Yahoo Web Search

Search results

1. Top results related to what is %m in c language?

   • What is stdin in C language?

     Top Answer

     Answered Jun 09, 2016 · 7 votes

     No, stdin is not "a memory address".

     It's an I/O stream, basically an operating-system level abstraction that allows data to be read (or written, in the case of stdout).

     You need to use the proper stream-oriented I/O functions to read from the stream.

     Of course you can read from RAM too, so it's best to write your own function to require a function that reads a character, then you can adapt that function to either read from RAM or from stdin.

     Something like:

     int my_scanf(int (*getchar_callback)(void *state), void *state, const char *fmt, ...);-

     Is usually reasonable. The state pointer is some user-defined state that is required by the getchar_callback() function, and passed to it by my_scanf().

     Check all answers on Stack Overflow

     1/5

   • what is (*this) in c language?

     Top Answer

     Answered Oct 04, 2015 · 4 votes

     In C, this is a normal parameter name, no different from any other name.

     You're probably using a C++ compiler, where this is a keyword and will give an error when used as a parameter.

     Check all answers on Stack Overflow

     2/5

   • what is far function pointer in c language and what is syntax of it?

     Top Answer

     Answered Nov 07, 2014 · 2 votes

     It was used in dos era and very machine specific (memory model). To keep the C independent of specific architecture, C never accepted far keyword in standard language still it is available as extensions with some compilers.

     Check all answers on Stack Overflow

     3/5

   • What exactly is \r in C language?

     Top Answer

     Answered Mar 10, 2012 · 13 votes

     It's Carriage Return. Source: http://msdn.microsoft.com/en-us/library/6aw8xdf2(v=vs.80).aspx

     The following repeats the loop until the user has pressed the Return key.

     while(ch!='\r'){ ch=getche();}

     Other Answers

     Answered Mar 10, 2012 · 19 votes

     '\r' is the carriage return character. The main times it would be useful are:

     • ["When reading text in binary mode, or which may come from a foreign OS, you'll find (and probably want to discard) it due to CR/LF line-endings from Windows-format text files.",""]
     • ["When writing to an interactive terminal on stdout or stderr , '\\r' can be used to move the cursor back to the beginning of the line, to overwrite it with new contents. This makes a nice primitive progress indicator.",""]

     The example code in your post is definitely a wrong way to use '\r'. It assumes a carriage return will precede the newline character at the end of a line entered, which is non-portable and only true on Windows. Instead the code should look for '\n' (newline), and discard any carriage return it finds before the newline. Or, it could use text mode and have the C library handle the translation (but text mode is ugly and probably should not be used).

     Other Answers

     Answered Mar 10, 2012 · 12 votes

     Once upon a time, people had terminals like typewriters (with only upper-case letters, but that's another story). Search for 'Teletype', and how do you think tty got used for 'terminal device'?

     Those devices had two separate motions. The carriage return moved the print head back to the start of the line without scrolling the paper; the line feed character moved the paper up a line without moving the print head back to the beginning of the line. So, on those devices, you needed two control characters to get the print head back to the start of the next line: a carriage return and a line feed. Because this was mechanical, it took time, so you had to pause for long enough before sending more characters to the terminal after sending the CR and LF characters. One use for CR without LF was to do 'bold' by overstriking the characters on the line. You'd write the line out once, then use CR to start over and print twice over the characters that needed to be bold. You could also, of course, type X's over stuff that you wanted partially hidden, or create very dense ASCII art pictures with judicious overstriking.

     On Unix, all the logic for this stuff was hidden in a terminal driver. You could use the stty command and the underlying functions (in those days, ioctl() calls; they were sanitized into the termios interface by POSIX.1 in 1988) to tweak all sorts of ways that the terminal behaved.

     Eventually, you got 'glass terminals' where the speeds were greater and and there were new idiosyncrasies to deal with - Hazeltine glitches and so on and so forth. These got enshrined in the termcap and later terminfo libraries, and then further encapsulated behind the curses library.

     However, some other (non-Unix) systems did not hide things as well, and you had to deal with CRLF in your text files - and no, this is not just Windows and DOS that were in the 'CRLF' camp.

     Anyway, on some systems, the C library has to deal with text files that contain CRLF line endings and presents those to you as if there were only a newline at the end of the line. However, if you choose to treat the text file as a binary file, you will see the CR characters as well as the LF.

     Systems like the old Mac OS (version 9 or earlier) used just CR (aka \r) for the line ending. Systems like DOS and Windows (and, I believe, many of the DEC systems such as VMS and RSTS) used CRLF for the line ending. Many of the Internet standards (such as mail) mandate CRLF line endings. And Unix has always used just LF (aka NL or newline, hence \n) for its line endings. And most people, most of the time, manage to ignore CR.

     Your code is rather funky in looking for \r. On a system compliant with the C standard, you won't see the CR unless the file is opened in binary mode; the CRLF or CR will be mapped to NL by the C runtime library.

     Check all answers on Stack Overflow

     4/5

   • What is exactly a stream in C language?

     Top Answer

     Answered Jun 08, 2020 · 2 votes

     A stream is an abstraction of an I/O channel. It can map to a physical device such as a terminal or tape drive or a printer, or it can map to a file in a file system, or a network socket, or something else completely. How that mapping is accomplished is not exposed to you, the programmer.

     From the perspective of your code, a stream is simply a source (input stream) or sink (output stream) of characters (text stream) or bytes (binary stream). Streams are managed through FILE objects and the stdio routines.

     As far as your code is concerned, all streams behave the same way, regardless of what they are mapped to. It's a uniform interface to operations that can have wildly different implementations.

