The C Programming Language

The C Programming Language by Kernighan and Ritchie is awesome book to start C programming.

Table of Content

Chapter	Title	Link
Chapter-01	A tutorial Introduction	Link
Chapter-02	Types, Operators and Expression	Link
Chapter-03	Control Flow	Link
Chapter-04	Function and Program Structure	Link
Chapter-05	Pointers and Array	Link
Chapter-06	Structures	Link
Chapter-07	Input and Output	Link
Chapter-08	The UNIX System Interface	Link
Appendix A.	Reference Manual	Link
Appendix B.	Standard Library	Link
Appendix C.	Symmary of Change	Link

Installing the required tools

Install vcpkg on Windows, Linux, and macOS has a very descriptive for evely flavour of operaing system. But for linux follow the command

ubuntu@ip:~$ sudo apt-get update

ubuntu@ip:~$ sudo apt-get install build-essential tar curl zip unzip

ubuntu@ip:~$ git clone https://github.com/microsoft/vcpkg

ubuntu@ip:~$ cd vcpkg

ubuntu@ip:~$ ./bootstrap-vcpkg.sh

Running a C file using command line

If the file name is HelloWorld.c the the command is :-

ubuntu@ip:~$ cc HelloWorld.c && ./a.out

Commenting in C Programme

#include <stdio.h>
/* Some comments*/
int main(){
    printf("");
}

C Data Types

Data Type	Description
int	int means the variable are listed as Integer
float	fload means the variable are listed as Floating Point value
char	char means the variable are listed as character -- a single byte
short	short means the variable are listed as short integer
long	long means the variable are listed as long integer
double	double means the variable are listed as double-precision floating point

The size of these objects are machine dependent, but in general 16-bit ints lies between -32768 and +32767. A float number is typically a 32-bit quantity, with at least six signigicant digits and magintude between 10^-38 and 10^38.

Precision in C Programme

Precision	Description
%d	print as decimal integer
%6d	print as decimal integer, at least 6 character wide
%f	print as floating point
%6f	print as floating point, at least 6 character wide
%.2	print as floating point, 2 character after decimal point
%6.2	print as floating point, at least 6 wide and 2 after decimal point

Symbolic Constant

Syntax :-

#define name replacement text

Example :-

#include <stdio.h>

#define LOWER 5

int main(){
    printf("%d\n", LOWER);
}

Error Received While Playing in C Programme

Error	Cause of Error
error: expected ‘;’ before ‘}’ token	Semi-Colon is missing somewhere in programme.
error: expected ‘)’ before ‘;’ token	Parentheses is missing. It can happen when opening parentheses is missing also.