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printf is a C function belonging to the ANSI C standard library, and included in the file stdio.h.Its purpose is to print formatted text to the standard output stream.Hence the "f" in the name stands for "formatted".
GUIs created with scripting tools like Zenity and KDialog by KDE project [10] make use of stdin, stdout, and stderr, and are based on simple scripts rather than a complete GUI programmed and compiled in C/C++ using Qt, GTK, or other equivalent proprietary widget framework.
The C programming language provides many standard library functions for file input and output.These functions make up the bulk of the C standard library header <stdio.h>. [1] The functionality descends from a "portable I/O package" written by Mike Lesk at Bell Labs in the early 1970s, [2] and officially became part of the Unix operating system in Version 7.
printf is a C standard library function that formats text and writes it to standard output. The name, printf is short for print formatted where print refers to output to a printer although the functions are not limited to printer output. The standard library provides many other similar functions that form a family of printf-like functions.
The assert macro implements runtime assertion. If the expression within it is false, the macro will print a message to stderr and call abort(), defined in stdlib.h.The message includes the source filename and the source line number from the macros __FILE__ and __LINE__, respectively. [2]
By default, when csh runs a command, the command inherits the csh's stdio file handles for stdin, stdout and stderr, which normally all point to the console window where the C shell is running. The i/o redirection operators allow the command to use a file instead for input or output.
From January 2008 to April 2010, if you bought shares in companies when Thomas M. Ryan joined the board, and sold them when he left, you would have a -56.6 percent return on your investment, compared to a -19.7 percent return from the S&P 500.
Similarly, both the stdout and stderr output streams can be redirected to standard output and the program.lint using stream redirection: lint program.c 2 > & 1 | tee program.lint To view and append the output from a command to an existing file: