计算机组成原理逻辑运算

组成原理课程设计说明书计算机组成原理算法实现（三）专业计算机科学与技术学生姓名班级学号指导教师完成日期1 课程设计目的本课程设计是在学完本课程教学大纲规定的全部内容、完成所有实践环节的基础上，旨在深化学生学习的计算机组成原理课程基本知识，进一步领会计算机组成原理的一些算法，并进行具体实现，提高分析问题、解决问题的综合应用能力。

2 课程设计内容与要求内容：计算机组成原理算法实现（五）要求：课题③能够实现逻辑运算（逻辑非、逻辑加、逻辑乘、逻辑异）、定点整数的单符号位补码加减运算、定点整数的原码一位乘法运算和浮点数的加减运算。

3 功能模块详细设计3.1 主窗体设计系统进入（主）窗体的设计：菜单需要在输入口令正确后方可激活使用。

口令输入错误时要给出重新输入口令的提示，三次口令输入错误应该禁止使用。

具体现实如下：窗体由visual studio 2017 中c#窗体设计中的各种UI插件完成，如label、button、textbox、messagebox等插件组合完成，在插件的使用中还可以改变字体背景大小颜色，例如我插入了图片，label背景颜色为透明。

插件还可以输入口令后直接回车进入在进入此页面后，未显示任何菜单栏选项，只有正确输入口令后方可进入菜单窗体进行能使用，三次失败后便立即退出，此处用到了ｉｆ（ｅｑｕａｌ（））语句，只有密码相等才可以效果图如下：这些弹窗均由messagebox插件完成。

3.2菜单窗体这些便是这次实验设计的所完成的主要功能，包括逻辑运算、定点整数的补码加减，定点整数的原码乘法，浮点数的加减运算.此外，窗体的交替由 hide（）和show（）方法表示。

3.3 逻辑运算窗体设计逻辑运算分为逻辑加、逻辑非，逻辑乘和逻辑异，即上课所学的交非并异或四种逻辑运算，主要由textbox插件接收输入的数字，然后通过if语句判断进行结果输出，如非运算就是“1”→“0”，“0”→“1”,通过数组遍历，一个一个往后检查直至全部替换完毕，逻辑乘即是并，逻辑非关键代码如下所示：if (a[i] == '0') d[i] = '1';if (a[i] == '1') d[i] = '0';}c = new string(d);通过实体化具体输出后进行数组遍历改变，同理其余的逻辑运算只需要加上if 语句条件，结果效果如下图所示：另外，输入按钮由foucus()函数控制，点击输入后无论鼠标原来在哪，都会重新在第一行，返回依然是hide() 和show()函数，即隐藏此页面，显示菜单窗体。

3.4 定点整数的单符号位加减运算加减运算通过求出原码反码补码然后利用补码进行加法运算，运用到了自定义函数，附于附录之中。

首先定义原码函数，即将符号位换位0或1表示，接着运用if函数进行取反，最后判断最后一位求出补码。

效果图如下如果是减法的话，便是求出第二个数相反数的补码，再次相加，此时再自定义三个函数，唯一区别在于原码，即如果是“＋”是“0”，而“-”是“1”，最后补码套用加法函数这样：this.no4.Text=(AddBinary(BM(FM(YM(this.no1.Text))),BM(FM(JYM(this.no2.Te xt)))));效果图如下：3.5 定点整数的原码乘法窗体设计定点整数原码的乘法，是基于加法之上的，在进行每一次求积的过程时，都需要将乘积保存下来，按照我的设计思路，实现方法如下所述：首先，创建BYM（）函数，这个函数的目的是将带符号的定点整数化为原码进行此后的运算，然后开始一位一位的进行乘法运算，最后，乘法的关键，自定义了一个乘法函数YMYWmultip（），自己理解的位置的关系进行加法，最后，通过逻辑异或运算，即同号为0，保证结果的符号正确。

3.6 浮点数的加减运算窗体设计浮点数的加减运算是上课时老师一步一步做的，在实现这个功能时，逻辑是与写题时相同的，首先将阶码和尾数变成原码，接着反码、补码。

第一步，对阶，第一个数和第二个数进行对阶，产生偏移量改变阶码，第二步，尾数求和，尾数的补码相加，第三步，规格化，再次产生偏移量，改变阶码，继而进行尾数处理，最后，判断溢出。

