枚举 enum
1. 完整例子
| 1 | enum Color { RED = 0, GREEN = 1, BLUE = 2 }; |
| 2 | |
| 3 | int main(void) { |
| 4 | enum Color c = GREEN; |
| 5 | if (c == GREEN) { |
| 6 | /* ... */ |
| 7 | } |
| 8 | printf("%d\n", (int)c); |
| 9 | return 0; |
| 10 | } |
2. 用途
- 状态机状态
- 错误码
- 替代满屏魔法数字
| 1 | enum Color { RED = 0, GREEN = 1, BLUE = 2 }; |
| 2 | |
| 3 | int main(void) { |
| 4 | enum Color c = GREEN; |
| 5 | if (c == GREEN) { |
| 6 | /* ... */ |
| 7 | } |
| 8 | printf("%d\n", (int)c); |
| 9 | return 0; |
| 10 | } |