Answer / swapnil chhajer

//////////////////////////////////////////////////
//////// PROGRAM TO CHECK PALINDROME //////////
///// Developed By : Swapnil Chhajer ////////
//////////////////////////////////////////////////



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

int palindrome(int n)
{
char temp[10];
itoa(n,temp,10);
int len=strlen(temp);
int ret;

if(len == 1)
{
return 1;
}
else if(len == 2)
{
return(temp[0] == temp[1]);
}
else
{
if(temp[0] == temp[len-1])
{
temp[len-1]='\0';
ret = palindrome(atoi(temp+1));
}
else
{
return 0;
}
}
return ret;
}


int main()
{
int n;
printf("Enter the number : ");
scanf("%d",&n);
if(palindrome(n) == 1)
printf("\n\n:: PALINDROME ::");
else
printf("\n\n:: NOT A PALINDROME ::");
getchar();
return 0;
}

Answer / nikhil kumar saraf

void main()
{
int no,n,r=0,sum,a,c;
clrscr();
printf("Enter the number:-");
scanf("%d",&no);
n=no;
c=0;
while(n!=0)
{
n=n/10;
c++;
}
if(c!=5)
{
printf("The given number is not a five digit no.");
break;
}
else
{
n=no;
while(n!=0)
{
a=n%10;
r=(r*10)+a;
n=n/10;
}
if(r==no)
printf("The given no. is a pallidrom no.");
else
printf("The given no. is not pallidrom no.");
}
getch();
}

main use of recursive function a) processing speed high b) reduce program length/reduce repeated statements c) if you do not, use iterative methods like, for, while or do-while d) all the above

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