再次让补码变成原码输出。

而减法不同的便是尾数求和这一步，原理与前面的单符号位加减运算相同，区别在于符号位由一位变为两位。

以上均要判断正负溢出，具体在代码之中，效果图如下：3.7 窗体的美观设计在c#窗体设计中，有许多可以美观优化的地方，这些均可以使用插件的属性进行设计改变。

如：颜色，字体大小，名称，背景图片都可以在这一栏进行设计，比如，我在插件ｂａｃｋｇｒｏｕｎｄ中插入图片，其余插件为透明色，边框为粉红，窗体弹出设为居中，使窗体更美观简洁。

4 设计小结这次计算机组成原理课设大大提升了我的c#编程能力，原先没有掌握的的数据类型转换，基本函数也在大脑中留下了记忆，在这次实验中，同学们积极讨论，使自己对于补码和浮点数的相关知识得到了夯实巩固，其原理得到了理解，感谢于同学的帮助，原先我们大部分是编程控制台代码，这一次，是窗体设计，受益良多，自身又得到了提高。

参考文献[1] 白中英. 计算机组成原理（第五版）[M]. 北京: 科学出版社, 2010.[1] 明日科技. c#从入门到精通（第三版）[M]. 北京: 清华大学出版社, 2010.附录代码主窗体代码public partial class Form1 : Form{int n = 3;public Form1(){InitializeComponent();}private void groupBox1_Enter(object sender, EventArgs e){}private void button1_Click(object sender, EventArgs e){string kl = this.textBox1.Text;if (kl.Equals("")){n--;MessageBox.Show("口令不能为空！你还有" + n + "次机会");}else{if (kl.Equals("111")){MessageBox.Show("登录成功！");new Form7().Show();this.Hide(); }else{n--;MessageBox.Show("口令错误！你还有"+n+"次机会");}}if (n < 1) { this.Close(); }}private voidtextBox1_TextChanged(object sender, EventArgs e) {}private void Form1_Load(object sender, EventArgs e){}}菜单代码：public partial class Form7 : Form{public Form7(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){new Form2().Show();this.Hide();}private void button2_Click(object sender, EventArgs e){new Form3().Show();this.Hide();}private void button3_Click(object sender, EventArgs e){new Form4().Show();this.Hide();}private void button4_Click(object sender, EventArgs e){new Form5().Show();this.Hide();}private void Form7_Load(object sender, EventArgs e){ }}逻辑运算窗体代码：namespace WindowsFormsApp1{public partial class Form2 : Form{public Form2(){InitializeComponent();}private void label2_Click(object sender, EventArgs e){}private void button6_Click(object sender, EventArgs e){new Form7().Show();this.Hide();}private void button1_Click(object sender, EventArgs e){no1.Focus();}private void label1_Click(object sender, EventArgs e){}private void button2_Click(object sender, EventArgs e) {string a = this.no1.Text;char[] b = a.ToCharArray();string c = this.ans.Text;int l = this.no1.Text.Length;char[] d = new char[l];for (int i = 0; i < l; i++){if (b[i] != '0' && b[i] != '1') {MessageBox.Show("只能输入0或1");}else{if(a[i] == '0') d[i] = '1';if(a[i] == '1') d[i] = '0'; }c = new string(d);this.ans.Text = c;}}private void button3_Click(object sender, EventArgs e){string a = this.no1.Text;char[] b = a.ToCharArray();string c = this.ans.Text;string f = this.no2.Text;char[] g = f.ToCharArray();int l = this.no1.Text.Length;char[] d = new char[l];for (int i = 0; i < l; i++){if (b[i] != '0' && b[i] != '1') {MessageBox.Show("只能输入0或1");}else{if(a[i]=='0'&& g[i]=='0') d[i] = '0';else d[i] = '1';}}c = new string(d);this.ans.Text = c;}private void button4_Click(object sender, EventArgs e){string a = this.no1.Text;char[] b = a.ToCharArray();string c = this.ans.Text;string f = this.no2.Text;char[] g = f.ToCharArray();int l = this.no1.Text.Length;char[] d = new char[l];for (int i = 0; i < l; i++){if (b[i] != '0' && b[i] != '1') {MessageBox.Show("只能输入0或1");}else{ if (a[i] == '1' && g[i] == '1') d[i] = '1';else d[i] = '0'; }}c = new string(d);this.ans.Text = c;}private