to find if a given string is palindrome or is not palindrome

Question

I made a program to find if a entered string is palindrome or not palindrome but it always says that its not a palindrome

#include  
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Answer 1

Your central comparison is flawed:

if (str[i] != str[i+halflen]) 

This isn't comparing the two characters you think it is.

Try entering "HelloHello" into your program, it will say it is a palindrome!

You need to compare these two:

if (str[i] != str[len-i-1])

(and fix the braces, as suggested in the other answer)