What is the output, explain

Question

int main(void) {
      char p[20];
      char *s = "Gate015";
      int length = strlen(s);
      int i=0;
      for(i=0;i<length;i++)
        p[i]=s[length-i];
      printf("%s",p);
      return 0;
}

Answer 1

printf("%s",p);

%s prints all characters from the start address given by p till the first occurrence of '\0'; But p[0] = s[length - 0] = '\0'; So, nothing will be printed. 

The code can be corrected by 

for(i=0;i<length;i++)
        p[i]=s[length-i-1];