基于Visual-Studio的建议计算器设计.doc

通信与信息工程学院 it实训报告班 级： 学 号： 姓 名: 谢 松 日期：2014年11月9日计算器实验1、实验名称：简易计算器2、实验内容： 完成计算器功能3、实验结果： 完成基本要求，实现2位整数加减乘除运算，带退位和清除功能。 完成扩展，实现按运算优先级进行任意位数小数加减乘除四则混合运算。 完成亮点，完整显示计算表达式，系统容错率高，可多次退位。代码如下：using system;using system;using system.collections.generic;using system.componentmodel;using system.data;using system.drawing;using system.linq;using system.text;using system.windows.forms;namespace jisuanqi public partial class form1 : form public form1() initializecomponent(); float mainnum = new float10; / 存储第一个数 int symbol = new int10; private int i = 0 ; / private int yusuan_level ; private float result; private bool issecond = false; / 用来判断输入的是第一个还是第二个数 private bool isdone = false; / 用来判断是否按了等于按钮 private bool iskeyupclear = true;/用来判断是否按了clear键,程序开始前默认按了; private bool iskeyupclear_2 = true;/用来判断是否按了clear键,程序开始前默认按了; private bool iscount = false ; /判断是否有计算符号 public void settext(string textest) /设置显示文本框的值 if (textest.equals(clear) textbox1.text = 0; issecond = false; isdone = false; iskeyupclear = true; i = 0; else if (textest.equals() if (this.textbox1.text.length = 1) this.textbox1.text = 0; iskeyupclear = true; else this.textbox1.text = textbox1.text.substring(0, textbox1.text.length -1); else if (iskeyupclear) /对是否按下clear键的判断 textbox1.text = textest; iskeyupclear = false; else textbox1.text += textest; public void settext2(string textest) /设置运算文本框的值 if (textest.equals(clear) textbox2.text = 0; issecond = false; iskeyupclear_2 = true; i = 0; else if (textest.equals() if (this.textbox2.text.length = 1) this.textbox2.text = 0; iskeyupclear_2 = true; else if (iscount) i-; iscount = false; else this.textbox2.text = textbox2.text.substring(0, textbox2.text.length - 1); else if (iscount) textbox2.text = textest; iscount = false; else if (isdone) textbox2.text = textest; isdone = false; else if (iskeyupclear_2) /对是否按下clear键的判断 textbox2.text = textest; iskeyupclear_2 = false; else textbox2.text += textest; btnequal.select(); /设置=号的焦点 /设置运算类型 private void setoperator(int operation) if (textbox2.text.length 0) symboli=operation; mainnumi = float.parse(textbox2.text); i+; issecond = true; isdone = false; iscount = true; btnequal.select(); /设置=号的焦点 private void equal_operation(int i)/优先级判断 简直写疯了。 int j = 0; int m = 0; while( j 1) /高优先级运算 j+; switch (symbolj) case 4: result = mainnumj * mainnumj+1; break; case 5: result = mainnumj / mainnumj+1; break; /第一个优先级运算 m = j - 1; while (m=0)/第二个以后优先级运算 if (symbolj + 1 - symbolm 1) switch (symbolj + 1) /判断所进行的运算 case 4: result = result * mainnumj + 2; break; case 5: result = result / mainnumj + 2; break; j+; else switch (symbolm) /判断所进行的运算 case 1: result = mainnumm + result; break; case 2: result = mainnumm - result; break; m-; mainnumj+1 = result; j+; else /低优先级运算 switch ( symbolj ) case 1: result = mainnumj + mainnumj + 1; break; case 2: result = mainnumj - mainnumj + 1; break; case 4: result = mainnumj * mainnumj + 1; break; case 5: result = mainnumj / mainnumj + 1; break; mainnumj+1 = result; j+; settext(result.tostring(); while (j 0)/清空符号 j-; symbolj = 0; private void doequals() if (issecond) /判断已经输入第二个数后按了=号键 mainnumi = float.parse(textbox2.text); equal_operation(i); settext2(clear); isdone = true; issecond = false; private void form1_load(object sender, eventargs e) private void button1_click(object sender, eventargs e) settext(1); settext2(1); private void button2_click_1(object sender, eventargs e) settext(2); settext2(2); private void button3_click(object sender, eventargs e) settext(3); settext2(3); private void button4_click(object sender, eventargs e) settext(4); settext2(4); private void button5_click(object sender, eventargs e) settext(5); settext2(5); private void button6_click(object sender, eventargs e) settext(6); settext2(6); private void button7_click(object sender, eventargs e) settext(7); settext2(7); private void button8_click(object sender, eventargs e) settext(8); settext2(8); private void button9_click(object sender, eventargs e) settext(9); settext2(9); private void button13_click(object sender, eventargs e) settext(0); settext2(0); private void btn_point_click(object sender, eventargs e) settext(.); settext2(.); private void btnbackspace_click(object sender, eventargs e) settext(); settext2(); private void btn_clear_click(object sender, eventargs e) settext(clear); settext2(clear); private void button10_click(object sender, eventargs e) settext(+); setoperator(1); private void button11_click(object sender, eventargs e) settext(-); setoperator(2); private void button12_click(object sender, eventargs e) settext(*); setoperator(4); private void button15_click(object sender, eve