BASIC C program

hello guys , today we are gonna start with our 1st program in C language....we are gonna learn this program in small small parts cause this is your base for the future program so everything should be crystal clear.

soo here's our first program

#include <stdio.h>
#include <conio.h>
void main()
{ clrscr();
printf("hello world");
}

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note: C and C++ is the case sensitive language

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output:

hello world

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to view output screen in turbo IDE we need to press alt+F5

turbo c contain 2 screen blue screen which is code window and other is black screen which is known as console window or output window

in programming language #  symbol is know as "poul".Actually unlike any other language in C  and C++ our program is first processed by an special software know as pre-processor after that compiler compiles our program.

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source code -> pre-processor -> compiler

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 so now the question is ....what is this pre-processor ???????

so by the word pre-processor we can understand that it is something that  starts / perform's its task before any process.IN our program there are some lines with .h extension for example #include<stdio.h> , these file are known as header files . BASICALLY  C IDE  provides us some preloaded functions or programs using which we can simplify our programs for example clrscr(); is an pre-defined function which comes under conio.h header file

pre-processor replace our header line with pre-defined functions that comes under that header file.we can see that if we compile our program then compiler will show around 400-500 lines compiled but our code is only of 7 lines therefore pre-processor replace lines which start with # with the functions which comes under that header file.so compiler does not deals with header line or the lines containing #include cause pre-processor replace these file with pre-defines functions.

thats all for today , we will discuss about each header files in my next post ....

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thank u!!!!