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 Cal{
public partial class Form1 : Form {
public double num1;
public int temp = 0;
//记录存储计算方式 public Form1() {
InitializeComponent();
}
private void eq_Click(object sender, EventArgs e) {
switch (temp) {
//加法运算 case 1: try {
result.Text = (num1 + double.Parse(result.Text)).ToString();
}
catch (Exception) {
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally {
temp = 0;
}
break;
//减法运算 case 2: try {
result.Text = (num1 - double.Parse(result.Text)).ToString();
}
catch (Exception) {
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally {
temp = 0;
}
break;
//乘法运算 case 3: try {
result.Text = (num1 * double.Parse(result.Text)).ToString();
}
catch (Exception) {
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally {
temp = 0;
}
break;
//除法运算，讨论分母为零的情况 case 4: if (double.Parse(result.Text)==0) {
MessageBox.Show("除数不能为零", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
result.ResetText();
}
else {
result.Text = (num1 / double.Parse(result.Text)).ToString();
temp = 0;
}
break;
case 5: try {
result.Text = (num1 % double.Parse(result.Text)).ToString();
}
catch (Exception) {
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally {
temp = 0;
}
break;
}
}
private void empty_Click(object sender, EventArgs e) {
result.Text = "0";
num1 = 0;
temp = 0;
//清除 //if (result.Text.Length > 0) //{
// result.Text = result.Text.Substring(0, result.Text.Length - 1);
//}
}
private void Zero_Click(object sender, EventArgs e) {
if (result.Text == "0") {
result.Text = "0";
}
else {
//前边有数字时，则直接在后边加上. result.Text = result.Text + "0";
}
}
private void one_Click(object sender, EventArgs e) {
if (result.Text == "0") {
result.Text = "1";
}
else {
//前边有数字时，则直接在后边加上. result.Text = result.Text + "1";
}
}
private void two_Click(object sender, EventArgs e) {
if (result.Text == "0") {
result.Text = "2";
}
else {
//前边有数字时，则直接在后边加上. result.Text = result.Text + "2";
}
}
private void three_Click(object sender, EventArgs e) {
if (result.Text == "0") {
result.Text = "3";
}
else {
//前边有数字时，则直接在后边加上. result.Text = result.Text + "3";
}
}
private void four_Click(object sender, EventArgs e) {
if (result.Text == "0") {
result.Text = "4";
}
else {
//前边有数字时，则直接在后边加上. result.Text = result.Text + "4";
}
}
private void five_Click(object sender, EventArgs e) {
if (result.Text == "0") {
result.Text = "5";
}
else {
//前边有数字时，则直接在后边加上. result.Text = result.Text + "5";
}
}
private void six_Click(object sender, EventArgs e) {
if (result.Text == "0") {
result.Text = "6";
}
else {
//前边有数字时，则直接在后边加上. result.Text = result.Text + "6";
}
}
private void seven_Click(object sender, EventArgs e) {
if (result.Text == "0") {
result.Text = "7";
}
else {
//前边有数字时，则直接在后边加上. result.Text = result.Text + "7";
}
}
private void eight_Click(object sender, EventArgs e) {
if (result.Text == "0") {
result.Text = "8";
}
else {
//前边有数字时，则直接在后边加上. result.Text = result.Text + "8";
}
}
private void nine_Click(object sender, EventArgs e) {
if (result.Text == "0") {
result.Text = "9";
}
else {
//前边有数字时，则直接在后边加上. result.Text = result.Text + "9";
}
}
private void point_Click(object sender, EventArgs e) {
//小数点按键，初始为空，直接按 . 键则显示为0.多少 if (result.Text == "") {
result.Text = "0.";
}
//如果再次输入.则返回都输入的字符后边并提示信息 else if (result.Text.IndexOf(".") >= 0) {
MessageBox.Show("已经输入小数点,无须再次输入", "提示");
}
else {
//前边有数字时，则直接在后边加上. result.Text = result.Text + ".";
}
}
private void add_Click(object sender, EventArgs e) {
temp = 1;
try {
num1 = double.Parse(result.Text);
}
catch (Exception) {
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally {
result.Text = "";
//随后让文本框归空 }
}
private void mul_Click(object sender, EventArgs e) {
temp = 3;
try {
num1 = double.Parse(result.Text);
}
catch (Exception) {
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally {
result.Text = "";
//随后让文本框归空 }
}
private void sub_Click(object sender, EventArgs e) {
temp = 2;
try {
num1 = double.Parse(result.Text);
}
catch(Exception) {
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally {
result.Text = "";
//随后让文本框归空 }
}
private void Button1_Click(object sender, EventArgs e) {
temp = 4;
try {
num1 = double.Parse(result.Text);
}
catch (Exception) {
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally {
result.Text = "";
//随后让文本框归空 }
}
private void per_Click(object sender, EventArgs e) {
temp = 5;
try {
num1 = double.Parse(result.Text);
}
catch (Exception) {
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally {
result.Text = "";
//随后让文本框归空 }
}
private void opp_Click(object sender, EventArgs e) {
//temp = 6;
try {
result.Text = (-double.Parse(result.Text)).ToString();
}
catch (Exception) {
MessageBox.Show("还没输入数字呢", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
finally {
temp = 0;
}
}
private void Form1_Load(object sender, EventArgs e) {
result.Text = "0";
}
private void result_TextChanged(object sender, EventArgs e) {
if (result.Text.Length > 18&& result.Text.Length<36) {
result.Font = new Font(result.Font.FontFamily, 15, result.Font.Style);
}
if (result.Text.Length > 36&&result.Text.Length<45) {
result.Font = new Font(result.Font.FontFamily, 10, result.Font.Style);
}
if (result.Text.Length > 45) {
MessageBox.Show("超出范围，将要清空了！", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
result.ResetText();
result.Font = new Font(result.Font.FontFamily, 20, result.Font.Style);
}
}
}
}