题解 | #返回星期数#

function _getday(value) {
    // 补全代码
    var a;
    switch(value){
        case 1:
            a = "星期一";
            break;
        case 2:
            a = "星期二";
            break;
        case 3:
            a = "星期三";
            break;
        case 4:
            a = "星期四";
            break;
        case 5:
            a = "星期五";
            break;
        case 6:
            a = "星期六";
            break;
        case 7:
            a = "星期天";
            break;
    }
    return a;
}