猜硬币的C#程序

Question

我是编程初学者，所以任何提示都将不胜感激!

我正在尝试创建一个程序，让用户猜测“抛硬币”会产生正面 (0) 还是反面 (1) 使用随机数生成器和循环作为“硬币”。该程序必须输出正确猜测占所玩游戏总数的百分比。

我试过很多不同的方法，但都不太对!这很令人沮丧。

提前感谢任何提示! -C

这基本上是我最接近的:

    for (numPlays = 0; ; numPlays++)
        {
            Console.Write("\nWrite H/h to guess Heads, T/t to guess Tails, or Q/q to quit =>  ");
            userChoice = Convert.ToChar(Console.ReadLine());

            if (userChoice == 'H' || userChoice == 'h')
            {
                if (compChoice == 0)
                {
                    Console.WriteLine("\nYOU WON");
                    numWins++;
                }
                else
                    Console.WriteLine("\nYOU LOSE");

                if (userChoice == 'Q' || userChoice == 'q')
                    if (compChoice == 1)
                    {
                        Console.WriteLine("\nYOU WON");
                        numWins++;
                    }
                    else
                        Console.WriteLine("\nYOU LOSE");

                if (userChoice == 'q' || userChoice == 'Q')
                {
                    percentWin = (double)(numWins / numPlays);
                    Console.WriteLine("\nYou won {0} out of {1} game(s) or {2:P} of the games played.", numWins, numPlays, percentWin);
                }
           }

        }

        Console.ReadKey();


    }
}

Answer 1

我对你的代码做了一些优化，希望对你有所帮助:

int numPlays = 0, numWins = 0;
int compChoice = 0;
char userChoice;
double percentWin;
Random rnd = new Random();
while (true)
{
     Console.Write("\nWrite H/h to guess Heads, T/t to guess Tails, or Q/q to quit =>  ");
     userChoice = Console.ReadKey().KeyChar;
     compChoice = rnd.Next(0, 2);
     if (char.ToLowerInvariant(userChoice) != 'q')
     {
           if (char.ToLowerInvariant(userChoice) == 'h' && compChoice == 0)
           {
                Console.WriteLine("\nYOU WON");
                numWins++;
           }
           else if (char.ToLowerInvariant(userChoice) == 't' && compChoice == 1)
           {
                Console.WriteLine("\nYOU WON");
                numWins++;
           }
           else
           {
                Console.WriteLine("\nYOU LOSE");
           }
           numPlays++;
     }
     else
     {
           percentWin = (double) numWins/numPlays;
           Console.WriteLine("\nYou won {0} out of {1} game(s) or {2:P} of the games played.", numWins, numPlays, percentWin);
           break;
     }

}

我认为你不需要解释，所有的代码都是不言自明的。但是你在计算百分比时有一个明显的错误:

 percentWin = (double)(numWins / numPlays);

这里你正在执行一个整数除法，然后将该结果转换为double，这是毫无意义因为你已经失去了你的小数点。相反，您应该将其中一个操作数转换为 double，这样它将执行双除法，您将得到正确的结果。