每次按下按鈕時如何計算

Question

每次按下按鈕時如何更新計算，而不必每次都輸入新值？

 private void buttonNextMonth_Click(object sender, EventArgs e)
    {

        int month = 0;
        decimal monthlyRate, annualRate, monthlySavings, balance, initialSavings;

            annualRate = decimal.Parse(textBox2.Text);
            initialSavings = decimal.Parse(textBox1.Text);
            monthlyRate = annualRate / 12;
            monthlySavings = initialSavings * 1;
            balance = (monthlyRate * monthlySavings) + initialSavings;
            month++;

            textBox4.Text = balance.ToString();
            textBox3.Text = month.ToString();

Answer 1

將您的計數器保持在點擊事件之外，這樣它就不會在您每次點擊按鈕時初始化

像這樣

 int month = 0;
 private void buttonNextMonth_Click(object sender, EventArgs e)
 {
    decimal monthlyRate, annualRate, monthlySavings, balance, initialSavings;

        annualRate = decimal.Parse(textBox2.Text);
        initialSavings = decimal.Parse(textBox1.Text);
        monthlyRate = annualRate / 12;
        monthlySavings = initialSavings * 1;
        balance = (monthlyRate * monthlySavings) + initialSavings;
        month++;

        textBox4.Text = balance.ToString();
        textBox3.Text = month.ToString();