C#小作业
Designer.cs
1 namespace _2_1 2 { 3 partial class Form1 4 { 5 /// <summary> 6 /// 必需的设计器变量。 7 /// </summary> 8 private System.ComponentModel.IContainer components = null; 9 10 /// <summary> 11 /// 清理所有正在使用的资源。 12 /// </summary> 13 /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> 14 protected override void Dispose(bool disposing) 15 { 16 if (disposing && (components != null)) 17 { 18 components.Dispose(); 19 } 20 base.Dispose(disposing); 21 } 22 23 #region Windows 窗体设计器生成的代码 24 25 /// <summary> 26 /// 设计器支持所需的方法 - 不要修改 27 /// 使用代码编辑器修改此方法的内容。 28 /// </summary> 29 private void InitializeComponent() 30 { 31 this.Num = new System.Windows.Forms.Label(); 32 this.txt = new System.Windows.Forms.TextBox(); 33 this.button1 = new System.Windows.Forms.Button(); 34 this.button2 = new System.Windows.Forms.Button(); 35 this.button3 = new System.Windows.Forms.Button(); 36 this.button4 = new System.Windows.Forms.Button(); 37 this.button5 = new System.Windows.Forms.Button(); 38 this.button6 = new System.Windows.Forms.Button(); 39 this.button7 = new System.Windows.Forms.Button(); 40 this.button8 = new System.Windows.Forms.Button(); 41 this.button9 = new System.Windows.Forms.Button(); 42 this.button10 = new System.Windows.Forms.Button(); 43 this.button11 = new System.Windows.Forms.Button(); 44 this.button13 = new System.Windows.Forms.Button(); 45 this.button14 = new System.Windows.Forms.Button(); 46 this.button15 = new System.Windows.Forms.Button(); 47 this.button16 = new System.Windows.Forms.Button(); 48 this.button12 = new System.Windows.Forms.Button(); 49 this.SuspendLayout(); 50 // 51 // Num 52 // 53 this.Num.AutoSize = true; 54 this.Num.Location = new System.Drawing.Point(33, 29); 55 this.Num.Name = "Num"; 56 this.Num.Size = new System.Drawing.Size(17, 18); 57 this.Num.TabIndex = 0; 58 this.Num.Text = " "; 59 // 60 // txt 61 // 62 this.txt.Location = new System.Drawing.Point(36, 64); 63 this.txt.Name = "txt"; 64 this.txt.Size = new System.Drawing.Size(381, 28); 65 this.txt.TabIndex = 1; 66 // 67 // button1 68 // 69 this.button1.Location = new System.Drawing.Point(36, 134); 70 this.button1.Name = "button1"; 71 this.button1.Size = new System.Drawing.Size(59, 44); 72 this.button1.TabIndex = 2; 73 this.button1.Text = "1"; 74 this.button1.UseVisualStyleBackColor = true; 75 this.button1.Click += new System.EventHandler(this.button1_Click); 76 // 77 // button2 78 // 79 this.button2.Location = new System.Drawing.Point(139, 134); 80 this.button2.Name = "button2"; 81 this.button2.Size = new System.Drawing.Size(59, 44); 82 this.button2.TabIndex = 3; 83 this.button2.Text = "2"; 84 this.button2.UseVisualStyleBackColor = true; 85 this.button2.Click += new System.EventHandler(this.button1_Click); 86 // 87 // button3 88 // 89 this.button3.Location = new System.Drawing.Point(247, 134); 90 this.button3.Name = "button3"; 91 this.button3.Size = new System.Drawing.Size(59, 44); 92 this.button3.TabIndex = 4; 93 this.button3.Text = "3"; 94 this.button3.UseVisualStyleBackColor = true; 95 this.button3.Click += new System.EventHandler(this.button1_Click); 96 // 97 // button4 98 // 99 this.button4.Location = new System.Drawing.Point(36, 213); 100 this.button4.Name = "button4"; 101 this.button4.Size = new System.Drawing.Size(59, 44); 102 this.button4.TabIndex = 5; 103 this.button4.Text = "4"; 104 this.button4.UseVisualStyleBackColor = true; 105 this.button4.Click += new System.EventHandler(this.button1_Click); 106 // 107 // button5 108 // 109 this.button5.Location = new System.Drawing.Point(139, 213); 110 this.button5.Name = "button5"; 111 this.button5.Size = new System.Drawing.Size(59, 44); 112 this.button5.TabIndex = 6; 113 this.button5.Text = "5"; 114 this.button5.UseVisualStyleBackColor = true; 115 this.button5.Click += new System.EventHandler(this.button1_Click); 116 // 117 // button6 118 // 119 this.button6.Location = new System.Drawing.Point(247, 213); 120 this.button6.Name = "button6"; 121 this.button6.Size = new System.Drawing.Size(59, 44); 122 this.button6.TabIndex = 7; 123 this.button6.Text = "6"; 124 this.button6.UseVisualStyleBackColor = true; 125 this.button6.Click += new System.EventHandler(this.button1_Click); 126 // 127 // button7 128 // 129 this.button7.Location = new System.Drawing.Point(36, 297); 130 this.button7.Name = "button7"; 131 this.button7.Size = new System.Drawing.Size(59, 44); 132 this.button7.TabIndex = 8; 133 this.button7.Text = "7"; 134 this.button7.UseVisualStyleBackColor = true; 135 this.button7.Click += new System.EventHandler(this.button1_Click); 136 // 137 // button8 138 // 139 this.button8.Location = new System.Drawing.Point(139, 297); 140 this.button8.Name = "button8"; 141 this.button8.Size = new System.Drawing.Size(59, 44); 142 this.button8.TabIndex = 9; 143 this.button8.Text = "8"; 144 this.button8.UseVisualStyleBackColor = true; 145 this.button8.Click += new System.EventHandler(this.button1_Click); 146 // 147 // button9 148 // 149 this.button9.Location = new System.Drawing.Point(247, 297); 150 this.button9.Name = "button9"; 151 this.button9.Size = new System.Drawing.Size(59, 44); 152 this.button9.TabIndex = 10; 153 this.button9.Text = "9"; 154 this.button9.UseVisualStyleBackColor = true; 155 this.button9.Click += new System.EventHandler(this.button1_Click); 156 // 157 // button10 158 // 159 this.button10.Location = new System.Drawing.Point(36, 380); 160 this.button10.Name = "button10"; 161 this.button10.Size = new System.Drawing.Size(59, 44); 162 this.button10.TabIndex = 11; 163 this.button10.Text = "0"; 164 this.button10.UseVisualStyleBackColor = true; 165 this.button10.Click += new System.EventHandler(this.button1_Click); 166 // 167 // button11 168 // 169 this.button11.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); 170 this.button11.Location = new System.Drawing.Point(139, 380); 171 this.button11.Name = "button11"; 172 this.button11.Size = new System.Drawing.Size(59, 44); 173 this.button11.TabIndex = 12; 174 this.button11.Text = "."; 175 this.button11.UseVisualStyleBackColor = true; 176 this.button11.Click += new System.EventHandler(this.button1_Click); 177 // 178 // button13 179 // 180 this.button13.Location = new System.Drawing.Point(358, 134); 181 this.button13.Name = "button13"; 182 this.button13.Size = new System.Drawing.Size(59, 44); 183 this.button13.TabIndex = 14; 184 this.button13.Text = "+"; 185 this.button13.UseVisualStyleBackColor = true; 186 this.button13.Click += new System.EventHandler(this.button13_Click); 187 // 188 // button14 189 // 190 this.button14.Location = new System.Drawing.Point(358, 213); 191 this.button14.Name = "button14"; 192 this.button14.Size = new System.Drawing.Size(59, 44); 193 this.button14.TabIndex = 15; 194 this.button14.Text = "-"; 195 this.button14.UseVisualStyleBackColor = true; 196 this.button14.Click += new System.EventHandler(this.button13_Click); 197 // 198 // button15 199 // 200 this.button15.Location = new System.Drawing.Point(358, 297); 201 this.button15.Name = "button15"; 202 this.button15.Size = new System.Drawing.Size(59, 44); 203 this.button15.TabIndex = 16; 204 this.button15.Text = "*"; 205 this.button15.UseVisualStyleBackColor = true; 206 this.button15.Click += new System.EventHandler(this.button13_Click); 207 // 208 // button16 209 // 210 this.button16.Location = new System.Drawing.Point(358, 380); 211 this.button16.Name = "button16"; 212 this.button16.Size = new System.Drawing.Size(59, 44); 213 this.button16.TabIndex = 17; 214 this.button16.Text = "/"; 215 this.button16.UseVisualStyleBackColor = true; 216 this.button16.Click += new System.EventHandler(this.button13_Click); 217 // 218 // button12 219 // 220 this.button12.Location = new System.Drawing.Point(247, 380); 221 this.button12.Name = "button12"; 222 this.button12.Size = new System.Drawing.Size(59, 44); 223 this.button12.TabIndex = 18; 224 this.button12.Text = "="; 225 