检查一个数字是否在范围内
检查一个数字是否在范围内
提问于 2015-07-17 02:00:58
我试着用一个ints数组制作一个主谋游戏，我让用户猜一个4-10之间的数字序列，而不是颜色。我的GetAValidNumber应该向用户显示一个提示符，并在参数中指定的最小/最大范围内从用户那里获得一个数字。如果输入的数字超出了最小/最大范围，那么应该显示一条错误消息，并再次提示用户输入该数字，但由于某种原因，它没有正确验证。
如有任何指导，将不胜感激。
public static int GetAValidNumber(string inputMessage)
{
// declare variables
int validInteger;
bool inputIsValid = false;
int lowValue = 1;
int highValue = 10;
while (!int.TryParse(Console.ReadLine(), out validInteger))
{
Console.WriteLine("Invalid entery - try again.");
Console.Write(inputMessage, lowValue, highValue);
do
{
while (!int.TryParse(Console.ReadLine(), out validInteger))
{
Console.WriteLine("Invalid entery - try again.");
Console.Write(inputMessage);
}
if (validInteger < lowValue || validInteger > highValue)
{
Console.WriteLine("Your number is out of Range: ");
}
else
{
inputIsValid = true;
}
} while (validInteger < lowValue || validInteger > highValue);
}
return validInteger;
}
// This method directs the play of the game
public static void PlayGame()
{
int userNumbers;
int userGuess;
int difficulty;
int randomNumbers;
Console.WriteLine("How Many Numbers Would You Like To Use When Playing(4-10): ");
userNumbers = GetAValidNumber(Console.ReadLine());
Console.WriteLine("Choose a difficulty level (1 -3");
difficulty = GetAValidNumber(Console.ReadLine());
Console.WriteLine("A 5-digit number has been chosen. Each possible digit may be the number 1, 2, 3, or 4");
Console.ReadLine();
Console.WriteLine("Enter Your Guess {0} guesses remaning", GetGameDifficulty(difficulty, randomNumbers = GetRandomNumberCount(difficulty)));
userGuess = GetAValidNumber(Console.ReadLine());
Console.WriteLine("Your Guess was {0}, Your Results are {1}", userGuess, CountHits(userGuess, randomNumbers));
Console.ReadLine();
}回答 1
Stack Overflow用户
回答已采纳
发布于 2015-07-17 02:06:02
下面是代码的简化版本：
public static int GetAValidNumber(string inputMessage)
{
int validInteger = 0;
//Range between 4 to 10
int lowValue = 4;
int highValue = 10;
int.TryParse(inputMessage, out validInteger);
while (validInteger < lowValue || validInteger > highValue)
{
Console.WriteLine("Invalid entery - try again.");
inputMessage = Console.ReadLine();
int.TryParse(inputMessage, out validInteger);
}
return validInteger;
}这里的问题是，您有多个while循环，无法正确验证您的输入。
请注意，在其他验证数字输入时，需要不同的范围，因此我建议将lowValue和highValue设置为函数的额外参数：
public static int GetAValidNumber(string inputMessage, int lowValue, int highValue)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/31467332
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