C / C++ / MFC

_stprintf(sz, _T("%s%X"), (nOffset < 0 ? _T("-") : "", <br />
(nOffset < 0 ? -nOffset : nOffset); 

#include <stdio.h>
#include <string.h>

int main ()
{
  char str[] = "This is a sample string";
  char key[] = "aeiou";
  char * pch;
  printf ("Vowels in '%s': ",str);
  pch = strpbrk (str, key);
  while (pch != NULL)
  {
    printf ("%c " , *pch);
    pch = strpbrk (pch+1,key);
  }
  printf ("\n");
  return 0;
}

1. Let n be the number of songs to shuffle.
   
2. Define a map of ints to strings.
   
3. For every song in the list:
   • Generate a random number r between 0 and n-1, check if the r-th entry of the map is empty, repeat until you find an empty slot.
     
   • Insert the song into the map using index r
   
   
   Joaquín M López Muñoz
   Telefónica, Investigación y Desarrollo