所以,下面是我所得到的。它一直告诉我我无法在小数或双精度上使用数学运算符。不幸的是,这些是我必须使用的。我想要做的是将长度测量从英制转换为公制。我已经查看了许多其他与此相关的问题,并且能够弄清楚部分代码以及如何让它让我做一个“if”语句。但我就是想不通它的数学部分。谁能指出我正确的方向?
public partial class Form1 : Form
{
string conversions;
decimal meter, feet, centimeter, inches, miles, kilometers;
public Form1()
{
InitializeComponent();
}
private void btnCalculate_Click(object sender, EventArgs e)
{
calculateConversions();
}
private void Form1_Load(object sender, EventArgs e)
{
cbConversion.SelectedText = "Miles to Kilometers";
string[] Conversion = new string[] { "Miles to Kilometers",
"Kilometers to Miles",
"Feet to Meters",
"Meters to Feet",
"Inches to Centimeters",
"Centermeters to Inches" };
{ }
for (int i = 0; i < Conversion.Length; i++)
{
cbConversion.Items.Add(Convert.ToString(Conversion[i]));
}
miles = 0m;
kilometers = 0m;
feet = 0m;
meter = 0m;
inches = 0m;
centimeter = 0m;
}
private void cbConversion_SelectedIndexChanged(object sender, EventArgs e)
{
conversions = Convert.ToString(cbConversion.SelectedItem);
IList<string> lstString = new List<string>();
lstString.Add("Miles:");
lstString.Add("Kilometers:");
lstString.Add("Feet:");
lstString.Add("Meters:");
lstString.Add("Inches:");
lstString.Add("Centimeters:");
label2.Text = lstString[cbConversion.SelectedIndex];
IList<string> lstStringTwo = new List<string>();
lstStringTwo.Add("Kilometers:");
lstStringTwo.Add("Miles:");
lstStringTwo.Add("Meters:");
lstStringTwo.Add("Feet:");
lstStringTwo.Add("Centimeters:");
lstStringTwo.Add("Inches:");
label3.Text = lstStringTwo[cbConversion.SelectedIndex];
}
我什至翻阅了我的书,但无法弄清楚(这是一项家庭作业)我拥有的 GUI。它是通过组合框选择的,输入的文本被计算到转换中。一切正常,但数学
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