1
Largura * Complemento = Subtotal + Porcentagem = Total
subtotal.Text = (Convert.ToDouble(largura.Text) * Convert.ToDouble(complemento.Text)).ToString();
total.Text = (Convert.ToDouble(subtotal.Text) % Convert.ToDouble(PercaTextBox3.Text)).ToString();
Where I’m missing the percentage?
5
The percentage symbol doesn’t calculate the percentage, you have to use the basic math to do that. Besides, I suggest learning to program in a more structured way. Learning in trial and error without knowing what you’re doing is harder, even if it doesn’t seem like it, spends more time, skips important things, and mostly teaches wrong causing tragedies.
There’s an extra error in your code that I’m gonna use to solve. Externally coming data conversion is not guaranteed and can break your application, you have to make sure you typed something that can be converted.
I did in Console because it is easier to demonstrate, but you adapt to Windows Forms. I even made one last conversion to string that will only make sense in Windows Forms.
There are meaningless conversions in the code. So reinforcement to understand what you are doing, in the current form is not learning to program. A phrase I always say:
If you don’t know everything your code does, including white space, you still don’t know how to program
using static System.Console;
public class Program {
public static void Main() {
var larguraText = "2.00";
var alturaText = "1.00";
var percText = "30";
var total = 0.0;
if (double.TryParse(larguraText, out var largura) && double.TryParse(alturaText, out var altura) && double.TryParse(percText, out var perc)) {
total = largura * altura * (perc / 100);
}
var totalText = total.ToString(); //só para fins didáticos do exemplo
WriteLine(totalText);
}
}
Behold working in the ideone. And in the .NET Fiddle. Also put on the Github for future reference.
Browser other questions tagged c# .net mathematics percentage
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Largura * Complemento = Subtotal + Porcentagem = Totalis a formula? This is not part of the code is not?– gato
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