enum season currentSeason = spring;

   enum season{

        spring = 1,

       summer,

       autumn,

        winter  //没有,

   };//;

    //变量类型是 enum season   变量名是 currentSeason  变量初始值为spring

    enum season currentSeason = spring;

    printf("输入一个整型数字（1～4）:");

    scanf("%d",&currentSeason);

    switch (currentSeason) {

        case spring:

            printf("放风筝");

            break;

        case summer:

            printf("游泳");

            break;

        case autumn:

            printf("看枫叶");

            break;

        case winter:

            printf("滑雪");

            break;

        default:

            break;

    }

    return 0;

}

enum season currentSeason = spring;

原文：http://www.cnblogs.com/xlsn0w/p/4819678.html