The strlen function is used to determine the length of a string. The strcpy function is used to copy one string to another. The standard string.h library contains many useful functions to manipulate strings. Some of the most useful functions have been exampled here

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Some Common String Functions

The standard string.h library contains many useful functions to manipulate strings. Some of the most useful functions have been exampled here.

The strlen Function

The strlen function is used to determine the length of a string. Let us learn the use of strlen with example:

#include <stdio.h>
#include <string.h>
int main()
{
char name[80];
int length;

printf("Enter your name: ");
gets(name);

length = strlen(name);

printf("Your name has %d characters\n", length);
return 0;
}

And the execution of the program will be as follows:

Enter your name: Tarun Subhash Tyagi
Your name has 19 characters

Enter your name: Preeti Tarun
Your name has 12 characters

The strcpy Function

The strcpy function is used to copy one string to another. Let us learn the use of this function with example:

#include <stdio.h>
#include <string.h>

int main()
{
char first[80];
char second[80];

printf("Enter first string: ");
gets(first);

printf("Enter second string: ");
gets(second);

printf("first: %s, and second: %s Before strcpy()\n " , first, second);

strcpy(second, first);

printf("first: %s, and second: %s After strcpy()\n", first, second);
return 0;
}

and the output of the program will be as:

Enter first string: Tarun
Enter second string: Tyagi
first: Tarun, and second: Tyagi Before strcpy()
first: Tarun, and second: Tarun After strcpy()


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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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