我在制作计算器时遇到了一些麻烦。我似乎无法输入项目名称,只能输入数字。此外,它只需要最后的价格和数量,并将它们乘以而不是整体。更新:我对代码进行了关于小计和休息的更改,但它一直告诉我
错误CS0029
无法将类型'string'隐式转换为'string [,]'错误CS0019
运算符'=='不能应用于operandstype的字符串[,]'和'int'
我似乎无法使其工作或添加列表到最后。任何帮助,将不胜感激。
int[] array;
string[,] name = new string[100, 4];
decimal counter;
decimal price;
decimal subtotal;
decimal tax;
decimal total;
decimal quantity;
subtotal = 0;
counter = 0;
array = new int[5];
while (counter <= 10)
{
Console.Write("Item{0}", counter + 1);
Console.Write(" Enter item name: ");
name = Console.ReadLine();
if (name == 0)
break;
Console.Write(" Enter price: ");
price = Convert.ToDecimal(Console.ReadLine());
counter = counter + 1;
Console.Write(" Enter quantity: ");
quantity= Convert.ToInt32(Console.ReadLine());
subtotal += price * quantity;
}
Console.WriteLine("-------------------");
Console.WriteLine("\nNumber of Items:{0}", counter);
Console.WriteLine("Subtotal is {0}", subtotal);
tax = subtotal * 0.065M;
Console.WriteLine("Tax is {0}", tax);
total = tax + subtotal;
Console.WriteLine("Total is {0}", total);
Console.WriteLine("Thanks for shopping! Please come again.");
Console.Read();
我也知道我需要在代码中使用for ( int counter = 0; counter < array.Length; counter++ )
,但它不起作用。感谢您的时间和提前帮助。
答案 0 :(得分:1)
您正在尝试将名称转换为数字:
name = Convert.ToInt32(Console.ReadLine());
if (name == 0)
break;
尝试删除&#34; Convert.ToInt&#34;像这样:
name = Console.ReadLine();
答案 1 :(得分:-1)
也许这个程序可以帮助你学习C#
。但你必须承诺试图了解它的工作原理和原因。此外,使用调试器进行操作以查看每个语句如何影响存储在变量中的值。
class Program
{
static void Main(string[] args)
{
const int max_count = 10;
string[] name = new string[max_count];
int[] quantity = new int[max_count];
decimal[] price = new decimal[max_count];
decimal subtotal = 0;
int count = 0;
// Enter Values
for(int i = 0; i<max_count; i++)
{
Console.Write("Item{0}", i+1);
Console.Write("\tEnter Item Name: ");
name[i]=Console.ReadLine();
if(name[i].Length==0)
{
break;
}
Console.Write("\tEnter Price: ");
price[i]=decimal.Parse(Console.ReadLine());
Console.Write("\tEnter Quantity: ");
quantity[i]=int.Parse(Console.ReadLine());
subtotal+=quantity[i]*price[i];
count+=1;
}
// Display Summary
Console.WriteLine("-------------------");
Console.WriteLine("\nNumber of Items:{0}", count);
Console.WriteLine("Subtotal is {0}", subtotal);
decimal tax=subtotal*0.065M;
Console.WriteLine("Tax is {0}", tax);
decimal total=tax+subtotal;
Console.WriteLine("Total is {0}", total);
Console.WriteLine("Thanks for shopping! Please come again.");
Console.Read();
}
}
这里有一个数组的结构(Program
)。有三个数组,每个数组存储不同的类型值(字符串,整数,十进制)。稍后你应该学会制作一个结构的单个数组,每个数组包含多个值。
public class Item
{
public string name;
public decimal price;
public int quantity;
}
// Usage
var cart = new List<Item>();