如何使用if C#执行3种条件
如何使用if C#执行3种条件
提问于 2020-02-11 05:57:19
我能够让C#读到我的两个条件。我能正确地得到答案：“你吹了10个口哨”和“平均工作蓝色，你的分数是18分”。
但我无法得到答案“出色的工作红色！你的分数是40"，我的代码将错误地说”平均工作红色，你的分数是40分“。
请帮帮忙。我自己做了这个测试，以了解如何使用“如果是”来执行几个条件。
使用说明：
玩家的场景1：
- 问位
- 询问分数计数
- 问问哪个队。
- 说“普通的工作团队，你的分数是_”
玩家的场景2：
- 问位
- 问得分数。
- 问问哪个队。
- 如果得分超过20分，请说“优秀的工作团队！你的分数是_”。
裁判员方案3：
- 问位
- 询问口哨数
- 说“你吹口哨”
答案：
- 职位:裁判员
- 哨声总数: 10
- “你吹了十个口哨”
- 位置:球员
- 得分: 18
- 小组:蓝色
- “平均工作是蓝色的，你的分数是18分”
- 位置:球员
- 得分: 40
- 队:红队
- “出色的工作红，你的分数是40分”
int totalWhistles = 0, scoreCount = 0;
string position, name, team;
Console.Write("Enter position: ");
position = Console.ReadLine();
if ((position == "Player" || position == "player") && scoreCount < 20)
{
Console.Write("Enter the score count: ");
scoreCount = int.Parse(Console.ReadLine());
Console.Write("Enter team: ");
team = Console.ReadLine();
Console.WriteLine("Average job {0}, your score is {1}", team, scoreCount);
}
else if ((position == "Player" || position == "player") && scoreCount > 20)
{
Console.Write("Enter score count: ");
scoreCount = int.Parse(Console.ReadLine());
Console.Write("Enter team: ");
team = Console.ReadLine();
Console.WriteLine("Superb job {0}! Your score count is {1}", team, scoreCount);
}
else if (position == "referee" || position == "Referee")
{
Console.Write("Enter total whistles: ");
totalWhistles = int.Parse(Console.ReadLine());
Console.WriteLine("You blowed {0} whistles", totalWhistles);
}
Console.ReadLine();回答 3
Stack Overflow用户
发布于 2020-02-11 06:02:53
在用户输入scoreCount值之前，您的程序不知道该值。因此，如果position等于"Player"，程序将始终进入第一个分支，因为scoreCount被初始化为0 (在比较时scoreCount < 20始终为真)。
在检查您的状况之前，尝试读取该值。
string position, name, team;
Console.Write("Enter position: ");
position = Console.ReadLine();
if(position.ToLower() == "player")
{
int scoreCount = 0;
Console.Write("Enter the score count: ");
scoreCount = int.Parse(Console.ReadLine());
Console.Write("Enter team: ");
team = Console.ReadLine();
if(scoreCount < 20)
{
// ...
}
else
{
// ...
}
}
else if (position.ToLower() == "referee")
{
int totalWhistles = 0;
// ...
}经过一点重构
public void ProcessPosition()
{
Console.Write("Enter position: ");
position = Console.ReadLine();
if(IsPlayer(position))
{
ProcessPlayer();
}
else if (IsReferee(position))
{
ProcessReferee();
}
Console.ReadLine();
}
private bool IsPlayer(string position) => position.ToLower() == "player";
private bool IsReferee(string position) => position.ToLower() == "referee";
private ProcessPlayer()
{
Console.Write("Enter the score count: ");
var scoreCount = int.Parse(Console.ReadLine());
Console.Write("Enter team: ");
var team = Console.ReadLine();
var message = GetPlayerMessage(team, scoreCount);
Console.WriteLine(message);
}
private string GetPlayerMessage(string team, int scoreCount) => scoreCount < 20
? $"Average job {team}, your score is {scoreCount}";
: $"Superb job {team}! Your score count is {scoreCount}";请注意：，我用的是操作员)而不是if .. else，我觉得它很有用。此外，我已经将string.Format的调用替换为串内插，因为这允许以较少杂乱的方式格式化字符串。在我看来，你是用过时的教程或书籍来学习C#的。我建议你马上学习现代C#。看看最新版本的综述，或者给自己买一本最近的书(最好是C#8)。
Stack Overflow用户
发布于 2020-02-11 06:11:40
scoreCount值应该在If条件之外，而不是条件块内。检查以下代码：
Console.Write("Enter position: ");
position = Console.ReadLine();
// earlier this was inside the if condition.
Console.Write("Enter the score count: ");
scoreCount = int.Parse(Console.ReadLine());
if ((position == "Player" || position == "player") && scoreCount < 20)
{
Console.Write("Enter team: ");
team = Console.ReadLine();
//scoreCount = int.Parse(Console.ReadLine()); removed from here added on top of if conditon.
Console.WriteLine("Average job {0}, your score is {1}", team, scoreCount);
}
else if ((position == "Player" || position == "player") && scoreCount > 20)
{
Console.Write("Enter team: ");
team = Console.ReadLine();
Console.WriteLine("Superb job {0}! Your score count is {1}", team, scoreCount);
}
else if (position == "referee" || position == "Referee")
{
Console.Write("Enter total whistles: ");
totalWhistles = int.Parse(Console.ReadLine());
Console.WriteLine("You blowed {0} whistles", totalWhistles);
}始终您的scoreCount为0，如果条件仅为0，它将处于第一种情况下。
Stack Overflow用户
发布于 2020-02-11 06:32:21
int totalWhistles = 0, scoreCount = 0;
string position = "", team = "";
Console.Write("Enter position: ");
position = Console.ReadLine();
if ((position.ToLower() == "player" ))
{
Console.Write("Enter the score count: ");
scoreCount = int.Parse(Console.ReadLine());
Console.Write("Enter team: ");
team = Console.ReadLine();
if(scoreCount > 20)
Console.WriteLine("Superb job {0}! Your score count is {1}", team, scoreCount);
else
Console.WriteLine("Average job {0}! Your score count is {1}", team, scoreCount);
}
else if (position.ToLower() == "referee")
{
Console.Write("Enter total whistles: ");
totalWhistles = int.Parse(Console.ReadLine());
Console.WriteLine("You blowed {0} whistles", totalWhistles);
}
Console.ReadLine();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/60162800
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