function dayToWeek(day) {
let res = ''
if(day === 0) {
res = '周一'
} else if (day === 1) {
res = '周二'
} else if (day === 2) {
res = '周三'
} else if (day === 3) {
res = '周四'
} else if (day === 4) {
res = '周五'
} else if (day === 5) {
res = '周六'
} else if (day === 6) {
res = '周日'
} else {
throw new RangeError('取值有误')
}
return res
}
function dayToWeek(day) {
switch(day){
case 1: return '周一'
case 2: return '周二'
case 3: return '周三'
case 4: return '周四'
case 5: return '周五'
case 6: return '周六'
default: throw new RangeError("取值有误")
}
}
function dayToWeek(day) {
let weekArr = ['周一', '周二', '周三', '周四', '周五', '周六', '周日']
return weekArr[day]
}