有关科学计算器的方法设计(C#)

这只是一个纯小白的自治计算器,代码可能不是十分简便,希望可以用作参考。

计算器的实现

有关科学计算器的方法设计(C#)有关普通计算器和科学计算器的代码如下画图功能的实现如下

有关普通计算器和科学计算器的代码如下

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Text.RegularExpressions; using System.Threading.Tasks; using System.Windows.Forms; namespace WindowsFormsApp3 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } string operation = null; double number1 = 0, number2 = 0; private void textpush(string x) //普通计算器的1,2,,3等等的输入函数 { if (textBox1.Text == "0") { textBox1.Text = ""; } textBox1.Text += x; } private void textpush_1(string x) //科学计算器的1,2,3等的输入函数 { if (textBox2.Text == "0") { textBox2.Text = ""; } textBox2.Text += x; textBox3.Text += x; } #region General calculator private void button34_Click(object sender, EventArgs e) { textpush("0"); } private void button24_Click(object sender, EventArgs e) { textpush("1"); } private void button35_Click(object sender, EventArgs e) { textpush("2"); } private void button40_Click(object sender, EventArgs e) { textpush("3"); } private void button31_Click(object sender, EventArgs e) { textpush("4"); } private void button36_Click(object sender, EventArgs e) { textpush("5"); } private void button41_Click(object sender, EventArgs e) { textpush("6"); } private void button32_Click(object sender, EventArgs e) { textpush("7"); } private void button37_Click(object sender, EventArgs e) { textpush("8"); } private void button42_Click(object sender, EventArgs e) { textpush("9"); } private void button23_Click(object sender, EventArgs e) //普通计算器正负号的运算 { if (textBox1.Text == "") textBox1.Text += ""; else { if (operation != null) button49_Click(sender, e); textBox1.Text = (-1 * Convert.ToDouble(textBox1.Text)).ToString(); } } private void button39_Click(object sender, EventArgs e) //普通计算器小数点的问题 { if (textBox1.Text == "") { textBox1.Text += "0."; } else if (textBox1.Text.IndexOf(".") > 0) { textBox1.Text += ""; } else { textBox1.Text += "."; } } private void button47_Click(object sender, EventArgs e) //普通计算器"+"运算 { if (operation != null) button49_Click(sender, e); if (textBox1.Text == "") textBox1.Text = "0"; number1 = Convert.ToDouble(textBox1.Text); operation = "+"; textBox1.Text = ""; } private void button46_Click(object sender, EventArgs e) //普通计算器的"-"运算 { if (operation != null) button49_Click(sender, e); if (textBox1.Text == "") textBox1.Text = "0"; number1 = Convert.ToDouble(textBox1.Text); operation = "-"; textBox1.Text = ""; } private void button45_Click(object sender, EventArgs e) //普通计算器的"*"运算 { if (operation != null) button49_Click(sender, e); if (textBox1.Text == "") textBox1.Text = "0"; number1 = Convert.ToDouble(textBox1.Text); operation = "*"; textBox1.Text = ""; } private void button44_Click(object sender, EventArgs e) //普通计算器的"/"运算 { if (operation != null) button49_Click(sender, e); if (textBox1.Text == "") textBox1.Text = "0"; number1 = Convert.ToDouble(textBox1.Text); operation = "/"; textBox1.Text = ""; } private void button53_Click(object sender, EventArgs e) //普通计算器的退格处理 { if (textBox1.Text.Length > 0) { textBox1.Text = textBox1.Text.Substring(0, textBox1.Text.Length - 1); } else { textBox1.Text = ""; } } private void button52_Click(object sender, EventArgs e) //普通计算器的清零处理 { textBox1.Text = ""; number1 = 0; number2 = 0; operation = null; } private void button49_Click(object sender, EventArgs e) //普通计算器的清理处理 { if (textBox1.Text != "") { number2 = Convert.ToDouble(textBox1.Text); switch (operation) { case "+": textBox1.Text = (number1 + number2).ToString(); break; case "-": textBox1.Text = (number1 - number2).ToString(); break; case "*": textBox1.Text = (number1 * number2).ToString(); break; case "/": { if (number2 == 0) MessageBox.Show("0 不能作为除数", "WRONG!!"); else textBox1.Text = (number1 / number2).ToString(); break; } } number1 = Convert.ToDouble(textBox1.Text); operation = null; } } private void button48_Click(object sender, EventArgs e) //普通计算器的平方根处理 { if (operation != null) button49_Click(sender, e); if (textBox1.Text != "") { if (Convert.ToDouble(textBox1.Text) < 0) MessageBox.Show(" 小于0的数无法进行平方根运算.", "WRONG!!!"); else { textBox1.Text = (Math.Round(Math.Sqrt(Convert.ToDouble(textBox1.Text)), 10)).ToString(); } } } private void button43_Click(object sender, EventArgs e) //普通计算器的log运算 { if (operation != null) button49_Click(sender, e); if (textBox1.Text != "") { if (Convert.ToDouble(textBox1.Text) <= 0) MessageBox.Show("真数必须大于0", "WRONG!!!"); else { textBox1.Text = (Math.Round(Math.Log10(Convert.ToDouble(textBox1.Text)), 10)).ToString(); } } } private void button38_Click(object sender, EventArgs e) //普通计算器的平方运算 { if (operation != null) button49_Click(sender, e); if (textBox1.Text != "") { textBox1.Text = (Convert.ToDouble(textBox1.Text) * Convert.ToDouble(textBox1.Text)).ToString(); } } private void button33_Click(object sender, EventArgs e) //普通计算器的倒数运算 { if (operation != null) button49_Click(sender, e); if (textBox1.Text != "") { if (textBox1.Text == "0") MessageBox.Show("0不能作为除数", "WRONG!!!"); else { textBox1.Text = (Math.Round(1 / (Convert.ToDouble(textBox1.Text)), 10)).ToString(); } } } #endregion #region Science calculator private void button4_Click(object sender, EventArgs e) { textpush_1("1"); } private void button9_Click(object sender, EventArgs e) { textpush_1("2"); } private void button14_Click(object sender, EventArgs e) { textpush_1("3"); } private void button3_Click(object sender, EventArgs e) { textpush_1("4"); } private void button8_Click(object sender, EventArgs e) { textpush_1("5"); } private void button13_Click(object sender, EventArgs e) { textpush_1("6"); } private void button2_Click(object sender, EventArgs e) { textpush_1("7"); } private void button7_Click(object sender, EventArgs e) { textpush_1("8"); } private void button12_Click(object sender, EventArgs e) { textpush_1("9"); } private void button10_Click(object sender, EventArgs e) { textpush_1("0"); } private void button15_Click(object sender, EventArgs e) { if (textBox3.Text == "") { textBox2.Text += "0."; textBox3.Text += "0."; } else if (textBox3.Text.IndexOf(".") > 0) { textBox2.Text += ""; textBox3.Text += ""; } else { textBox2.Text += "."; textBox3.Text += "."; } } private void button17_Click(object sender, EventArgs e) { textBox2.Text += "+"; textBox3.Text = ""; } private void button18_Click(object sender, EventArgs e) { textBox2.Text += "-"; textBox3.Text = ""; } private void button19_Click(object sender, EventArgs e) { textBox2.Text += "*"; textBox3.Text = ""; } private void button20_Click(object sender, EventArgs e) { textBox2.Text += "/"; textBox3.Text = ""; } private void button29_Click(object sender, EventArgs e) { textBox2.Text += "("; textBox3.Text = ""; } private void button50_Click(object sender, EventArgs e) { textBox2.Text += ")"; textBox3.Text = ""; } private void button1_Click(object sender, EventArgs e) //科学计算器的倒数运算 { if (textBox3.Text == "") textBox2.Text += ""; else if (textBox2.Text == textBox3.Text) { if (textBox3.Text == "0") MessageBox.Show("0不能作为除数", "WRONG!!!"); else { textBox3.Text = (Math.Round(1 / (Convert.ToDouble(textBox3.Text)), 10)).ToString(); textBox2.Text = textBox3.Text; } } else { if (textBox3.Text == "0") MessageBox.Show("0不能作为除数", "WRONG!!!"); else { textBox2.Text = textBox2.Text.Substring(0, textBox2.Text.Length - textBox3.Text.Length); textBox3.Text = (Math.Round(1 / (Convert.ToDouble(textBox3.Text)), 10)).ToString(); textBox2.Text += textBox3.Text; } } } private void button5_Click(object sender, EventArgs e) //变号操作 { if (textBox3.Text == "") textBox2.Text+=""; else if (textBox2.Text == textBox3.Text) { textBox3.Text = (-1 * Convert.ToDouble(textBox3.Text)).ToString(); textBox2.Text = textBox3.Text; } else { textBox2.Text = textBox2.Text.Substring(0, textBox2.Text.Length - textBox3.Text.Length ); textBox3.Text = (-1 * Convert.ToDouble(textBox3.Text)).ToString(); textBox2.Text += textBox3.Text; } } private void button21_Click(object sender, EventArgs e) //退格操作 { if (textBox3.Text.Length > 0) { textBox3.Text = textBox3.Text.Substring(0, textBox3.Text.Length - 1); textBox2.Text=textBox2.Text.Substring(0, textBox2.Text.Length - 1); } else { textBox3.Text = ""; if(textBox2.Text.Length > 0) { textBox2.Text = textBox2.Text.Substring(0, textBox2.Text.Length - 1); } else textBox2.Text = ""; } } private void button22_Click(object sender, EventArgs e) //清空操作 { textBox2.Text = ""; textBox3.Text = ""; } private void button6_Click(object sender, EventArgs e) //平方函数 { if (textBox3.Text == "") textBox2.Text += ""; else if (textBox2.Text == textBox3.Text) { textBox3.Text = (Convert.ToDouble(textBox3.Text) * Convert.ToDouble(textBox3.Text)).ToString(); textBox2.Text = textBox3.Text; } else { textBox2.Text = textBox2.Text.Substring(0, textBox2.Text.Length - textBox3.Text.Length); textBox3.Text = (Convert.ToDouble(textBox3.Text) * Convert.ToDouble(textBox3.Text)).ToString(); textBox2.Text += textBox3.Text; } } private void button11_Click(object sender, EventArgs e) //logx函数 { if (textBox3.Text == "") textBox2.Text += ""; else if (textBox2.Text == textBox3.Text) { if (Convert.ToDouble(textBox3.Text) <= 0) MessageBox.Show("真数必须大于0", "WRONG!!!"); else { textBox3.Text = (Math.Round(Math.Log10(Convert.ToDouble(textBox3.Text)), 10)).ToString(); textBox2.Text = textBox3.Text; } } else { if (Convert.ToDouble(textBox3.Text) <= 0) MessageBox.Show("真数必须大于0", "WRONG!!!"); else { textBox2.Text = textBox2.Text.Substring(0, textBox2.Text.Length - textBox3.Text.Length); textBox3.Text = (Math.Round(Math.Log10(Convert.ToDouble(textBox3.Text)), 10)).ToString(); textBox2.Text += textBox3.Text; } } } private void button16_Click(object sender, EventArgs e) //平方根函数 { if (textBox3.Text == "") textBox2.Text += ""; else if (textBox2.Text == textBox3.Text) { if (Convert.ToDouble(textBox3.Text) < 0) MessageBox.Show(" 小于0的数无法进行平方根运算.", "WRONG!!!"); else { textBox3.Text = Math.Round(Math.Sqrt(Convert.ToDouble(textBox3.Text)), 10).ToString(); textBox2.Text = textBox3.Text; } } else { if (Convert.ToDouble(textBox3.Text) < 0) MessageBox.Show(" 小于0的数无法进行平方根运算.", "WRONG!!!"); else { textBox2.Text = textBox2.Text.Substring(0, textBox2.Text.Length - textBox3.Text.Length); textBox3.Text = Math.Round(Math.Sqrt(Convert.ToDouble(textBox3.Text)), 10).ToString(); textBox2.Text += textBox3.Text; } } } private void button26_Click(object sender, EventArgs e) //sin函数 { if (textBox3.Text == "") textBox2.Text += ""; else if (textBox2.Text == textBox3.Text) { textBox3.Text = Math.Round(Math.Sin(Convert.ToDouble(textBox3.Text)),10).ToString(); textBox2.Text = textBox3.Text; } else { textBox2.Text = textBox2.Text.Substring(0, textBox2.Text.Length - textBox3.Text.Length); textBox3.Text = Math.Round(Math.Sin(Convert.ToDouble(textBox3.Text)), 10).ToString(); textBox2.Text += textBox3.Text; } } private void button27_Click(object sender, EventArgs e) //cos函数 { if (textBox3.Text == "") textBox2.Text += ""; else if (textBox2.Text == textBox3.Text) { textBox3.Text = Math.Round(Math.Cos(Convert.ToDouble(textBox3.Text)), 10).ToString(); textBox2.Text = textBox3.Text; } else { textBox2.Text = textBox2.Text.Substring(0, textBox2.Text.Length - textBox3.Text.Length); textBox3.Text = Math.Round(Math.Cos(Convert.ToDouble(textBox3.Text)), 10).ToString(); textBox2.Text += textBox3.Text; } } private void button28_Click(object sender, EventArgs e) //tan函数 { if (textBox3.Text == "") textBox2.Text += ""; else if (textBox2.Text == textBox3.Text) { textBox3.Text = Math.Round(Math.Tan(Convert.ToDouble(textBox3.Text)), 10).ToString(); textBox2.Text = textBox3.Text; } else { textBox2.Text = textBox2.Text.Substring(0, textBox2.Text.Length - textBox3.Text.Length); textBox3.Text = Math.Round(Math.Tan(Convert.ToDouble(textBox3.Text)), 10).ToString(); textBox2.Text += textBox3.Text; } } private void button25_Click(object sender, EventArgs e) { string expression_1 = textBox2.Text; juge(expression_1); expression_1 = textBox2.Text; string expression_2 = test_turn(expression_1); string number = getnumber(expression_2); textBox3.Text = number; } private void juge(string expression_1) //判断是否有不符合常规的表达式的判断 { if (expression_1[0] == '+' || expression_1[0] == '-' || expression_1[0] == '*' || expression_1[0] == '/' || expression_1[0] == '.') textBox2.Text = "0" + textBox2.Text; } private double getvalue(char op, double ch1, double ch2) //运算符执行的步骤 { switch (op) { case '+': return ch2 + ch1; case '-': return ch2 - ch1; case '*': return ch2 * ch1; case '/': return ch2 / ch1; default: return 0; } } private string getnumber(string test_2) //表达式的计算 { Stack<string> stacks = new Stack<string>(); Stack<string> num = stacks; double non1, non2, ret; string number = null; for (int i = 0; i < test_2.Length; i++) { if (test_2[i] != '+' && test_2[i] != '-' && test_2[i] != '*' && test_2[i] != '/') { if (test_2[i] == '#') { Console.WriteLine(number); num.Push(number); number = null; continue; } number += test_2[i]; } else { non1 = Convert.ToDouble(num.Pop()); non2 = Convert.ToDouble(num.Pop()); ret = getvalue(test_2[i], non1, non2); num.Push(ret.ToString()); } } return num.Pop(); } private string test_turn(string test_1) //转后缀表达式的函数 { string test_2 = null; Stack<char> stacks = new Stack<char>(); Stack<char> operation = stacks; Console.WriteLine(test_1); for (int i = 0; i < test_1.Length; i++) { if (test_1[i] != '+' && test_1[i] != '-' && test_1[i] != '*' && test_1[i] != '/' && test_1[i] != '(' && test_1[i] != ')') { test_2 += test_1[i]; if (i == test_1.Length - 1) test_2 += "#"; if (i < test_1.Length - 1) if (test_1[i + 1] == '+' || test_1[i + 1] == '-' || test_1[i + 1] == '*' || test_1[i + 1] == '/' || test_1[i + 1] == '(' || test_1[i + 1] == ')') test_2 += "#"; } else { switch (test_1[i]) { case ')': while (operation.Count > 0) { if (operation.Peek() == '(') break; test_2 += operation.Pop(); } operation.Pop(); break; case '(': operation.Push(test_1[i]); break; case '+': case '-': case '*': case '/': while (operation.Count > 0) { if (test_number(test_1[i]) <= test_number(operation.Peek())) { test_2 += operation.Pop(); } else { break; } } operation.Push(test_1[i]); break; } } } while (operation.Count > 0) test_2 += operation.Pop(); Console.WriteLine(test_2); return test_2; } private int test_number(char a) //符号优先级判断 { switch (a) { case '+': return 1; case '-': return 1; case '*': return 2; case '/': return 2; default: return 0; } } private void button30_Click(object sender, EventArgs e) //启动画图功能 { Form2 form2 = new Form2(); form2.ShowDialog(); } private void Form1_KeyDown(object sender, KeyEventArgs e) //实现按键输入 { switch (e.KeyCode) { case Keys.NumPad1: this.button4_Click(null, null); button25.Focus(); break; case Keys.NumPad2: this.button9_Click(null, null); button25.Focus(); break; case Keys.NumPad3: this.button14_Click(null, null); button25.Focus(); break; case Keys.NumPad4: this.button3_Click(null, null); button25.Focus(); break; case Keys.NumPad5: this.button8_Click(null, null); button25.Focus(); break; case Keys.NumPad6: this.button13_Click(null, null); button25.Focus(); break; case Keys.NumPad7: this.button2_Click(null, null); button25.Focus(); break; case Keys.NumPad8: this.button7_Click(null, null); button25.Focus(); break; case Keys.NumPad9: this.button12_Click(null, null); button25.Focus(); break; case Keys.NumPad0: this.button10_Click(null, null); button25.Focus(); break; case Keys.Add: this.button17_Click(null, null); button25.Focus(); break; case Keys.Multiply: this.button19_Click(null, null); button25.Focus(); break; case Keys.Subtract: this.button18_Click(null, null); button25.Focus(); break; case Keys.Divide: this.button20_Click(null, null); button25.Focus(); break; case Keys.Back: this.button21_Click(null, null); button25.Focus(); break; case Keys.Escape: this.button22_Click(null, null); button25.Focus(); break; case Keys.Decimal: this.button15_Click(null, null); button25.Focus(); break; case Keys.D9: this.button29_Click(null, null); button25.Focus(); break; case Keys.D0: this.button50_Click(null, null); button25.Focus(); break; default: break; } } #endregion } }

画图功能的实现如下

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 WindowsFormsApp3 { public partial class Form2 : Form { public Form2() { InitializeComponent(); } int i=1; int x1 = 0; int y1 = 0; int number = 0; double[] y2=new double[2000]; int[] x2 = new int[2000]; private void button1_Click(object sender, EventArgs e) //绘图button { Form2_Paint(sender, null); pictureBox1_Paint(sender, null); } private void button2_Click(object sender, EventArgs e) //sin函数 { if(textBox1.Text=="") textBox1.Text += "sin(x)"; else textBox1.Text += "+sin(x)"; if (x1 != -628) x1 -= 628; y1 += -Convert.ToInt32(Math.Sin(0 / 100) * 100 ); for (; i < 1500; i++) y2[i]+= - Math.Sin(i / 100.0) * 100; i = 1; } private void button3_Click(object sender, EventArgs e) //cos函数 { if (textBox1.Text == "") textBox1.Text += "cos(x)"; else textBox1.Text += "+cos(x)"; if (x1 != -628) x1 -= 628; y1 += -Convert.ToInt32(Math.Cos(0 / 100) * 100); for (; i < 1500; i++) y2[i] += -Math.Cos(i / 100.0) * 100; i = 1; } private void button6_Click(object sender, EventArgs e) //tan函数 { if (textBox1.Text == "") textBox1.Text += "tan(x)"; else textBox1.Text += "+tan(x)"; if(x1!