please help me with this question in C language Someone accidentally deleted the

Question

please help me with this question in C language

Someone accidentally deleted the C standard library, so now you have to rewrite it from scratch. Start with implementing a safe string compare function with the following prototype. Make sure to validate all the arguments. For example (but not limited to) checking if s1 and s2 are NULL Compares at most n characters of string s1 to string s2. param s1 Location of the first string buffer. param s2 Location of the second string buffer. param n maximum number of characters to compare. return integer less than 0 if s1 s2. int

Explanation / Answer

int strcmp(char   *s1, char    *s2, int n)
{
      while ((*s1 || *s2) && n--)
            if (*s1++ != *s2++)
                  return (*--s1 - *--s2);
      return 0;
}

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