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094. Write a program to check if the given string is palindrome or not

E.g. NITIN, LIRIL, MALAYALAM.

#include<stdio.h>
#include<conio.h>  
#include<process.h>
main()
{
	int i,j,len=0;
	char *s1,*s2;
	clrscr();
	printf("Enter the string ....");
	scanf("%s",s1);
	for(i=0;s1[i]!='\0';i++)
		len++;
	j=0;
	for(i=len-1;i>=0;i--)
	{
		s2[j]=s1[i];
		j++;
	}
	s2[j]='\0';
	for(i=0;s1[i]!='\0';i++)
		if(s1[i]!=s2[i])
		{
			printf("\nNot a palindrome");
			getch();
			exit(0);
	}
	printf("Palindrome");
	getch();
}