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Frequently Asked Questions

How do I format a block of C code?

VIM FAQs - WikiFAQ - Answers to Frequently Asked Questions (...
To format C code, use = instead of Q. Try :h C_indenting to get more information on controlling the way your code is formatted.
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Can I write C++ code into the textual block ?

P-GRADE 8 FAQ & Known bugs
Yes. If you configure P-GRADE to invoke an appropriate C++ compiler. (config files are located in the $GRADE_ROOT/config directory). I would like to get some input data from the user in my program but the standard scanf C function does not work. I would like to show some information in the application console window but the printf C function does not work. If the system is not in editor mode, the changes will be dropped automatically.
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How do I block you from crawling my code?

Google Code Search FAQ
Google Code Search respects robots.txt, so there are a couple ways you can block us from crawling your code: If you have access to the robots file for your web server, you can add the code's path to the Disallow: line. Learn more. Alternatively, you can simply put a robots file in the root directory of your code package. This will work for both archives and source control repositories like CVS and Subversion.
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Is C++ a superset of C? Can I use a C++ compiler to compile C code?

Infrequently Asked Questions in comp.lang.c
C++ is a superset of something, we're not sure what. You can use a C++ compiler to compile C code, but the results may surprise you.
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What's the best style for code layout in C?

Infrequently Asked Questions in comp.lang.c
There are many systems of indentation advocated, but all of them have the same basic flaw; they will mislead the reader when the actual code logic does not follow the indentation. It is better to avoid indentation entirely, so the reader will not be misled.
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Why does the census block where I live have a different ZCTA than my ZIP Code?

U.S. Census Bureau ZIP Code Tabulation Areas - FAQs
ZCTAs are approximations of mailing ZIP Codes and should not be confused with them. There are some common reasons why someone's ZIP Code may not match the ZCTA code: Your block may contain addresses with another ZIP Code, and the majority of addresses in the block have this other ZIP Code; Field operations may not have been able to identify a ZIP Code for all addresses in your block during the census.
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How should I format my code?

Core War Frequently Asked Questions (rec.games.corewar FAQ)
The way you format your code is really your own choice in the end. If you are new to the game then use the style you feel most comfortable with. However, using a common format helps others to understand your code quicker. Most players tend to use the following conventions when writing code:
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C. What is the format of a cancel message?

The Cancel FAQ
Here's an example, a spam cancel by Chris Lewis, that follows all of the standard conventions (plus a few extras), reformatted to fit into 80 columns): Date: 8 Jun 1997 15:43:37 GMT Path: vixen.cso.uiuc.edu!ais.net!newsfeed.direct.ca!News1.Vancouver.iSTAR.net! news.istar.net!n1van.istar!hammer.uoregon.edu!nrchh45.rich.nt.com!bcarh8ac. bnr.ca!despams.ocunix.on.ca!cyberspam!not-for-mail From: clewis@ferret.ocunix.on.ca (Chris Lewis) Approved: clewis@ferret.ocunix.on.
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c What is the estimated dry dock block load for a given block arrangement?

MLCPAC Naval Engineering (v) Division
Block loads depend on displacement and docking draft and trim. MLCP(vs-tech) can calculate loads and discuss the result with cutter and docking personnel if required. MLCPAC(vs-tech) can check the Section Modulus, alloys, and other properties to find readily available substitutions.
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How can I code in C++ if I do not know C?

Programming in C and C++: Frequently Asked Questions (FAQ)
The C programming language is a full subset of the C++ programming language. Though the programming paradigms are different for the languages (C advocates procedural programming paradigm while C++ advocates object-oriented programming paradigm), basic programming language constructs are similar.
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c. Can I block unwanted mail?

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Yes. If you decide you do not wish to receive further internal email from another user, you can put them on your "block" list. The directions can be accessed either from the mail itself or from the general inbox page. You can unblock a sender if you wish, and they will receive polite notification that mail has been blocked. If you receive email which you consider to be unwelcome, or even offensive or instrusive, please do contact us.
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What is a point code block?

SS7PCAdmin FAQ Page
A point code block contains four point codes, the smallest unit of issue. Even if you only have one switch, you will be issued four point codes. You may save the redundant codes for future use, as long as the additional switches are in the same state for which you applied for the original code. Conversely, you can also apply for as many point code blocks as is necessary to address all your signaling points (SPs).
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c) What is the format of Private Key?

Digital Signature India
Private Keys are not easily viewed simply because they need to remain secure. They exist for the most part in an encrypted state within the registry of the Operating System. However, if specified at the time of key pair generation, it is possible to export a Private Key as a data file for backup purposes. Like any cryptographic key, Private Keys are simply long, random numbers.
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How to format unsigneds in C?

FAQ on C/C++/Unix by Roseanne Zhang
Here is a bridf summary about types and their format Format Use with %c char (in character form) %d decimal signed int, short, char %u decimal unsigned int, unsigned short, unsigned char %x hexadecimal int, short, char %o octal int, short, char %ld decimal signed long %lu %lx %lo as above, but for longs //========= main() { unsigned long a,b,c; a=1; b=3; c=a+b; printf("a=%lu,b=%lu,c=%lu\n",a,b,c); } //output: a=1,b=3,c=4 //all correct!!! //=========
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How to format decimals in C?

