In less than 10 words, state what the following function does:

void strmanip(char a[]) /* receives a string as its argument */
{ 
  char *b, temp;
  b = a + strlen(a) - 1;        
  for (  ; a < b ; a++, b--)            
  {                     
          temp = *a;
          *a = *b;
          *b = temp;
  }     
  return;
}