Getting Started With C programming language
The C programming language is a programming languages first created between 1969 and 1973 by Dennis Ritchie and has been the basis of many other programming languages since.
The first thing you need to get started with C is to find a compiler for your program. As C is a compiled language it needs to be turned into binary format before being run so the computer can understand and complete the commands.
There are a few available including Code:Blocks with MinGW for windows, gcc for Linux and XCode for Mac OS x.
Beginning with C
Every C program must be included inside a main function called “main”. This function is a collection of commands that perform specific requests and is called automatically when a program first executes.
Other functions can be included inside this function and there is actually a standard functions file that comes with your chosen compiler.
To include the standard C functions you will need to include this file using the “include” directive. This is done using #include plus the file name, which in C’s case is called stdio.h.
A very basic C program is shown below:
printf( “Hello World!n” );
Let’s break down our program then shall we. The #include command above tells our compiler to grab all the code from the stdio.h file and in effect paste it in place meaning we have access to everything contained inside it. In our example above this gives us access to the printf() and getchar() functions.
Our int main() function tells the compiler that there is a function called main and that the function will return an integer value which is why we place int before the function call. The curly braces that follow tells our compiler when our function will begin and end.
Our printf() function is the standard way of printing information to the screen and the getchar() function allows user to input a single character.
To end our little program we then return the value 0 which indicates that our program run successfully.
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