Write a C procedure to reverse a string in-place.

Question

Eric T · Accepted Answer

void reverse(char* s) {
   char* back = s + strlen(s) - 1;
   for (; s < back; ++s, --back) {
      char temp = *back;
      *back = *s;
      *s = temp;
   }
}

Luke Z · Answer

void reverse (char* str)
{
   char* back = str + strlen(str) - 1;
   while (str < back)
   {
       *str = *str ^ *back;
       *back = *back ^ *str;
       *str = *str ^ *back;
       str++;
       back--;
   }
}

balla!

vsp · Answer

since it's a very simple question, they probably wanted more optimized code, with fewer additions/subtractions.

Anonymous · Answer

void reverseInPlace(char * c) {
  char tmp;
  int ptr = 0;
  int  cLen = strlen(c);
  for(ptr=0; ptr

Google

Google Interview Question

Interview Answers

Want the inside scoop on your own company?

Bowls

Followed companies

Job searches