本文介绍了满足条件时减少变量的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
public void ReserveRoom(List<reservationtype> reservation)
{
List<reservationtype> RequestReservation = new List<reservationtype>();
RequestReservation = reservation; //List that contains the test cases.
string reservationid = "0001";
int number = int.Parse(reservationid);
int count = 0;
foreach (ReservationType requestReservation in RequestReservation)
{
List<string> DateList = CreateDateList(requestReservation.StartDate, requestReservation.numDays);
foreach (Inventory inventory in RoomInventory)
{
if (requestReservation.hotelId.Equals (inventory.HotelId))
{
if (requestReservation.roomType == inventory.RoomType)
{
for (int i = 0; i < DateList.Count; i++)
{
if (DateList[i].Equals(inventory.Date) && inventory.Quantity > 0)
{
count++;
if (requestReservation.numDays == count)
{
for (int j = 0; j < DateList.Count; j++)
{
if (DateList[j].Equals(inventory.Date))
{
inventory.Quantity--;
}
}
requestReservation.reservationId = "000" + (number + 1).ToString();
requestReservation.result = ReservationType.ReservationResultType.Success;
count = 0;
foreach (Hotels h in LHotels)
{
foreach (Room rm in h.RoomList)
{
if (requestReservation.hotelId == h.HotelId && requestReservation.roomType == rm.RoomType)
{
requestReservation.cost = (requestReservation.numDays * rm.Rate);
}
}
}
} // end of if num == counts
else {
requestReservation.reservationId = null;
requestReservation.result = ReservationType.ReservationResultType.RoomNotAvailable;
count = 0;
}
} //end of if
}//end of forloop
}//end of if statement (Roomtypes)
}//end of If statement( inventory.hotelID)
} // end of foreach inventory
number++;
}// end of Foreach
serial = new XmlSerializer(RequestReservation.GetType());
sw = new StreamWriter(ReservationFilename);
serial.Serialize(sw, RequestReservation);
sw.Close();
}// End of ReserveRoom Method
我尝试过：
1）条件成立后，我做了forloop遍历每个变量，其中datelist [i] == inventory.date并从中扣除1。
2）没有for循环，条件为真后，扣除1，但根本没有变化。
What I have tried:
1)after the condition was true, i did forloop to go through each variables where datelist[i] == inventory.date and deduct 1 from it.
2) without the for loop, after condition was true, deduct 1 , but did not change at all.
推荐答案
var current;
const min = 0;
const max = 255;
var b = true;
if (b == true) {
current += 1;
if (current >= max) {
b = false;
}
}
else {
current = current - 1;
if (current <= min) {
b = true;
}
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