枚举数据类型

作者：追风剑情 发布于：2019-2-25 13:23 分类：Objective-C

示例 

  1. #import <Foundation/Foundation.h>
  2.  
  3. int main(int argc, const char * argv[]) {
  4.     @autoreleasepool {
  5.         // 定义枚举,12个月份
  6.         enum month {january = 1, february, march, april, may, june,
  7.             july, august, september, october, november, december};
  8.         enum month amonth;
  9.         int days;
  10.         
  11.         NSLog(@"Enter month number: ");
  12.         scanf(" %i", &amonth);
  13.         
  14.         switch (amonth) {
  15.             case january:
  16.             case march:
  17.             case may:
  18.             case july:
  19.             case august:
  20.             case october:
  21.             case december:
  22.                 days = 31;
  23.                 break;
  24.             case april:
  25.             case june:
  26.             case september:
  27.             case november:
  28.                 days = 30;
  29.                 break;
  30.             case february:
  31.                 days = 28;
  32.                 break;
  33.             default:
  34.                 NSLog(@"bad month number");
  35.                 days = 0;
  36.                 break;
  37.         }
  38.         
  39.         if ( days != 0 )
  40.             NSLog(@"Number of days is %i", days);
  41.         
  42.         if ( amonth == february )
  43.             NSLog(@"...or 29 if it's a leap year2");
  44.     }
  45.     return 0;
  46. }

运行测试
3333.png

标签: Objective-C

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