Palindrome in C programming language as number and as string

What is palindrome?

Any word , phrase or sequence that reads the same backward and as forward .

Example ::  madam , 22 , 33 , nurse etc.

Program to check palindrome number in C.

#include <stdio.h>

void main ()

{

int n , opposite = 0 , temp ;

clrscr () ;

printf ("\n Enter a number:") :

scanf ("%d", & n) ;

temp = n ;

while ( temp != 0 )

{

opposite = opposite * 10 ;

opposite = opposite + temp%10 ;

temp = temp / 10 ;

}

if ( n == opposite )

printf ("\n Number is palindrome:") ;

else

printf ("\n Not a palindrome:") ;

getch () ;

} 

Palindrome of sting using string functions ::

#include<stdio.h>

#include<string.h>

void main ()

{

char x [50] , y[50] ;

printf ("\n Enter a string:") ;

gets (x) ;

strcpy ( y , x ) ;
strrev ( y ) ;
if ( strcmp ( x , y ) == 0 )
{
printf ("\n Enter string is palindrome:") ;
else
printf ("\n Not a palindrome:") ;
getch () ;
}

palindrome of string without string function ::

#include <stdio.h>

#include <string.h>

void main ()

{

char word [50] ;

int first , second , last, size = 0 ;

clrscr () ;

printf ("\n Enter a word:") ;

gets ( word ) ;

while ( word [ size ] ! = 0 ) 

size ++ ;

last = size - 1 ;

second = size / 2 ;

for ( first = 0 ; first < second : first++ )

{

if ( word [ first ] != word [ last ] ) 

{

printf ("\n Not a palindrome:") ;

break ;

}

last -- ;

}

if ( first == second )

printf ("\n palindrome:") ;

getch () ;

}