WAP to check a string is palindrome or not

eg.

MADAM is palindrome
MAIDEN is not a palindrome.

#include<iostream.h>

#include<conio.h>

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

void main()
{

char text[50] , rev[50];

clrscr();

cout<< "\n Enter a string : ";
gets(text);

/* calculate the length of the string */
int len  = strlen(text);

/* reverse the string */

for(int i = len - 1, k = 0; i>=0 ; i--, k++)
{
rev[k] = text[i];
}

rev[k] = '\0';

if(strcmp(text, rev) == 0)
cout<< "\n The string " << text << " is a palindrome. ";
else
cout<< "\n The string " << text << " is not a palindrome. ";



getch();
}

WAP to check a number is palindrome or not

eg.  
10201 is a palindrome
10210 is not a palindrome

#include<iostream.h>

#include<conio.h>

void main()
{
int num, rev=0;

cout<< "\n Enter a number :";
cin>> num;

/* truncate each digit from number and store the reverse of the number in rev */
int digit;
for(int i = num; i >0 ; i = i/10)
{
digit = i % 10;  // get the last digit
rev = rev* 10 + digit;
}

if( rev == num )
cout<< "\n The " << num  << " is a Palindrome. ";
else
cout << " \n The " << num << " is not a Palindrome. ";

getch();

}

WAP to print all prime numbers between 100 to 500 , that are palindrome.

#include<iostream.h>

#include<conio.h>

void main()
{
int flag,rev;

cout<< "\n The palindrome prime numbers between 100 to 500 are :\n";

for(int n = 100 ; n<=500 ; n ++ )
{
flag = 0;
/* Check Prime number for each n */ 
for(int j = 2; j < = n-1 ; j++)
{
if(n%j == 0)
{
flag = 1;
break;
}
}

rev = 0;

//reverse the number and check palindrome
if(flag == 0)
{
for(int k = n; k >=1 ; k = k/10)
{
rev = rev*10 + k%10;
}

if(rev == n)
cout<< n << " " ;
}

}

getch();

}