c# - 控制台重量转换器用户选择

Question

我是 C# 的新手并且制作了一些工作控制台应用程序，例如 Hello World 和 BMI 计算器。

我正在尝试制作一个从英制到公制的重量转换器，反之亦然，但我无法让用户选择他们想要做的。这是我正在努力处理的代码段:

decimal pounds;
decimal poundsconverted;
decimal kilo;
decimal kiloconverted;
string choice;

Console.WriteLine ("Press 1 to convert from imperial to metric");
Console.WriteLine ("Press 2 to convert from metric to imperial");
choice = Console.ReadLine();

if (choice (1))
    Console.WriteLine ("Please enter the weight you would like to convert in pounds (lbs) ex. 140");
    pounds = Convert.ToDecimal (Console.ReadLine());
    poundsconverted=pounds/2.2;
    Console.WriteLine("The weight in kilograms is:{0:F3}", poundsconverted);

if (choice (2))
    Console.WriteLine ("Please enter the weight you would like to conver in kilograms (kg) ex. 80");
    kilo = Convert.ToDecimal (Console.ReadLine());
    kiloconverted=pounds*2.2;
    Console.WriteLine("The weight in pounds is:{0:F3}", kiloconverted);

我的问题是 if 语句。我尝试了多种格式但无济于事。有没有更好的方法来做到这一点？是否可以使用 if 语句？

Answer 1

使用switch/case 或者if/else 这里是switch/case的例子

decimal pounds;
decimal poundsconverted;
decimal kilo;
decimal kiloconverted;
string choice;


Console.WriteLine ("Press 1 to convert from imperial to metric");
Console.WriteLine ("Press 2 to convert from metric to imperial");
choice = Console.ReadLine();
switch (choice)
{
   case 1:
     Console.WriteLine ("Please enter the weight you would like to convert in pounds (lbs) ex. 140");
        pounds = Convert.ToDecimal (Console.ReadLine());
        poundsconverted=pounds/2.2;
        Console.WriteLine("The weight in kilograms is:{0:F3}", poundsconverted);
        break;
   case 2:
      Console.WriteLine ("Please enter the weight you would like to conver in kilograms (kg) ex. 80");
        kilo = Convert.ToDecimal (Console.ReadLine());
        kiloconverted=pounds*2.2;
        Console.WriteLine("The weight in pounds is:{0:F3}", kiloconverted);
        break;
}