C#计算器逻辑
当我按9,然后按次数时,显示屏显示9,当我再次按9时,它会将其添加到第一个数字(9),而不是清除前9。所以它认为是9*99。如何在操作后清除第一次输入时的显示C#计算器逻辑,c#,C#,当我按9,然后按次数时,显示屏显示9,当我再次按9时,它会将其添加到第一个数字(9),而不是清除前9。所以它认为是9*99。如何在操作后清除第一次输入时的显示 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.T
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
string input = string.Empty;
string operand1 = string.Empty;
string operand2 = string.Empty;
char operation;
double result = 0.0;
public Form1()
{
InitializeComponent();
}
private void Multiply_Click(object sender, EventArgs e)
{
operation = '*';
if (operand1 != "")
{
calculate();
}
else
{
operand1 = input;
}
}
private void Minus_Click(object sender, EventArgs e)
{
operation = '-';
if (operand1 != "")
{
calculate();
}
else
{
operand1 = input;
}
}
private void Addition_Click(object sender, EventArgs e)
{
operation = '+';
if (operand1 != "")
{
calculate();
}
else
{
operand1 = input;
}
}
private void Divide_Click(object sender, EventArgs e)
{
operation = '/';
if (operand1 != "")
{
calculate();
}
else
{
operand1 = input;
}
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void five_Click(object sender, EventArgs e)
{
this.textBox1.Text = "";
input += "5";
this.textBox1.Text += input;
}
private void Zero_Click(object sender, EventArgs e)
{
this.textBox1.Text = "";
input += "0";
this.textBox1.Text += input;
}
private void one_Click(object sender, EventArgs e)
{
this.textBox1.Text = "";
input += "1";
this.textBox1.Text += input;
}
private void two_Click(object sender, EventArgs e)
{
this.textBox1.Text = "";
input += "2";
this.textBox1.Text += input;
}
private void three_Click(object sender, EventArgs e)
{
this.textBox1.Text = "";
input += "3";
this.textBox1.Text += input;
}
private void four_Click(object sender, EventArgs e)
{
this.textBox1.Text = "";
input += "4";
this.textBox1.Text += input;
}
private void six_Click(object sender, EventArgs e)
{
this.textBox1.Text = "";
input += "6";
this.textBox1.Text += input;
}
private void seven_Click(object sender, EventArgs e)
{
this.textBox1.Text = "";
input += "7";
this.textBox1.Text += input;
}
private void eight_Click(object sender, EventArgs e)
{
this.textBox1.Text = "";
input += "8";
this.textBox1.Text += input;
}
private void nine_Click(object sender, EventArgs e)
{
this.textBox1.Text = "";
input += "9";
this.textBox1.Text += input;
}
private void Equal_Click(object sender, EventArgs e)
{
calculate();
}
private void Decimal_Click(object sender, EventArgs e)
{
this.textBox1.Text = "";
input += ".";
this.textBox1.Text += input;
}
private void Clear_Click(object sender, EventArgs e)
{
textBox1.Clear();
}
public void calculate()
{
Console.WriteLine("performing operation" + operand1 + " " + operation + " " + operand2 + "= ???" + "the input is?" + input);
operand2 = input;
double num1, num2;
double.TryParse(operand1, out num1);
double.TryParse(operand2, out num2);
if (operation == '*')
{
result = num1 * num2;
}
if (operation == '-')
{
result = num1 * num2;
}
if (operation == '+')
{
result = num1 * num2;
}
if (operation == '/')
{
result = num1 * num2;
}
textBox1.Text = result.ToString();
input = result.ToString();
}
}
}
我想那是因为你加了
input += "9"
this.textBox1.text += input;
您总是将9添加到变量输入中。尝试清理输入。在添加新号码之前。将以下内容添加到您的班级
表格1
:
bool operationExcecuted = false;
在计算方法中添加以下行:
operationExcecuted = true;
在每个数字输入中,检查是否执行了操作。如果是,请清除输入并添加新编号。例如,数字9:
private void nine_Click(object sender, EventArgs e)
{
if(operationExcecuted)
{
input = String.Empty;
operationExcecuted = false;
}
this.textBox1.Text = "";
input += "9";
this.textBox1.Text += input;
}
如果我清除输入,每个数字将清除显示,我将只能输入单个数字。感谢您的回复。请检查要单击的操作数。如果用户单击一个操作数,程序应该知道,现在是下一个数字。干杯,伙计,我已经重新定义了逻辑,它按照预期工作