为了更好地理解，我将首先发布我的课程。
Program.cs的
namespace BeginnersGuidToLifting
{
class Program
{
public static readonly int width = 85;
public static readonly int height = 35;
public static readonly User user = new User();
public static readonly Goal goal = new Goal();
public static Calories calories = new Calories();
public static Nutrition nutrition = new Nutrition();
public static Menu menu = new Menu();
static void InitUser()
{
Console.WriteLine("\n### About You ###\n");
user.Name = Question.AskString("Name: ");
user.Age = Question.AskInt("Age: ");
user.Gender = Question.AskString("Gender(m/f): ");
user.Height = Question.AskInt("Height(cm): ");
user.Weight = Question.AskInt("Weight(kg): ");
}
static void InitGoals()
{
Console.WriteLine("\n### What are your Goals ### \n");
goal.GainWeight();
goal.LoseWeight();
goal.GetStronger();
goal.GetLeaner();
goal.StayFit();
goal.Hypertrophy();
Console.Write("Answer: ");
var input = Console.ReadKey();
switch (input.Key)
{
case ConsoleKey.D1:
goal.GoalStatusGainWeight = true;
goal.GoalMessage = "Your Goal is to Gain Weight";
break;
case ConsoleKey.D2:
goal.GoalStatusLoseWeight = true;
goal.GoalMessage = "Your Goal is to Lose weight";
break;
case ConsoleKey.D3:
goal.GoalStatusGetStronger = true;
goal.GoalMessage = "Your Goal is to get Stronger";
break;
case ConsoleKey.D4:
goal.GoalStatusGetLeaner = true;
goal.GoalMessage = "Your Goal is to get Leaner";
break;
case ConsoleKey.D5:
goal.GoalStatusStayFit = true;
goal.GoalMessage = "Your Goal is to Stay Fit";
break;
case ConsoleKey.D6:
goal.GoalStatusHypertrophy = true;
goal.GoalMessage = "Your Goal is Hypertrophy";
break;
default:
Console.WriteLine("Error");
break;
}
}
static void InitMenu()
{
menu.ShowMenu();
menu.Discalmer = false;
//menu.Disclamer();
}
static void BmiResult()
{
var bodyType = user.GetBodyType();
if (bodyType == User.BodyType.ReallyUnderweight)
{
Console.WriteLine("Really Underweigt");
}
else if (bodyType == User.BodyType.Underweight)
{
Console.WriteLine("Underweight");
}
else if (bodyType == User.BodyType.CloseToUnderwight)
{
Console.WriteLine("Close to Underweight");
}
else if (bodyType == User.BodyType.Healthy)
{
Console.WriteLine("at a Healthy Weight");
}
else if (bodyType == User.BodyType.Overweight)
{
Console.WriteLine("Overweight");
}
else if (bodyType == User.BodyType.Obese)
{
Console.WriteLine("Obese");
}
else if (bodyType == User.BodyType.SeverlyObese)
{
Console.WriteLine("Serverley Obese");
}
else if (bodyType == User.BodyType.MorbidlyObese)
{
Console.WriteLine("Morbidly Obese");
}
}
static void Main(string[] args)
{
Console.Title = "Beginers Guide To Lifting";
Console.SetWindowSize(width, height);
Console.SetBufferSize(width, height);
InitMenu();
var userInput = Console.ReadKey();
switch (userInput.Key)
{
case ConsoleKey.D1:
InitUser();
InitGoals();
break;
case ConsoleKey.D2:
Console.WriteLine("Press 2");
break;
default:
Console.WriteLine("Why y no work");
break;
}
//Status So Far
Console.WriteLine("\n### Your Stats ### \n");
Console.WriteLine("Name: {0} \nAge: {1} \nHeight: {2} \nWeight: {3}", user.Name, user.Age, user.Height, user.Weight);
Console.WriteLine("Goal: {0}", goal.GoalMessage);
BmiResult();
