C2007-09-26
lseek() sample program in C
Input and output are normally sequential: each read or write takes place at a position in the file right after the previous one. When necessary, however, a file can be read or writ
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C2007-09-26
Open, Creat, Close, Unlink system calls sample program in C
Other than the default standard input, output and error, you must explicitly open files in order to read or write them. There are two system calls for this, open and creat [sic].
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UNIX read and write system calls sample program in C
Input and output uses the read and write system calls, which are accessed from C programs through two functions called read and write. For both, the first argument is a file descri
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malloc, calloc - Storage Management - in C
The functions malloc and calloc obtain blocks of memory dynamically.
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fgets(), fputs() - Line Input and Output - sample program in C
fgets reads the next input line (including the newline) from file fp into the character array line; at most maxline-1 characters will be read. The resulting line is terminated with
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Error Handling - Stderr and Exit - sample program in C
The treatment of errors in cat is not ideal. The trouble is that if one of the files can't be accessed for some reason, the diagnostic is printed at the end of the concatenated out
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C2007-09-26
File read and write - sample program in C
The objective of this tutorial to write a program that accesses a file that is not already connected to the program. One program that illustrates the need for such operations is ca
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scanf and sscanf sample program in C
scanf reads characters from the standard input, interprets them according to the specification in format, and stores the results through the remaining arguments. The format argumen
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Variable-length Argument Lists sample program in C
This tutorial contains an implementation of a minimal version of printf, to show how to write a function that processes a variable-length argument list in a portable way. Since we
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Using printf function in C
The output function printf translates internal values to characters. We have used printf informally in previous chapters. The description here covers most typical uses but is not c
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Standard Input and Output in C
The C library implements a simple model of text input and output. A text stream consists of a sequence of lines; each line ends with a newline character. If the system doesn't oper
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Using Bit-field in C
When storage space is at a premium, it may be necessary to pack several objects into a single machine word; one common use is a set of single-bit flags in applications like compile
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