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] != ' ') 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. ", choice); 46 color_is_found = false; 47 puts("Next color, please (empty line to quit):"); 48 } 49 puts("Goodbye!"); 50 51 return 0; 52 }