我试图使用一种方法来计算汇率，然后将该参数传递给main中的方法。我不确定我是否已经正确地转换了钱，因为我无法弄清楚在main中调用方法时要把什么放入参数中。
例如:交换(不知道在这里放什么);
也不确定我是否正确地使用了交换方法。程序一直运行到询问用户要兑换哪种货币，但只有当我注释掉兑换方法时才会这样。真的卡住了，有什么建议吗?
我想我可能必须为每一种货币分配价值瑞典克朗，美元，欧元，但不确定从那里做什么…
任何帮助都将非常感激!
(如果我在这个问题上输入了错误的代码，我很抱歉，不确定如何使它看起来更干净)
----这是一个控制台应用程序----
class Program
{
static void Main(string[] args)
{
writeMenu();
//exchange();
//exchange(choiceFromCurrency, coiceToCurrency, valueToExchange);
Console.ReadKey();
}
public static void writeMenu()
{
Console.WriteLine("Welcome to your next level Currency Converter!");
Console.WriteLine("---We---Change---Your---Money---For---You---");
Console.WriteLine(" -------So---You---Dont---Have---To!-------nn");
Console.WriteLine("What is your base currency?n");
Console.WriteLine("1 = SEK, 2= USD or 3= EUR?");
string userInput = Console.ReadLine();
if (userInput == "1")
{
Console.WriteLine("You have chosen SEK (Swedish Krona)n");
}
else if (userInput == "2")
{
Console.WriteLine("You have chosen USD (United States Dollar)n");
}
else
{
Console.WriteLine("You have chosen EUR (Euro)n");
}
Console.WriteLine("Which currency would you like to change your money to?n");
string userInput2 = Console.ReadLine();
if (userInput2 == "1")
{
Console.WriteLine("You have chosen SEK (Swedish Krona)n");
}
else if (userInput2 == "2")
{
Console.WriteLine("You have chosen USD (United States Dollar)n");
}
else
{
Console.WriteLine("You have chosen EUR (Euro)n");
}
}
public static decimal exchange(decimal currencyToExchangeFrom, decimal currencyToExchangeTo )
{
Console.WriteLine("How much would you like to exchange?n");
string amountToExchange = Console.ReadLine();
decimal amountToConvert = 0;
decimal.TryParse(amountToExchange, out amountToConvert);
decimal newValue;
// SEK
if(currencyToExchangeFrom == 1)
{
// SEK - SEK
if (currencyToExchangeTo == 1)
{
Console.WriteLine("You have your money, go spend it!");
}
// sek -usd
if (currencyToExchangeTo == 2)
{
newValue = amountToConvert / 8.50m;
Console.WriteLine("You now have" + newValue + " in USD");
}
}
//sek - eur
if(currencyToExchangeFrom == 2)
{
amountToConvert / 9.49m;
Console.WriteLine("You now have" + newValue + " in EUR");
}
// usd - eur
if (currencyToExchangeFrom == 3)
{
amountToConvert * 0.90m;
Console.WriteLine("You now have" + newValue + " in EUR");
}
这里有一些让你开始的想法…我感觉这是作业，所以我只做了一些简单的修改。
static void Main(string[] args)
{
begin();
Console.ReadLine();
}
public static void begin()
{
Console.WriteLine("Welcome to your next level Currency Converter!");
Console.WriteLine("---We---Change---Your---Money---For---You---");
Console.WriteLine(" -------So---You---Dont---Have---To!-------nn");
Console.WriteLine("What is your base currency?n");
Console.WriteLine("1 = SEK, 2= USD or 3= EUR?");
ConsoleKeyInfo keyPress = Console.ReadKey(true);
int uConvertFrom = getUserInput(keyPress);
if (uConvertFrom > -1)
{
switch (uConvertFrom)
{
case 1:
Console.WriteLine("You have chosen SEK (Swedish Krona)n");
break;
case 2:
Console.WriteLine("You have chosen USD (United States Dollar)n");
break;
case 3:
Console.WriteLine("You have chosen EUR (Euro)n");
break;
}
}
else
{
if (uConvertFrom == -2)
{
//break;
}
else
{
Console.WriteLine("You didn't enter a valid response. Please try again");
begin();
}
}
Console.WriteLine("Which currency would you like to change your money to?n");
keyPress = Console.ReadKey(true);
int uConvertTo = getUserInput(keyPress);
if (uConvertTo > -1) {
switch (uConvertTo)
{
case 1:
Console.WriteLine("You have chosen SEK (Swedish Krona)n");
break;
case 2:
Console.WriteLine("You have chosen SEK (Swedish Krona)n");
break;
case 3:
Console.WriteLine("You have chosen USD (United States Dollar)n");
break;
case 4:
Console.WriteLine("You have chosen EUR (Euro)n");
break;
}
}
else
{
if (uConvertFrom == -2)
{
//break;
}
else
{
Console.WriteLine("You didn't enter a valid response. Please try again");
begin();
}
}
exchange((decimal)uConvertFrom, (decimal)uConvertTo);
}
private static int getUserInput(ConsoleKeyInfo keyPress)
{
if (keyPress.Key == ConsoleKey.Escape)
{
Console.WriteLine("Thank you for using. Exiting now.");
return -2;
}
int ret = -1;
if (int.TryParse(keyPress.KeyChar.ToString(), out ret))
{
return ret;
}
else
{
return -1;
}
}
public static decimal exchange(decimal currencyToExchangeFrom, decimal currencyToExchangeTo)
{
Console.WriteLine("How much would you like to exchange?n");
string amountToExchange = Console.ReadLine();
decimal amountToConvert = 0;
decimal.TryParse(amountToExchange, out amountToConvert);
decimal newValue = (decimal)0.000;
// SEK
if (currencyToExchangeFrom == 1)
{
// SEK - SEK
if (currencyToExchangeTo == 1)
{
Console.WriteLine("You have your money, go spend it!");
}
// sek -usd
if (currencyToExchangeTo == 2)
{
newValue = amountToConvert / 8.50m;
Console.WriteLine("You now have" + newValue.ToString("C2") + " in USD");
}
}
//sek - eur
if (currencyToExchangeFrom == 2)
{
amountToConvert /= 9.49m;
Console.WriteLine("You now have" + newValue.ToString("C2") + " in EUR");
}
// usd - eur
if (currencyToExchangeFrom == 3)
{
amountToConvert *= 0.90m;
Console.WriteLine("You now have" + newValue.ToString("C2") + " in EUR");
}
return (decimal).001;
}