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                [TOC] # 定義 枚舉:將變量的值一一列舉出來,變量的值只限于列舉出來的值的范圍內 枚舉類型定義 ~~~ enum 枚舉名 { 枚舉值表 } ~~~ * 在枚舉值表中應列出所有可用值,也稱為枚舉元素 * 枚舉值是常量,不能在程序中用賦值語句再對它賦值 * 枚舉元素本身由系統定義了一個表示序號的數值從0開始順序定義0,1,2... 我們也可以給每個名字都指定一個值: ~~~ enum week{ Mon = 1, Tues = 2, Wed = 3, Thurs = 4, Fri = 5, Sat = 6, Sun = 7 }; ~~~ 更為簡單的方法是只給第一個名字指定值: ~~~ enum week{ Mon = 1, Tues, Wed, Thurs, Fri, Sat, Sun }; ~~~ 這樣枚舉值就從 1 開始遞增,跟上面的寫法是等效的 枚舉是一種類型,通過它可以定義枚舉變量: ~~~ enum week a, b, c; ~~~ 也可以在定義枚舉類型的同時定義變量: ~~~ enum week{ Mon = 1, Tues, Wed, Thurs, Fri, Sat, Sun } a, b, c; ~~~ 有了枚舉變量,就可以把列表中的值賦給它: ~~~ enum week{ Mon = 1, Tues, Wed, Thurs, Fri, Sat, Sun };enum week a = Mon, b = Wed, c = Sat; ~~~ 或者: ~~~ enum week{ Mon = 1, Tues, Wed, Thurs, Fri, Sat, Sun } a = Mon, b = Wed, c = Sat; ~~~ # 使用 ~~~ enum colors { red, bule, yellow, black, white, green }clo; int main() { int val; scanf("%d", &val); switch (val) { case red: printf("紅色\n"); break; case bule: printf("藍色\n"); break; case yellow: printf("黃色\n"); break; case black: printf("黑色\n"); break; case white: printf("白色\n"); break; case green: printf("綠色\n"); break; default: printf("沒有\n"); break; } system("pause"); return 0; } ~~~ 輸入一個2,就出現黃色
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