=-628) x1 -= 628; y1 += -Convert.ToInt32(Math.Tan(0 / 100) * 100); for (; i < 1500; i++) y2[i] += -Math.Tan(i / 100.0) * 100; i = 1; } private void button7_Click(object sender, EventArgs e) //清空按钮 { pictureBox1.Image = null; textBox1.Text = null; for (int j = 1; j < 1500; j++) y2[j] = 0; y1 = 0; x1 = 0; number = 0; n = 1; m = 1; } private void button5_Click(object sender, EventArgs e) //logx函数 { if (textBox1.Text == "") textBox1.Text += "log(x)"; else textBox1.Text += "+log(x)"; if (x1 == -628) x1 += 628; y1 += -Convert.ToInt32(Math.Log10(1) * 70)+150; for (; i < 1500; i++) y2[i] += -Math.Log10(i / 1.0) * 70+150; i = 1; } private void button4_Click(object sender, EventArgs e) //lnx函数 { if (textBox1.Text == "") textBox1.Text += "ln(x)"; else textBox1.Text += "+ln(x)"; if (x1 == -628) x1 += 628; y1 += -Convert.ToInt32(Math.Log( 1) * 70)+150; for (; i < 1500; i++) y2[i] += -Math.Log(i / 1.0) * 70+150; i = 1; } private void button8_Click(object sender, EventArgs e) //x的幂次函数 { number = 0; number = (int)numericUpDown1.Value; if (textBox1.Text == "") textBox1.Text += "x^"+number.ToString(); else textBox1.Text += "+x^" + number.ToString(); if (x1 != -628) x1 -= 628; y1 += Convert.ToInt32(Math.Pow(0,number)); if(number>1) for (i=0; i < 1500; i++) y2[i] += -Math.Pow(i-628, number)/100; if(number<=1) for (i = 0; i < 1500; i++) y2[i] += -Math.Pow(i - 628, number); i = 1; } private void pictureBox1_Paint(object sender, PaintEventArgs e) { Graphics g; g = this.pictureBox1.CreateGraphics(); Point begin = new Point(); Point end = new Point(); Pen pn_1 = new Pen(Color.Blue); begin.X = x1 + pictureBox1.Width / 2; //起点 begin.Y = y1 + pictureBox1.Height / 2; for (; i < 1500; i++) { end.X = x1 + i + pictureBox1.Width / 2; end.Y = Convert.ToInt32(y2[i]) + pictureBox1.Height / 2; g.DrawLine(pn_1, begin, end); begin = end; } i = 1; picture_line(); picture_line3(); } private void picture_line(int n=1) //x轴标尺(放大) { Graphics g; g = this.pictureBox1.CreateGraphics(); Point line_1 = new Point(); Point line_2 = new Point(); line_1.Y = pictureBox1.Height / 2; line_2.Y = pictureBox1.Height / 2 - 10; line_1.X = 0; line_2.X = 0; Pen pn_2 = new Pen(Color.Black); for (; i < 1500; i++) { g.DrawLine(pn_2, line_1, line_2); line_1.X += 10*n; line_2.X += 10*n; } i = 1; } private void picture_line1(int n = 1) //x轴标尺(缩小) { Graphics g; g = this.pictureBox1.CreateGraphics(); Point line_1 = new Point(); Point line_2 = new Point(); line_1.Y = pictureBox1.Height / 2; line_2.Y = pictureBox1.Height / 2 - 10; line_1.X = 0; line_2.X = 0; Pen pn_2 = new Pen(Color.Black); for (; i < 1500; i++) { g.DrawLine(pn_2, line_1, line_2); line_1.X += 10 / n; line_2.X += 10 / n; } i = 1; } private void picture_line3(int n = 1) //y轴标尺(放大) { Graphics g; g = this.pictureBox1.CreateGraphics(); Point line_1 = new Point(); Point line_2 = new Point(); line_1.Y = 0; line_2.Y = 0; line_1.X = pictureBox1.Width/2; line_2.X = pictureBox1.Width / 2+10; Pen pn_2 = new Pen(Color.Black); for (; i < 1500; i++) { g.DrawLine(pn_2, line_1, line_2); line_1.Y += 10 * n; line_2.Y += 10 * n; } i = 