Console.Write("\nContinue(y/n) to The Programm?: ");
if (Console.ReadLine() == "y")
{
Console.Clear();
}
//Gain Weight Goal
//Introduce 5x5
var exercise = new FiveByFive();
exercise.printIntroduction();
//Show Exercises
exercise.printWorkoutWeek1();
exercise.printWorkoutWeek2();
//Show Nutrition
if (goal.GoalStatusGainWeight == true)
{
switch (user.Gender)
{
case "male":
case "m":
case "Male":
calories.GainCaloriesMale(user);
break;
case "female":
case "f":
case "Female":
calories.GainCaloriesFemale(user);
break;
}
}
//Lose Weight
if (goal.GoalStatusLoseWeight == true)
{
switch (user.Gender)
{
case "male":
case "m":
case "Male":
calories.LoseCaloriesMale(user);
break;
case "female":
case "f":
case "Female":
calories.LoseCaloriesFemale(user);
break;
}
}
}
}
}
问题出在我的主要方法中。
InitMenu();
var userInput = Console.ReadKey();
switch (userInput.Key)
{
case ConsoleKey.D1:
InitUser();
InitGoals();
break;
case ConsoleKey.D2:
Console.WriteLine("Press 2");
break;
default:
Console.WriteLine("Why y no work");
break;
}
当我按下一个时，它应该发生它显示的内容。 初始用户和初始用户目标。 然而，当我按2时，它将我带到User.cs类， 我正在为用户BMI做数学。
我真的不明白为什么在按2时会这样做，因为我想要显示的是＆＃34;按2＆＃34;或者稍后添加一个免责声明。
执行
System.DivideByZeroException：＆＃39;尝试除以零。＆＃39;
抛出是因为它试图将0与0分开，这是因为用户还没有输入。因为我想通过按2来做的是显示另一个带有一些文本的窗口。那就是。
我真的不明白为什么它会跳转到User类。
以下是 User.cs ，以便更好地理解。
namespace BeginnersGuidToLifting
{
class User
{
public enum BodyType
{
ReallyUnderweight,
Underweight,
CloseToUnderwight,
Healthy,
Overweight,
Obese,
SeverlyObese,
MorbidlyObese
}
public string Name;
//private string _gender;
public string Gender;
private int _weight;
private int _height;
private int _age;
public int Age
{
get => _age;
set
{
if (value >= 0)
{
_age = value;
}
}
}
public int Weight
{
get => _weight;
set
{
if (value >= 0)
{
_weight = value;
}
}
}
public int Height
{
get => _height;
set
{
if (value >= 0)
{
_height = value;
}
}
}
//TODO
//public string Gender
//{
// get => _gender;
// set
// {
// if (value == "female" || value == "f" || value == "male" || value == "m" )
// _gender = value;
// else
// {
// Console.WriteLine("Value Wrong");
// }
// }
//}
public int GetBmi()
{
Console.WriteLine("Weight:"+Weight);
//var bmi = Math.Round((Weight / Math.Pow(Height, 2)) * 10000);
int bmi = Weight / (Height * Height) * 10000;
Console.WriteLine("Your Body Mass Index: " + bmi);
Console.Write("That Means That you are: ");
return bmi;
}
public BodyType GetBodyType()
{
int bmi = GetBmi();
if (bmi < 16)
return BodyType.ReallyUnderweight;
else if (bmi >= 16 && bmi <= 17)
return BodyType.Underweight;
else if (bmi >= 17 && bmi <= 18.5)
return BodyType.CloseToUnderwight;
else if (bmi >= 18.5 && bmi <= 25)
return BodyType.Healthy;
else if (bmi >= 25 && bmi <= 30)
return BodyType.Overweight;
else if (bmi >= 30 && bmi <= 35)
return BodyType.Obese;
else if (bmi >= 35 && bmi <= 40)
return BodyType.SeverlyObese;
return BodyType.MorbidlyObese;
}
}
}
摘要
提前感谢您花时间阅读本文。 欢迎任何输入。我希望一切都清楚明白。
答案 0 :(得分：0)
按“2”后退出switch，它会调用BmiResult()，调用用户类中的方法。
BmiResult()调用user.GetBodyType()，在用户类上调用GetBmi()。这是您的计算发生的地方，但由于您没有在用户上设置任何值，因此每件事都默认为零。这意味着你这样做：
int bmi = 0 / (0 * 0) * 10000;
操作顺序意味着它会这样做：
int bmi = (0 / 0) * 10000;
因为除法和乘法首先在parantheses中执行，然后从左到右执行。
但是，将零乘以任何值仍然为零，因此在进行计算之前需要检查除数是否为零，或者将代码包装在try / catch中并处理它。