The strcmp function is used to compare two strings together. The strcat function is used to join one string to another. The variable name of an array points to the base address of that array. Therefore, if we try to compare two strings using the following, we would be comparing two addresses

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The strcmp Function

The strcmp function is used to compare two strings together. The variable name of an array points to the base address of that array. Therefore, if we try to compare two strings using the following, we would be comparing two addresses, which would obviously never be the same as it is not possible to store two values in the same location.

if (first == second) /* It can never be done to compare strings */

The following example uses the strcmp function to compare two strings:

#include <string.h>
int main()
{
char first[80], second[80];
int t;
for(t=1;t<=2;t++)
{
printf("\nEnter a string: ");
gets(first);

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

if (strcmp(first, second) == 0)
puts("The two strings are equal");

else
puts("The two strings are not equal");
}
return 0;
}

And the execution of the program will be as follows:

Enter a string: Tarun
Enter another string: tarun
The two strings are not equal

Enter a string: Tarun
Enter another string: Tarun
The two strings are equal

The strcat Function

The strcat function is used to join one string to another. Let us see how? With the help of example:

#include <string.h>
int main()
{
char first[80], second[80];

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

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

strcat(first, second);

printf("The two strings joined together: %s\n",
first);
return 0;
}

And the execution of the program will be as follows:

Enter a string: Data
Enter another string: Recovery
The two strings joined together: DataRecovery


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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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