| 1.Header file [#include<stdio.h> , conio.h , math.h , string.h] #incluide<stdio.h:-  This command is a preprocessor directive in c which contain all standard input and output files before compile any c program.2.Global variable 3.main() 4.{ 5.Local variable 6.Body/Statement 7.} |
Table of Contents
❶ Header file
This is a collection of files that contains many functions.
✪ Stdio.h
This also known as Standard input output header file.
It contain two function file
A. Printf()
B. Scanf()
❖What is input and output function:-
When we want to create a program then we need to a function that provides to inter the data into its environment after compulsion of this program we want to display their effect on the screen such as monitor.
✬For this work c compiler provides two types of function.
A. Printf():-
Printf() is used to display/print value of variable using standard output device
printf(“format specifier”,variable name);
EX:-Int a,b
printf( “%d%d”,a,b);
2. EX:- Name print:-
Printf(“message”);
Printf(“csestudy247.com);
B. Scanf():-
This is a library function which is used to enter data from standard input device.
scanf(“format specifier”,& variable name);
ex:-Int a,b
scanf(“%d%d”,&a,&b);
✪ conio.h
This also known as consol input output header file.
It contain Two function file
A. getch()
It is used to hold the output screen.
EX:-ATM Machine :-like 1st inset ATM card and select the language and enter the password here ATM screen hold whenever you can not press the cancel button.
2.Turbo c++ compiler like same as ATM Machine
B. Clrscr()
It is used to clean output screen.
EX:-Turbo c++
✪ Math.h
This also known as mathematical header file.
It contain many function file.
A. Pow()
B. sqrt()
C. asin()
D. acos()
E. log()
F. exp() etc
✪ String.h
This also known as string header file.
It contain many function.
A. strcpy()
B. Strlen()
C. Strchr()
D.Strlwr()
❷ Global variable
Such a variable in which is define outside the main() function is called as global variable.
❸main():-
This is a function at which any program is start to work and in other word any program has execute/Run main() function.
❹{
This is use to open the function.
❺Local variable:-
Such a variable which is define inside the main() function is known as local variable.
❻Statement/Body
All processing work is written in this part.
❼ }
This is used to close/end the function.