#include <stdio.h>

// tipo "Cor"
typedef enum { BLACK, BLUE, GREEN, RED, YELLOW, WHITE } Color_t ;

// define o nome da cor
char* color_name (Color_t c)
{
  switch (c)
  {
    case BLACK   : return ("black")  ;
    case BLUE    : return ("blue")   ;
    case GREEN   : return ("green")  ;
    case RED     : return ("red")    ;
    case YELLOW  : return ("yellow") ;
    case WHITE   : return ("white")  ;
    default      : return ("") ;
  }
}

int main () 
{
  Color_t c1;

  // ...
  c1 = BLUE ;

  printf ("Cor %s\n", color_name(c1)) ;
}