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在用C#学习的时候，师父让我先试着写一个计算器，就像任何电脑都自带的那种，想起来是觉得小case，但是实际上操作起来还是发现了不少问题的。下面的代码就是目前实现的情况，相关变量的意义也都有说明，在次就不再赘述。目前的想法是解决剩下的几个问题，后期再考虑一下优化的问题。
祭出源码：
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 计算器 12 { 13 public partial class Form1 : Form 14 { 15 static double a = 0;//显示器变量 16 static double b = 0;//存储值变量 17 static int p = 0;//判断当前为整数还是小数 18 static int l = 1;//小数位 19 static int y = 1;//qingkongwei 20 static double q = 0;//小数位的单位值 21 static double x = 0; 22 char s=‘+‘;//运算符 23 24 class array_calc 25 { 26 public double shuru(int m, int n) 27 { 28 if (y == 0) 29 { 30 a = 0; 31 if (n != 0) 32 { 33 a = a * 10 + m; 34 int count = 0; 35 } 36 else 37 { 38 q = Math.Pow(0.1, l); 39 a = a + (q * m); 40 l++; 41 // MessageBox.Show("‘q是’" + q + ""); 42 } 43 } 44 else 45 if (n != 0) 46 { 47 a = a * 10 + m; 48 int count = 0; 49 } 50 else 51 { 52 q = Math.Pow(0.1, l); 53 a = a + (q * m); 54 l++; 55 // MessageBox.Show("‘q是’" + q + ""); 56 }; 57 y = 1; 58 return a; 59 60 } 61 public char fuhao(char s) 62 { 63 b = a; 64 a = 0; 65 p = 0; 66 l = 1; 67 // MessageBox.Show("‘b是’" + b + ""); 68 return s; 69 } 70 71 } 72 public Form1() 73 { 74 InitializeComponent(); 75 } 76 77 private void button12_Click(object sender, EventArgs e) 78 { 79 a = 0; 80 textBox1.Text = "0"; 81 b = 0; 82 p = 0; 83 l = 1; 84 85 } 86 87 private void toolTip1_Popup(object sender, PopupEventArgs e) 88 { 89 90 } 91 92 private void numericUpDown1_ValueChanged(object sender, EventArgs e) 93 { 94 95 } 96 97 private void textBox1_TextChanged(object sender, EventArgs e) 98 { 99 100 101 } 102 103 private void label1_Click(object sender, EventArgs e) 104 { 105 106 } 107 108 private void button1_Click(object sender, EventArgs e) 109 { 110 array_calc n1 = new array_calc(); 111 if(p==0) 112 textBox1.Text="" + n1.shuru(1, 1) + " "; 113 else 114 textBox1.Text = "" + n1.shuru(1, 0) + " "; 115 } 116 117 private void button2_Click(object sender, EventArgs e) 118 { 119 array_calc n2 = new array_calc(); 120 if (p == 0) 121 textBox1.Text = "" + n2.shuru(2, 1) + " "; 122 else 123 textBox1.Text = "" + n2.shuru(2, 0) + " "; 124 } 125 126 private void Form1_Load(object sender, EventArgs e) 127 { 128 129 } 130 131 private void button21_Click(object sender, EventArgs e) 132 { 133 array_calc jia = new array_calc(); 134 135 s = jia.fuhao(‘+‘); 136 textBox2.Text = "+"; 137 } 138 139 private void button17_Click(object sender, EventArgs e) 140 { 141 string result=string.Empty; 142 switch (s) 143 { 144 case ‘+‘: 145 a = b + a; 146 result = "" + a.ToString() + ""; 147 s = ‘0‘; 148 break; 149 case ‘-‘: 150 a = b - a; 151 result = "" + a.ToString() + ""; 152 s = ‘0‘; 153 break; 154 case ‘/‘: 155 if (a == 0) 156 result = "除数不能为0！"; 157 else 158 { 159 a = b / a; 160 result = "" + a.ToString() + ""; 161 } 162 163 s = ‘0‘; 164 break; 165 case ‘*‘: 166 a = b * a; 167 //MessageBox.Show("‘b是’" + b + ""); 168 //MessageBox.Show("‘a是’" + a + ""); 169 result = "" + a.ToString() + ""; 170 171 s = ‘0‘; 172 break; 173 case ‘%‘: 174 a = b % a; 175 result = "" + a.ToString() + ""; 176 break; 177 case ‘0‘: 178 result = "" + a.ToString() + ""; 179 break; 180 default: 181 break; 182 } 183 this.textBox1.Text = result; 184 185 y = 0; 186 //l++; 187 188 //if (a == Math.Ceiling(a)) 189 // p = 0; 190 //else 191 //{ 192 // p = 1; 193 // x = a; 194 // while (x != Math.Ceiling(x)) 195 // { 196 // x = a * 10; 197 // l++; 198 // } 199 200 //} 201 202 203 } 204 205 private void button13_Click(object sender, EventArgs e) 206 { 207 array_calc jan = new array_calc(); 208 209 