Learn C Programming in 7 Days only

Learn C Programming in 7 Days only

Lets Start......

First we have to know what is C??

Ans: C is a programming language developed by  Dennis Ritchie between 1969 & 1973 at AT&T Bell Laboratory.

• It is structured programming language.
• It allow recursion and lexical variable scope.
• It is portable language i.e. It available on all platform like Mac,Windows, Unix.
• User-defined types are allowed in C by a typedef function.
• There is small fixed number of keywords i.e. if,else, while, do etc.
• There are large number of arithmetic and logical operators.

Now we make a first hello world application.

1. Open Turbo C. (Download it from here work on WIN7 & WIN8)
2. Open a new file.
3. Now write:

#include <stdio.h>
#include <conio.h>

void main()
{
printf("Hello World.");
getch();
}

 

Now run the program....
Let us explain....

#include -> This will include the support file like stdio.h, conio.h, math.h

stdio.h -> This provide the common function like printf, scanf etc.

conio.h -> This provide the common function like clrscr, getch etc.

void -> This is a type which return/give null(empty) value.

main() -> This is a function. When program run this function first called by the compiler.

 

Note: On defining the function means when creating a function it must have a type.

Example: void main, int main, char hello, void hi

 

And the default structure is as follow:

--------------------------------------------------

int void()

{

//functions goes here

}

-------------------------------------------------

void hello()

{

}

--------------------------------------------------

 

printf() -> It is a function which write on the console.

Example:

printf("This is a test"):

printf("How are you");

 

 

getch() -> It wait for a key. if it exclude from the program then after writing the output it disappear.