C program for palindrome

C program for palindrome

Output:

malayalam
malayalam & malayalam is a palindrome

Output 2:

www.coderegister.co.in
ni.oc.retsigeredoc.www & www.coderegister.co.in is not a palindrome

Implementation:

#include <stdio.h> #include <string.h> #include <stdlib.h> #define MAX 1000000 void reverse(char *s) { int len=strlen(s)-1; char v[100]; int i=0; while(len>=0) { v[i++]=s[len--]; } for(len=0;len<i;len++) { s[len]=v[len]; } //s[len]='\0'; } int compare(char *s,char *v) { while(*s && (*s==*v)) s++,v++; return (*s-*v); } int main(void) { char s[MAX],v[MAX]; scanf("%s",s); strcpy(v,s); reverse(s); printf("%s & ",s); printf("%s is ",v); if(compare(s,v)==0) printf("palindrome"); else printf("not a palindrome"); return 0; }