07-Managing Input and Output Operations.pdf

1. B.Bhuvaneswaran, AP (SG) / CSE
9791519152
bhuvaneswaran@rajalakshmi.edu.in
Programming Logic
Managing I/P
and O/P
Operations

2. Managing Input and Output Operations
Managing Input and Output Operations Rajalakshmi Engineering College 2
Rajalakshmi Engineering College 2
Introduction
 The important aspect of C programming language is its ability to
handle input and output.
 Even though C does not have the language construct for I/O
operations, a set of functions designed to provide a standard I/O
system for C programs has been defined such as printf(), scanf(),
puthchar() and getchar() functions.

3. Managing Input and Output Operations
Managing Input and Output Operations Rajalakshmi Engineering College 3
Rajalakshmi Engineering College 3
Introduction
 A program using these functions must include the standard
header file stdio.h in it, using the directive statement at the
beginning as:
#include <stdio.h>
 The filename stdio.h is an abbreviation for "standard input-output
header file".
 The instruction #include <stdio.h> tells the compiler to search for
a file named stdio.h and place its contents at this point in the
program.
 The contents of the header file become part of the source code
when it is compiled.

4. Managing Input and Output Operations
Managing Input and Output Operations Rajalakshmi Engineering College 4
Rajalakshmi Engineering College 4
Types of Input / Output Functions
 Unformatted I/O functions
 Formatted I/O functions
I/O Functions
Unformatted
I/O Functions
Formatted
I/O Functions

5. Managing Input and Output Operations
Managing Input and Output Operations Rajalakshmi Engineering College 5
Rajalakshmi Engineering College 5
Unformatted I/O Functions
Unformatted
I/O Functions
Unformatted
Input Functions
getchar() getch() getche() gets()
Unformatted
Output Functions
putchar() putch() puts()

6. Managing Input and Output Operations
Managing Input and Output Operations Rajalakshmi Engineering College 6
Rajalakshmi Engineering College 6
Formatted I/O Functions
Formatted
I/O Functions
Formatted
Input
Functions
scanf() fscanf()
Formatted
Output
Functions
printf() fprintf()

7. Managing Input and Output Operations
Managing Input and Output Operations Rajalakshmi Engineering College 7
Rajalakshmi Engineering College 7
Input / Output Devices
 Standard input device  Keyboard
 Standard output device  Screen (Monitor / VDU)

8. Thank You