most recent graphics cards have programmable processors, so that game physics can be offloaded from the main processor to the GPU. § A series of GPU chips sometimes called GPGPU (General Purpose GPU) have double precision capability so that they can be used as math coprocessors. 3 Why GPUs? GPU Comparison of peak theoretical GFLOPs and memory bandwidth for NVIDIA GPUs and Intel CPUs over the past few years. Graphs from the NVIDIA CUDA C Programming Guide 4.0. 4 CUDA Programming Language CUDA The GPU chips are massive multithreaded, manycore SIMD processors. SIMD stands for Single Instruction Multiple Data. Previously chips were programmed using standard graphics APIs (DirectX, OpenGL). CUDA, an extension of C, is the most popular GPU programming language. CUDA can also be called from a C++ program. The CUDA standard has no FORTRAN support, but Portland Group sells a third party CUDA FORTRAN.