C program main() declares the start of the function, while the two curly brackets show the start and finish of the function. Curly brackets in C are used to group statements together as in a function, or in the body of a loop. Such a grouping is known as a compound statement or a block

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Every C program contains a function called main. This is the start point of the program. Every function should return a value. In this program the function main returns no return value therefore we have written void main. We could also write this program as:

/* First Program to learn C */

#include <stdio.h>

main()
{

printf("This is a C program\n"); // printing a message

return 0;
}

Both the program are same and perform the same task. The result of both the program will print the following output on the screen:

This is a C program

#include<stdio.h> allows the program to interact with the screen, keyboard and file system of your computer. You will find it at the beginning of almost every C program.

main() declares the start of the function, while the two curly brackets show the start and finish of the function. Curly brackets in C are used to group statements together as in a function, or in the body of a loop. Such a grouping is known as a compound statement or a block.

printf("This is a C program\n"); prints the words on the screen. The text to be printed is enclosed in double quotes. The \n at the end of the text tells the program to print a new line as part of the output. printf() function is used for monitor display of the output.

Most of the C programs are in lower case letters. You will usually find upper case letters used in preprocessor definitions which will be discussed later, or inside quotes as parts of character strings.

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Data Recovery Book
 
Chapter 1 An Overview of Data Recovery
Chapter 2 Introduction of Hard Disks
Chapter 3 Logical Approach to Disks and OS
Chapter 4 Number Systems
Chapter 5 Introduction of C Programming
Chapter 6 Introduction to Computer Basics
Chapter 7 Necessary DOS Commands
Chapter 8 Disk-BIOS Functions and Interrupts Handling With C
Chapter 9 Handling Large Hard Disks
Chapter 10 Data Recovery From Corrupted Floppy
Chapter 11 Making Backups
Chapter 12 Reading and Modifying MBR with Programming
Chapter 13 Reading and Modifying DBR with Programming
Chapter 14 Programming for “Raw File” Recovery
Chapter 15 Programming for Data Wipers
Chapter 16 Developing more Utilities for Disks
Appendix Glossary of Data Recovery Terms
 
 
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