void button5_Click(object sender, EventArgs e){string a = this.no1.Text;char[] b = a.ToCharArray();string c = this.ans.Text;string f = this.no2.Text;char[] g = f.ToCharArray();int l = this.no1.Text.Length;char[] d = new char[l];for (int i = 0; i < l; i++){if (b[i] != '0' && b[i] != '1') { MessageBox.Show("只能输入0或1");}else{if(a[i] == g[i]) d[i] = '0';else d[i] = '1';}}c = new string(d);this.ans.Text = c;}private void no1_TextChanged(object sender, EventArgs e){}private void Form2_Load(object sender, EventArgs e){} }}定点整数的单符号位补码加减运算窗体：namespace WindowsFormsApp1{public partial class Form3 : Form{public Form3(){InitializeComponent();}public string YM(string n){string ym;if (n.Substring(0, 1) == "+"){//输入的是正数，符号位输出0ym = "0" + n.Substring(1,n.Length - 1);}else if (n.Substring(0, 1) == "-") {ym = "1" + n.Substring(1,n.Length - 1);}//输入的是负数，符号位输出1else{MessageBox.Show("请输入符号");return"数据出错!";}return ym；}public string JYM(string n){string jym;if (n.Substring(0, 1) == "+"){//输入的是正数，符号位输出0jym = "1" + n.Substring(1,n.Length - 1);}else if (n.Substring(0, 1) == "-") {jym = "0" + n.Substring(1,n.Length - 1);}//输入的是负数，符号位输出1else{MessageBox.Show("请输入符号");return"数据出错!";}return jym;}public string JFM(string jym){string jfm = jym.Substring(0, 1);if (jym.Substring(0, 1) == "0"){//输入的是正数jfm = jym;}else if(jym.Substring(0, 1) == "1") {for (int i = 1; i < jym.Length; i++){if (jym.Substring(i, 1) == "0") jfm = jfm + "1";else if(jym.Substring(i, 1) == "1") jfm = jfm + "0";}}return jfm;}public string FM(string ym){string fm=ym.Substring (0,1);if (ym.Substring(0, 1) == "0"){//输入的是正数fm=ym;}else if (ym.Substring(0, 1) == "1") {for(int i=1;i<ym.Length; i++) {if (ym.Substring(i, 1) == "0") fm = fm + "1";else if(ym.Substring(i, 1) == "1") fm = fm + "0";}}return fm;}private static string AddBinary(string a, string b){//找出最长的加1，留1位进位var max = Math.Max(a.Length,b.Length) + 1;//按总长度补位，以便统一处理，否则要考虑边界var a2 = a.PadLeft(max, '0');var b2 = b.PadLeft(max, '0');//定义list存中间计算结果var list = new List<int>();//进位标志var carryFlag = false;for (int i = max - 1; i >= 0; i--) {var add =int.Parse(a2[i].ToString()) +int.Parse(b2[i].ToString());//计算当前位的值，如果之前进位标志为真，则额外+1if (carryFlag) add++;//大于等于2时，此时仍然需要进位，带入下一次循环carryFlag = add >= 2;//存入中间计算结果list.Add(add % 2);}//定义结果var res = string.Empty;//反转，list是按逆序从低位到高位的 list.Reverse();//遍历输出到reslist.ForEach(r => { res +=r.ToString(); });//取消最高位0res = res.Substring(1, res.Length - 1);//res = res.TrimStart('0');//如果空了，返回0if (res.Length == 0) res = "0";//返回结果return res;}public string BM(string fm){string bm = fm.Substring(0, 1);if (fm.Substring(0, 1) == "0"){//输入的是正数bm = fm;}else if (fm.Substring(0, 1) == "1") {if(fm.Substring(fm.Length - 1, 1) == "0") bm = fm.Substring (0,fm.Length -1) + "1";else if(fm.Substring(fm.Length - 1, 1) == "1") bm = AddBinary(fm, "1");}return bm;}public string JBM(string jfm){string jbm = jfm.Substring(0, 1);if (jfm.Substring(0, 1) == "0"){//输入的是正数jbm = jfm;}else if(jfm.Substring(0, 1) == "1") {if (jfm.Substring(jfm.Length - 1, 1) == "0") jbm = jfm.Substring (0,jfm.Length -1) + "1";else if(jfm.Substring(jfm.Length - 1, 1) == "1") jbm = AddBinary(jfm, "1");}return