FAQ on C/C++/Unix by Roseanne Zhang
This code will tell you! double x,y; x=123456.78978; y=x+20; printf("%f\n",y); // print all decimal to the precision printf("%.2f\n",y);// keep 2 decimal places
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How to use mixed c and c++ code?

FAQ on C/C++/Unix by Roseanne Zhang, Java Programmer Certifi...
Change the file extention to cpp first; compile it under g++ or other c++ compiler; fix all the possible compiling errors, mostly, type checking errors, since c++ check type more strictly. If you are lucky, maybe none. Dealing with individual c-functions, you can use the following compiling directives to make your header file be used by both c and c++. #ifdef __cplusplus extern "C" { #endif // list all your c functions here #ifdef __cplusplus } #endif You are in c++ now.
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Can I obtain a Class C address block?

The APNIC FAQ
No. IPv4 address ranges are no longer referred to in terms of classes (class A, class B, class C). Classful addressing methods, which waste address space, are now made redundant by Classless Inter Domain Routing (CIDR). In CIDR, address ranges are referred to by their prefix (or subnet mask) length. For example, APNIC's minimum allocation, /21 ("slash 21"), refers to 2048 addresses or the equivalent of 8 former class Cs.
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FAQs
Classful addressing (class A, class B, class C, etc) is now redundant and the RIPE NCC no longer uses that terminology. The original model for distributing IP addresses, based on classful addressing strategies, did not take into account the massive expansion of Internet use and was unable to scale to meet this expansion. Classless Inter Domain Routing (CIDR) is now one of the fundamental requirements for eligibility to receive IP address ranges.
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Do you have example code in both C# and VB.NET?

Mad! Widgets - FAQs
Client-side code pertaining to validators that are not â??visibleâ?? on the server is not sent to the browser.
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But surely C code is not very efficient ?

Numerix - SigLib FAQ
The SigLib routines have been coded with a great deal of thought going into their run-time efficiency. While we accept that there will always be routines that are more efficient to code at the assembly level, modern C compilers can produce very efficient assembly code. We follow a set of standard guide lines for coding our functions for optimum run-time efficiency and you can view them on-line. Yes, SigLib and MatLab use interchangable delimited ASCII data files formats.
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How do I include compiled C code?

R for Windows FAQ
We strongly encourage you to do this via building an R package: see the 'Writing R Extensions' manual. In any event you should install the parts of the R system for building R packages (in rw2000.exe), and get and install the tools (including Perl) and compilers mentioned in the file README.packages contained therein. Then you can use ...\bin\R CMD SHLIB foo.c bar.f If you want to use Visual C++, Borland C++ or other compilers, see the appropriate section in README.packages.
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Can your disassembler give me 'C' source code?

General FAQs
Sorry, Far too much information is lost in the source->binary compilation process to be able to reconstruct anything looking remotely like high-level
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What's the most popular Bar Code Format?

Ticketing Reservation System, Tour Reservation Software, Boa...
The most popular BarCode format is the UPC (Universal Product Code) Format, which we find in all supermarket products. Available since the early 1970's this format is known worldwide, and is universally recognized. For Automatic Identification Applications, however, BarCode CODE 39 Format is the de facto standard for Government, Manufacturing, BarCode Industry, Education, and Business applications.
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What's UPC Bar Code Format?

Ticketing Reservation System, Tour Reservation Software, Boa...
The UPC BarCode Format is the standard BarCode Format for items that are for sale to the public. Probably the largest user of the UPC code is your local supermarket. The UPC BarCode Format is used to encode a 12 digit number. The first number is the number system character, the next five are the manufacturer number, the next five are the product number, and the last digit is the checksum character.
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What is the format of the @tags? Where should I put them in source code?

jGuru: XDoclet FAQ Home Page
You put @tags in javadoc comments of the program elements (method, class, field, etc). It follows the basic rules of javadoc comments, and a set of x... All Linux Devices | AntiOnline | Apache Today | ASPNews | CPU Planet | DatabaseJournal | DBASupport.com | Enterprise IT Planet | HardwareCentral | ISP Glossary | ISP News | ISP Planet | Just Linux | Linux Planet | ServerCompare | ServerWatch | Solaris Guide | SQLCourse.com | SQLCourse2.
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What's CODE 39 Bar Code Format?

Ticketing Reservation System, Tour Reservation Software, Boa...
The CODE 39 BarCode Format (aka: 3 of 9) is the most commonly used BarCode Format because it enables numbers, upper case letters, and some punctuation marks (Capital Letters A-Z, Numbers 0-9, the "space" character, and the symbols:-,+,/,$,.,%) to be BarCoded. CODE 39 is a variable length format, allowing for encoding any number of digits. This format has become the standard for Government, Manufacturing, BarCode Industry, Education, and Business applications.
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What A/C Unit and A/C code should I use to code a payment voucher?

The Finance Office at the University of Bath
To check the validity of this Account Code, go to GL20. Enquire on the appropriate Accounting Unit then use the Accounts command button to show only the valid codes against that Accounting Unit. If the Account Code which is correct is not shown to be valid against your Accounting Unit, you will need to contact the Finance Office who can set up the Account Code for you. For enquiries about setting up Accounting Units and Account Codes contact extension 3238.
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