     Check all answers on Stack Overflow

     5/5

   Show moreShow less

2. www.geeksforgeeks.org › format-specifiers-in-cFormat Specifiers in C - GeeksforGeeks

   www.geeksforgeeks.org › format-specifiers-in-c

   • Cached

   Oct 6, 2023 · 1. Character Format Specifier – %c in C. The %c is the format specifier for the char data type in C language. It can be used for both formatted input and formatted output in C language. Syntax: scanf("%d...", ...); printf("%d...", ...); Example: C. #include <stdio.h> int main() { char c; scanf("Enter some character: %c", &c);

3. stackoverflow.com › questions › 20577557c - What's the meaning of the %m formatting specifier ...

   stackoverflow.com › questions › 20577557

   • Cached

   Nov 4, 2020 · The ‘%m’ conversion is a GNU C Library extension. So: printf("%m ", d); is equivalent to. printf("%s ", strerror (errno), d); which is equivalent to. printf("%s ", strerror (errno)); Note that %mdoes not require an argument.

   Usage example

   printf("%s\n", strerror (errno));

   See more on stackoverflow

4. People also ask

   What is %C in C language?

   • The %c is the format specifier for the char data type in C language. It can be used for both formatted input and formatted output in C language. scanf("%d...", ...); printf("%d...", ...); Example: Input: Output: 2. Integer Format Specifier (signed) – %d in C

   Format Specifiers in C - GeeksforGeeks

   www.geeksforgeeks.org/format-specifiers-in-c/

   See all results for this question

   What format specifiers are used in C?

   • The C language provides a number of format specifiers that are associated with the different data types such as %d for int, %c for char, etc. In this article, we will discuss some commonly used format specifiers and how to use them. The below table contains the most commonly used format specifiers in C For character type. For signed integer type.

   Format Specifiers in C - GeeksforGeeks

   www.geeksforgeeks.org/format-specifiers-in-c/

   See all results for this question

   How many arithmetic operators are there in C language?

   • The arithmetic operators are used to perform arithmetic/mathematical operations on operands. There are 9 arithmetic operators in C language: Adds two numeric values. Subtracts right operand from left operand. Multiply two numeric values. Divide two numeric values. Returns the remainder after diving the left operand with the right operand.

   Operators in C - GeeksforGeeks

   www.geeksforgeeks.org/operators-in-c/

   See all results for this question

   Does %m require an argument?

   • Note that %m does not require an argument. Here printf("%m\ ", d) and printf("%s\ ", strerror (errno), d) have more arguments than required: with printf if there are extra trailing arguments, they are just evaluated and ignored. I think the most interesting part is the fact that printf does not require an extra parameter for each %m.

   c - What's the meaning of the %m formatting specifier? - Stack Overflow

   stackoverflow.com/questions/20577557/whats-the-meaning-of-the-m-formatting-specifier

   See all results for this question

5. www.programiz.com › c-programming › c-operatorsOperators in C - Programiz

   www.programiz.com › c-programming › c-operators

   • Cached

   • Arithmetic Operators. // Working of arithmetic operators #include int main() { int a = 9,b = 4, c; c = a+b; printf("a+b = %d \ ",c); c = a-b; printf("a-b = %d \ ",c); c = a*b; printf("a*b = %d \ ",c); c = a/b; printf("a/b = %d \ ",c); c = a%b; printf("Remainder when a divided by b = %d \ ",c); return 0; }
   • Increment and Decrement Operators. // Working of increment and decrement operators #include int main() { int a = 10, b = 100; float c = 10.5, d = 100.5; printf("++a = %d \ ", ++a); printf("--b = %d \ ", --b); printf("++c = %f \ ", ++c); printf("--d = %f \ ", --d); return 0; }
   • Assignment Operators. // Working of assignment operators #include int main() { int a = 5, c; c = a; // c is 5 printf("c = %d\ ", c); c += a; // c is 10 printf("c = %d\ ", c); c -= a; // c is 5 printf("c = %d\ ", c); c *= a; // c is 25 printf("c = %d\ ", c); c /= a; // c is 5 printf("c = %d\ ", c); c %= a; // c = 0 printf("c = %d\ ", c); return 0; }
   • Relational Operators. // Working of relational operators #include int main() { int a = 5, b = 5, c = 10; printf("%d == %d is %d \ ", a, b, a == b); printf("%d == %d is %d \ ", a, c, a == c); printf("%d > %d is %d \ ", a, b, a > b); printf("%d > %d is %d \ ", a, c, a > c); printf("%d < %d is %d \ ", a, b, a < b); printf("%d < %d is %d \ ", a, c, a < c); printf("%d != %

6. en.wikipedia.org › wiki › Operators_in_C_and_C++Operators in C and C++ - Wikipedia

   en.wikipedia.org › wiki › Operators_in_C_and_C++

   • Cached

   C++ also contains the type conversion operators const_cast, static_cast, dynamic_cast, and reinterpret_cast. The formatting of these operators means that their precedence level is unimportant. Most of the operators available in C and C++ are also available in other C-family languages such as C#, D, Java, Perl, and PHP with the same precedence ...

7. www.w3schools.com › c › c_operatorsC Operators - W3Schools

   www.w3schools.com › c › c_operators

   • Cached

   Comparison operators are used to compare two values (or variables). This is important in programming, because it helps us to find answers and make decisions. The return value of a comparison is either 1 or 0, which means true ( 1) or false ( 0 ). These values are known as Boolean values, and you will learn more about them in the Booleans and If ...