C# 对不正确的输入使用正确的循环

我尝试输入一个循环，以阻止区域数低于0或高于5，我尝试输入do while循环，但即使输入了不正确的输入，它仍会执行下一个代码块。我已经用循环对该部分进行了注释。非常感谢您的帮助，谢谢

const int MaxItems = 5; // max size of array needed 
double[] itemCosts = new double[MaxItems];
int jobType; // valid values are 1=normal, 2=waterproofing, 3=skim 
int nAreas;
int i;
string customer;
double totalCost = 0.0;
double averageCost;
const double discountPrice = 800; // price at which discount available 
const double discountRate = 0.1; // discount rate 
const double setupCostPerArea = 30.00;

// cost of moving furniture, carpets etc.     

double discount, discountedTotal; // discount amount and discounted total 
double width, height; // width and height of plaster area 
double[] basePrices = { 0, 35.0, 30.0, 20.0 };  // added 0 as index placeholder, so 35 can be selected using 1, and so forth.
// prices per square metre for standard, plasterboard and skim, and skim only 

Console.Write("enter name of customer: ");
customer = Console.ReadLine();

Console.Write("enter number of plaster areas to quote for: ");
nAreas = Convert.ToInt32(Console.ReadLine());

do
{
    Console.WriteLine("Please Enter numbers of rooms between 1 and 5 only!!!!");
} while (nAreas < 1 && nAreas > 5); // loop

for (i = 0; i < nAreas; i++)
{
    Console.WriteLine("Data entry for area {0}", i + 1);

    Console.Write("enter 1 (standard), 2 (plasterboard and skim) or 3 (skim only): ");
    jobType = Convert.ToInt32(Console.ReadLine());

    Console.Write("enter width of area {0} in metres: ", i + 1);
    width = Convert.ToDouble(Console.ReadLine());

    Console.Write("enter height of area {0} in metres: ", i + 1);
    height = Convert.ToDouble(Console.ReadLine());

    // add base area cost to price based on area and type of plaster 
    itemCosts[i] = setupCostPerArea + (basePrices[jobType] * (width * height));
    totalCost += itemCosts[i];
}

averageCost = totalCost / nAreas;

// main report heading 
Console.WriteLine("\n");
Console.WriteLine("Plasterers R US Job Costing Report");
Console.WriteLine("===================================");
Console.WriteLine("\nName of customer: {0}\n", customer);
Console.WriteLine("No. of plaster areas: {0}", nAreas);
Console.WriteLine("Average Cost per area £{0:0.00}", averageCost);
// output subheadings 
Console.WriteLine("Area\tCost\tDifference From Average");
for (i = 0; i < nAreas; i++)
{
    Console.Write("{0}\t", i + 1);
    Console.Write("£{0:0.00}\t", itemCosts[i]);
    Console.WriteLine("£{0:0.00}", itemCosts[i] - averageCost);
}
Console.WriteLine("Total Cost £{0:0.00}", totalCost);
if (totalCost > discountPrice)
{
    discount = totalCost * discountRate;
    discountedTotal = totalCost - discount;
    Console.WriteLine(" - Discount of £{0:0.00}", discount);
    Console.WriteLine(" Discounted Total £{0:0.00}", discountedTotal);
}

Console.WriteLine("press enter to continue");
Console.ReadLine();

const int MaxItems=5；//所需阵列的最大大小
double[]项目成本=新的double[MaxItems]；
int jobType；//有效值为1=正常，2=防水，3=脱脂
国际纳里亚；
int i；
串客户；
双重总成本=0.0；
平均成本加倍；
常数双折扣价格=800；//有折扣的价格
常数双偏心率=0.1；//贴现率
const-double-setupCostPerArea=30.00；
//移动家具、地毯等的费用。
双重折扣，折扣总额；//折扣金额和折扣总额
双宽度、双高度；//抹灰区域的宽度和高度
双[]基准价格={0,35.0,30.0,20.0}；//添加了0作为索引占位符，因此可以使用1选择35，以此类推。
//标准板、石膏板和撇渣板以及仅撇渣板的每平方米价格
控制台。写入（“输入客户名称：”）；
customer=Console.ReadLine（）；
控制台。写下（“输入要引用的石膏区域数量：”）；
nAreas=Convert.ToInt32（Console.ReadLine（））；
做
{
Console.WriteLine（“请只输入1到5之间的房间数量！！！！”）；
}而（nAreas<1&&nAreas>5）；//环
对于（i=0；i折扣价格）
{
折扣=总成本*折扣；
折扣总额=总成本-折扣；
Console.WriteLine（“折扣为{0:0.00}”，折扣）；
Console.WriteLine（“折扣总额{0:0.00}”，折扣总额）；
}
Console.WriteLine（“按enter键继续”）；
Console.ReadLine（）；

do
{
控制台。写下（“输入要引用的石膏区域数量：”）；
nAreas=Convert.ToInt32（Console.ReadLine（））；
如果（nAreas<1 | | nAreas>5）
Console.WriteLine（“请只输入1到5之间的房间数量！！！！”）；
}而（nAreas<1 | | nAreas>5）；//环

两个问题：

您没有在循环中要求新的输入

循环的退出条件错误-非法are数小于1或大于5

针对以下两个方面进行调整：

do
{
   Console.Write("enter number of plaster areas to quote for: ");
   nAreas = Convert.ToInt32(Console.ReadLine());

   if(nAreas < 1 || nAreas > 5)
      Console.WriteLine("Please Enter numbers of rooms between 1 and 5 only!!!!");

} while (nAreas < 1 || nAreas > 5); // loop

do
{
控制台。写下（“输入要引用的石膏区域数量：”）；
nAreas=Convert.ToInt32（Console.ReadLine（））；
如果（nAreas<1 | | nAreas>5）
Console.WriteLine（“请只输入1到5之间的房间数量！！！！”）；
}而（nAreas<1 | | nAreas>5）；//环

您需要在do while循环中增加nAreas变量。如

nAreas++

Number不能同时小于1和大于5

do
{
   Console.Write("enter number of plaster areas to quote for: ");
   nAreas = Convert.ToInt32(Console.ReadLine());

   if(nAreas < 1 || nAreas > 5)
      Console.WriteLine("Please Enter numbers of rooms between 1 and 5 only!!!!");

} while (nAreas < 1 || nAreas > 5); // loop