1; } private void picture_line4(int m = 1) //y轴标尺(缩小) { Graphics g; g = this.pictureBox1.CreateGraphics(); Point line_1 = new Point(); Point line_2 = new Point(); line_1.Y = 0; line_2.Y = 0; line_1.X = pictureBox1.Width / 2; line_2.X = pictureBox1.Width / 2 + 10; Pen pn_2 = new Pen(Color.Black); for (; i < 1500; i++) { g.DrawLine(pn_2, line_1, line_2); line_1.Y += 10 / m; line_2.Y += 10 / m; } i = 1; } private void Form2_Paint(object sender, PaintEventArgs e) //画坐标轴 { Graphics g; g = this.pictureBox1.CreateGraphics(); Point axis_1 = new Point(); Point axis_2 = new Point(); Point axis_3 = new Point(); Point axis_4 = new Point(); Pen pn_2 = new Pen(Color.Black); axis_1.X = pictureBox1.Width; //x 轴右端点 axis_1.Y = pictureBox1.Height / 2; axis_2.X = 0; //x 轴左端点 axis_2.Y = pictureBox1.Height / 2; axis_3.X = pictureBox1.Width / 2; //y 轴上端点 axis_3.Y = 0; axis_4.X = pictureBox1.Width / 2; //y 轴下端点 axis_4.Y = pictureBox1.Height; g.DrawLine(pn_2, axis_2, axis_1); g.DrawLine(pn_2, axis_3, axis_4); } private void Form2_Load(object sender, EventArgs e) //判断鼠标滑轮 { this.MouseWheel += pictureBox1_MouseWheel; } private void pictureBox11_Paint(object sender, PaintEventArgs e) //放大函数功能 { Graphics g; g = this.pictureBox1.CreateGraphics(); PointF begin = new Point(); PointF end = new Point(); Pen pn_1 = new Pen(Color.Blue); begin.X = (x1 )*n + pictureBox1.Width / 2; //起点 begin.Y = (y1 )*n + pictureBox1.Height / 2; for (; i < 1500; i++) { end.X = (x1 + i )*n + pictureBox1.Width / 2; end.Y = (Convert.ToInt32(y2[i]) )*n + pictureBox1.Height / 2; g.DrawLine(pn_1, begin, end); begin = end; } i = 1; Point axis_1 = new Point(); Point axis_2 = new Point(); Point axis_3 = new Point(); Point axis_4 = new Point(); Pen pn_2 = new Pen(Color.Black); axis_1.X = pictureBox1.Width; //x 轴右端点 axis_1.Y = pictureBox1.Height / 2; axis_2.X = 0; //x 轴左端点 axis_2.Y = pictureBox1.Height / 2; axis_3.X = pictureBox1.Width / 2; //y 轴上端点 axis_3.Y = 0; axis_4.X = pictureBox1.Width / 2; //y 轴下端点 axis_4.Y = pictureBox1.Height; g.DrawLine(pn_2, axis_2, axis_1); g.DrawLine(pn_2, axis_3, axis_4); } private void pictureBox12_Paint(object sender, PaintEventArgs e) //缩小函数图像功能 { Graphics g; g = this.pictureBox1.CreateGraphics(); PointF begin = new Point(); PointF end = new Point(); Pen pn_1 = new Pen(Color.Blue); begin.X = (x1 ) / m + pictureBox1.Width / 2; //起点 begin.Y = (y1 ) / m + pictureBox1.Height / 2; for (; i < 1500; i++) { end.X = (x1 + i ) / m + pictureBox1.Width / 2; end.Y = (Convert.ToInt32(y2[i]) ) / m + pictureBox1.Height / 2; g.DrawLine(pn_1, begin, end); begin = end; } i = 1; Point axis_1 = new Point(); Point axis_2 = new Point(); Point axis_3 = new Point(); Point axis_4 = new Point(); Pen pn_2 = new Pen(Color.Black); axis_1.X = pictureBox1.Width; //x 轴右端点 axis_1.Y = pictureBox1.Height / 2; axis_2.X = 0; //x 轴左端点 axis_2.Y = pictureBox1.Height / 2; axis_3.X = pictureBox1.Width / 2; //y 轴上端点 axis_3.Y = 0; axis_4.X = pictureBox1.Width / 2; //y 轴下端点 axis_4.Y = pictureBox1.Height; g.DrawLine(pn_2, axis_2, axis_1); g.DrawLine(pn_2, axis_3, axis_4); } int n = 1; int m = 1; private void pictureBox1_MouseWheel(object sender, MouseEventArgs e) //滑轮上下滑动执行的操作 { if(e.Delta>0) { n++; Refresh(); picture_line(n); picture_line3(n); pictureBox11_Paint(sender, null); } else { m++; Refresh(); picture_line1(m); picture_line4(m); pictureBox12_Paint(sender, null); } } } }