this.button12.UseVisualStyleBackColor = true; 226 this.button12.Click += new System.EventHandler(this.button12_Click); 227 // 228 // Form1 229 // 230 this.AutoScaleDimensions = new System.Drawing.SizeF(9F, 18F); 231 this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; 232 this.ClientSize = new System.Drawing.Size(456, 475); 233 this.Controls.Add(this.button12); 234 this.Controls.Add(this.button16); 235 this.Controls.Add(this.button15); 236 this.Controls.Add(this.button14); 237 this.Controls.Add(this.button13); 238 this.Controls.Add(this.button11); 239 this.Controls.Add(this.button10); 240 this.Controls.Add(this.button9); 241 this.Controls.Add(this.button8); 242 this.Controls.Add(this.button7); 243 this.Controls.Add(this.button6); 244 this.Controls.Add(this.button5); 245 this.Controls.Add(this.button4); 246 this.Controls.Add(this.button3); 247 this.Controls.Add(this.button2); 248 this.Controls.Add(this.button1); 249 this.Controls.Add(this.txt); 250 this.Controls.Add(this.Num); 251 this.Name = "Form1"; 252 this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; 253 this.Text = "计算器"; 254 this.Load += new System.EventHandler(this.Form1_Load); 255 this.ResumeLayout(false); 256 this.PerformLayout(); 257 258 } 259 260 #endregion 261 262 private System.Windows.Forms.Label Num; 263 private System.Windows.Forms.TextBox txt; 264 private System.Windows.Forms.Button button1; 265 private System.Windows.Forms.Button button2; 266 private System.Windows.Forms.Button button3; 267 private System.Windows.Forms.Button button4; 268 private System.Windows.Forms.Button button5; 269 private System.Windows.Forms.Button button6; 270 private System.Windows.Forms.Button button7; 271 private System.Windows.Forms.Button button8; 272 private System.Windows.Forms.Button button9; 273 private System.Windows.Forms.Button button10; 274 private System.Windows.Forms.Button button11; 275 private System.Windows.Forms.Button button13; 276 private System.Windows.Forms.Button button14; 277 private System.Windows.Forms.Button button15; 278 private System.Windows.Forms.Button button16; 279 private System.Windows.Forms.Button button12; 280 } 281 }
Form1.cs
1 using System; 2 using System.Collections.Generic; 3 using System.ComponentModel; 4 using System.Data; 5 using System.Drawing; 6 using System.Linq; 7 using System.Text; 8 using System.Threading.Tasks; 9 using System.Windows.Forms; 10 11 namespace _2_1 12 { 13 public partial class Form1 : Form 14 { 15 private string save = ""; 16 private double x = 0, y = 0; 17 private Button btn = new Button(); 18 public Form1() 19 { 20 InitializeComponent(); 21 } 22 23 private void Form1_Load(object sender, EventArgs e) 24 { 25 txt.Text = ""; 26 Num.Text = ""; 27 } 28 29 private void button13_Click(object sender, EventArgs e) 30 { 31 btn = (Button)sender; 32 //判断文本框中是否为空，如果为空，那么输出错误信息 33 if (txt.Text == "") MessageBox.Show("错误!", " "); 34 else 35 { 36 //如果运算符不是“=”，那么保存当前运算符，并保留初始值 37 if (txt.Text != "") x = Convert.ToDouble(txt.Text); 38 else MessageBox.Show("错误!将赋值为0", " "); 39 //将txt当前的文本内容放到lable上，txt重置 40 Num.Text = txt.Text; 41 txt.Text = ""; 42 //保留当前运算符 43 save = btn.Text; 44 } 45 } 46 //“=”运算符 47 private void button12_Click(object sender, EventArgs e) 48 { 49 if (txt.Text == "") 50 { 51 MessageBox.Show("错误!", " "); 52 } 53 else 54 { 55 y = Convert.ToDouble(txt.Text); 56 if (save == "+") txt.Text = (x + y).ToString(); 57 else if (save == "-") txt.Text = (x - y).ToString(); 58 else if (save == "*") txt.Text = (x * y).ToString(); 59 else 60 { 61 if (x == 0) 62 { 63 MessageBox.Show("错误,除数不能为零！", ""); 64 } 65 else 66 { 67 txt.Text = (x / y).ToString(); 68 } 69 } 70 MessageBox.Show("结果为" + txt.Text, " "); 71 //全部清零为下次运算做准备 72 txt.Text = ""; 73 Num.Text = ""; 74 } 75 } 76 77 private void button1_Click(object sender, EventArgs e) 78 { 79 //new一个实例，管理数字按钮 80 btn = (Button)sender; 81 //文本框文本为按钮名称加上之前输入的内容 82 txt.Text = txt.Text + btn.Text; 83 } 84 } 85 }