//---------------------------------------------------------------------------
void copie(const char source[], char destination[])
{
  for (int i=0; destination[i]=source[i]; i++);
}
//---------------------------------------------------------------------------
void minuscule(char *chaine)
{
  for (int i=0; chaine[i]; i++)
    if (chaine[i]>='A' && chaine[i]<'Z')
      chaine[i] += 'a'-'A';
}
//---------------------------------------------------------------------------
int main()
{
  char *invite = "BIENVENUE A TOUS";
  char message[50];
  copie(invite, message);
  minuscule(message);
  return 0;
}
//---------------------------------------------------------------------------