1 /* enum.c -- uses enumerated values */
2 #include <stdio.h>
3 #include <string.h> // for strcmp()
4 #include <stdbool.h> // C99 feature
5
6 enum spectrum {red, orange, yellow, green, blue, violet};
7 const char * colors[] = {"red", "orange", "yellow",
8 "green", "blue", "violet"};
9 #define LEN 30
10
11 int main(void)
12 {
13 char choice[LEN];
14 enum spectrum color;
15 bool color_is_found = false;
16
17 puts("Enter a color (empty line to quit):");
18 while (gets(choice) != NULL && choice[0] != '\0')
19 {
20 for (color = red; color <= violet; color++)
21 {
22 if (strcmp(choice, colors[color]) == 0)
23 {
24 color_is_found = true;
25 break;
26 }
27 }
28 if (color_is_found)
29 switch(color)
30 {
31 case red : puts("Roses are red.");
32 break;
33 case orange : puts("Poppies are orange.");
34 break;
35 case yellow : puts("Sunflowers are yellow.");
36 break;
37 case green : puts("Grass is green.");
38 break;
39 case blue : puts("Bluebells are blue.");
40 break;
41 case violet : puts("Violets are violet.");
42 break;
43 }
44 else
45 printf("I don't know about the color %s.\n", choice);
46 color_is_found = false;
47 puts("Next color, please (empty line to quit):");
48 }
49 puts("Goodbye!");
50
51 return 0;
52 }
