form1.cs

相信这个程序对已经学习C#很久而刚刚入门图形界面编程的初学者有用

#region Using directives

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Windows.Forms;

#endregion

namespace MathsOperators
{
    partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void calculate_Click(object sender, System.EventArgs e)
        {
            try
            {
                if (addition.Checked)
                    addValues();
                else if (subtraction.Checked)
                    subtractValues();
                else if (multiplication.Checked)
                    multiplyValues();
                else if (division.Checked)
                    divideValues();
                else if (remainder.Checked)
                    remainderValues();
            }
            catch (Exception caught)
            {
                expression.Text = "";
                result.Text = caught.Message;
            }
        }

        private void addValues()
        {
            int lhs = int.Parse(lhsOperand.Text);
            int rhs = int.Parse(rhsOperand.Text);
            int outcome;
            outcome = lhs + rhs;
            expression.Text = lhsOperand.Text + " + " + rhsOperand.Text;
            result.Text = outcome.ToString();
        }

        private void subtractValues()
        {
            int lhs = int.Parse(lhsOperand.Text);
            int rhs = int.Parse(rhsOperand.Text);
            int outcome;
            outcome = lhs - rhs;
            expression.Text = lhsOperand.Text + " - " + rhsOperand.Text;
            result.Text = outcome.ToString();
        }

        private void multiplyValues()
        {
            int lhs = int.Parse(lhsOperand.Text);
            int rhs = int.Parse(rhsOperand.Text);
            int outcome;
            outcome = lhs * rhs;
            expression.Text = lhsOperand.Text + " * " + rhsOperand.Text;
            result.Text = outcome.ToString();
        }

        private void divideValues()
        {
            int lhs = int.Parse(lhsOperand.Text);
            int rhs = int.Parse(rhsOperand.Text);
            int outcome;
            outcome = lhs / rhs;
            expression.Text = lhsOperand.Text + " / " + rhsOperand.Text;
            result.Text = outcome.ToString();
        }

        private void remainderValues()
        {
            int lhs = int.Parse(lhsOperand.Text);
            int rhs = int.Parse(rhsOperand.Text);
            int outcome;
            outcome = lhs % rhs;
            expression.Text = lhsOperand.Text + " % " + rhsOperand.Text;
            result.Text = outcome.ToString();
        }

        private void quit_Click(object sender, System.EventArgs e)
        {
            Application.Exit();
        }
    }
}