Difference between revisions of "GNU C Programming Notes"
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== So you want to program GNU C in Debian/Ubuntu/Mint ? == | == So you want to program GNU C in Debian/Ubuntu/Mint ? == | ||
Install the Development Libraries and Header Files which contains the symlinks, headers, and object files needed to compile and link programs which use the standard C library. | Install the Development Libraries and Header Files which contains the symlinks, headers, and object files needed to compile and link programs which use the standard C library. | ||
− | |||
sudo apt-get install libc6-dev | sudo apt-get install libc6-dev | ||
+ | |||
+ | Without them you will get: fatal error: stdio.h: No such file or directory when the compile is seeking stdio.h | ||
+ | |||
+ | The libraries of “stdio” stands for “standard input/output, the most basic libraries for getting the input from the keyboard and output result text to the display or whatever. | ||
== getchar() and loop control == | == getchar() and loop control == |
Revision as of 18:09, 12 January 2020
Text Notes Document for Gnu C Programming
Contents
So you want to program GNU C in Debian/Ubuntu/Mint ?
Install the Development Libraries and Header Files which contains the symlinks, headers, and object files needed to compile and link programs which use the standard C library.
sudo apt-get install libc6-dev
Without them you will get: fatal error: stdio.h: No such file or directory when the compile is seeking stdio.h
The libraries of “stdio” stands for “standard input/output, the most basic libraries for getting the input from the keyboard and output result text to the display or whatever.
getchar() and loop control
C program that needs to attend the user input without blocking a loop depends on which environment you're coding: raw-C for the glass-tty, curses/termcap, X, KDE, Gnome, etc.
the ncurses function halfdelay()
getchar() example
#include <stdio.h> #define EOL 10 #define ESC 27 main() { char c = 'X'; while (c != ESC) { int cnt; cnt++; printf("iteration of test %d", cnt); c = getchar(); } return 0; }
getputchar() example
#include <stdio.h> main() { int c; c=getchar(); /*declare c to getchar() for character inputs*/ while(c != EOF){ putchar(c); c=getchar(); } }
==
References
- Introduction to ANSI C (on linux)