为什么输出总是0?

why is the output is always 0?

今天,我在 Visual Studio 2017 年开始使用 C# 使用 Windows Forms 创建一个项目。该程序应计算具有矩形底面的金字塔的体积并显示结果。

问题是,如果我点击应该显示结果的按钮,结果是 0。

这里是重要的代码:

// stores height h, side1 a, side2 b
double a, b, h;

//Reads out b from a textbox
private void txbB_TextChanged(object sender, EventArgs e)
{
    string parseB = txbB.Text;
    b = double.Parse(parseB);
}

//Reads out a from a textbox
private void txbA_TextChanged(object sender, EventArgs e)
{
    string parseA = txbA.Text;
    a = double.Parse(parseA);
}

//Reads out h from a textbox
private void txbH_TextChanged(object sender, EventArgs e)
{
    string parseH = txbH.Text;
    h = double.Parse(parseH);
}

//button which calculates the volume of the pyramid 
//when clicked and prints it to the label "LblErgebnis"
private void Cmdrechnen_Click(object sender, EventArgs e)
{
    double Total = 1/3 * h * a * b;
    string Result = Total.ToString();
    LblErgebnis.Text = Result;
}

有人能告诉我为什么结果总是 0 吗?

double Total = 1/3 * h * a * b;中,1/3是整数除法,结果为0。将其更改为1.0 / 3.0