s = jan.fuhao(‘-‘); 210 textBox2.Text = "-"; 211 } 212 213 private void button14_Click(object sender, EventArgs e) 214 { 215 array_calc ceg = new array_calc(); 216 s = ceg.fuhao(‘*‘); 217 textBox2.Text = "*"; 218 } 219 220 private void button15_Click(object sender, EventArgs e) 221 { 222 array_calc chu = new array_calc(); 223 s = chu.fuhao(‘/‘); 224 textBox2.Text = "/"; 225 } 226 227 private void button3_Click(object sender, EventArgs e) 228 { 229 array_calc n3 = new array_calc(); 230 if (p == 0) 231 textBox1.Text = "" + n3.shuru(3, 1) + " "; 232 else 233 textBox1.Text = "" + n3.shuru(3, 0) + " "; 234 } 235 236 private void button4_Click(object sender, EventArgs e) 237 { 238 array_calc n4 = new array_calc(); 239 if (p == 0) 240 textBox1.Text = "" + n4.shuru(4, 1) + " "; 241 else 242 textBox1.Text = "" + n4.shuru(4, 0) + " "; 243 } 244 245 private void button5_Click(object sender, EventArgs e) 246 { 247 array_calc n5 = new array_calc(); 248 if (p == 0) 249 textBox1.Text = "" + n5.shuru(5, 1) + " "; 250 else 251 textBox1.Text = "" + n5.shuru(5, 0) + " "; 252 } 253 254 private void button6_Click(object sender, EventArgs e) 255 { 256 array_calc n6 = new array_calc(); 257 if (p == 0) 258 textBox1.Text = "" + n6.shuru(6, 1) + " "; 259 else 260 textBox1.Text = "" + n6.shuru(6, 0) + " "; 261 } 262 263 private void button7_Click(object sender, EventArgs e) 264 { 265 array_calc n7 = new array_calc(); 266 if (p == 0) 267 textBox1.Text = "" + n7.shuru(7, 1) + " "; 268 else 269 textBox1.Text = "" + n7.shuru(7, 0) + " "; 270 } 271 272 private void button8_Click(object sender, EventArgs e) 273 { 274 array_calc n8 = new array_calc(); 275 if (p == 0) 276 textBox1.Text = "" + n8.shuru(8, 1) + " "; 277 else 278 textBox1.Text = "" + n8.shuru(8, 0) + " "; 279 } 280 281 private void button9_Click(object sender, EventArgs e) 282 { 283 array_calc n9 = new array_calc(); 284 if (p == 0) 285 textBox1.Text = "" + n9.shuru(9, 1) + " "; 286 else 287 textBox1.Text = "" + n9.shuru(9, 0) + " "; 288 } 289 290 private void button23_Click(object sender, EventArgs e) 291 { 292 array_calc n0 = new array_calc(); 293 if (p == 0) 294 textBox1.Text = "" + n0.shuru(0, 1) + " "; 295 else 296 textBox1.Text = "" + n0.shuru(0, 0) + " "; 297 } 298 299 private void button11_Click(object sender, EventArgs e) 300 { 301 a = 0; 302 b = 0; 303 p = 0; 304 l = 1; 305 textBox1.Text = "0"; 306 textBox2.Text = " "; 307 } 308 309 private void textBox2_TextChanged(object sender, EventArgs e) 310 { 311 312 } 313 314 private void button16_Click(object sender, EventArgs e) 315 { 316 a = 0 - a; 317 textBox1.Text =""+a+""; 318 } 319 320 private void button18_Click(object sender, EventArgs e) 321 { 322 array_calc qyu = new array_calc(); 323 s = qyu.fuhao(‘%‘); 324 textBox2.Text = "%"; 325 y = 0; 326 } 327 328 private void button19_Click(object sender, EventArgs e) 329 { 330 a = Math.Sqrt(a); 331 textBox1.Text = "" + a + ""; 332 textBox2.Text = "√"; 333 y = 0; 334 } 335 336 private void button22_Click(object sender, EventArgs e) 337 { 338 if (a == 0) 339 textBox1.Text = "分母不能为0！"; 340 else 341 { 342 a = 1 / a; 343 textBox1.Text = "" + a + ""; 344 textBox2.Text = "1/X"; 345 } 346 y = 0; 347 348 } 349 350 private void button20_Click(object sender, EventArgs e) 351 { 352 array_calc nn = new array_calc(); 353 p = 1; 354 // textBox1.Text = "" + nn.shuru(1, 0) + " "; 355 } 356 } 357 }
接下来想要解决的问题是：
符号重新输入的问题：例如：1*+1=
C键、栅格键的问题
感觉自己的代码并没有怎么用到类和方法，似乎还是函数的思维。这个思想观点的转变比代码本身还要重要。
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原文地址：http://www.cnblogs.com/uestc-hujun/p/5080802.html