jbm;}private void label5_Click(object sender, EventArgs e){}private void label3_Click(object sender, EventArgs e){}private void button4_Click(object sender, EventArgs e){new Form7().Show();this.Hide();}private void button1_Click(object sender, EventArgs e){no1.Focus();}private void Form3_Load(object sender, EventArgs e){}private void no1_TextChanged(object sender, EventArgs e){}private void button2_Click(object sender, EventArgs e ){this.no3.Text =AddBinary(BM(FM(YM(this.no1.Text))),BM(FM(YM(this.no2.Text))));}private void no4_TextChanged(object sender, EventArgs e){}private void button3_Click(object sender, EventArgs e){/*MessageBox.Show(YM(this.no1.Text)); MessageBox.Show(FM(YM(this.no1.Text))); MessageBox.Show(BM(FM(YM(this.no1.Text)))); MessageBox.Show(YM(this.no2.Text)); MessageBox.Show(FM(YM(this.no2.Text)));MessageBox.Show(BM(FM(YM(this.no2.Text))));*/this.no4.Text =(AddBinary(BM(FM(YM(this.no1.Text))),BM(FM(JYM(this.no2.Text)))));}}}定点整数的原码乘法public static string BYM(string n)//无符号原码 {string ym;if (n.Substring(0, 1) == "+"){//输入的是正数，符号位输出0ym = n.Substring(1, n.Length - 1);}else if (n.Substring(0, 1) == "-") {ym = n.Substring(1, n.Length - 1);}//输入的是负数，符号位输出1else{MessageBox.Show("请输入符号");return"数据出错!";}string temp = ym.Substring(0, 1);if (ym.Length < 8){for(int m = 1; m <= 8 - ym.Length; m++){temp = temp + "0";}}return ym;}public string YMYWmultip(string bcym, string cym){int bclen = bcym.Length;int clen = cym.Length;string sum = "0";//string []sum = new string[] { };for (int i = clen - 1; i >= 0; i--) {if (cym.Substring(i, 1) == "1") {//MessageBox.Show(bcym.PadRight(bclen + clen - i - 1, '0'));sum = AddBinary(sum, bcym.PadRight(bclen + clen - i - 1, '0'));}}return sum;}private static string AddBinary(string a, string b){//找出最长的加1，留1位进位var max = Math.Max(a.Length,b.Length) + 1;//按总长度补位，以便统一处理，否则要考虑边界var a2 = a.PadLeft(max, '0');var b2 = b.PadLeft(max, '0');//定义list存中间计算结果var list = new List<int>();//进位标志var carryFlag = false;for (int i = max - 1; i >= 0; i--) {var add =int.Parse(a2[i].ToString()) +int.Parse(b2[i].ToString());//计算当前位的值，如果之前进位标志为真，则额外+1if (carryFlag) add++;//大于等于2时，此时仍然需要进位，带入下一次循环carryFlag = add >= 2;//存入中间计算结果list.Add(add % 2);}//定义结果var res = string.Empty;//反转，list是按逆序从低位到高位的 list.Reverse();//遍历输出到reslist.ForEach(r => { res +=r.ToString(); });//取消最高位0res = res.TrimStart('0');//如果空了，返回0if (res.Length == 0) res = "0";//返回结果return res; }private void button3_Click(object sender, EventArgs e){new Form7().Show();this.Hide();}private voidtextBox1_TextChanged(object sender, EventArgs e){}private void button1_Click(object sender, EventArgs e){no1.Focus();}private void button2_Click(object sender, EventArgs e){ans.Text = YMYWmultip(BYM(no1.Text), BYM(no2.Text));bool cf1 = true, cf2 = true;if(no1.Text.Substring(0, 1) == "+") {cf1 = true;}else if(no1.Text.Substring(0, 1) == "-") cf1 = false;if(no2.Text.Substring(0, 1) == "+") {cf2 = true;}else if(no2.Text.Substring(0, 1) == "-") cf2 = false;if (cf1 ^ cf2 == true){ans.Text = "-" + ans.Text;}else ans.Text = "+" + ans.Text;}}}浮点数的加减运算namespace WindowsFormsApp1{public partial class Form5 : Form{public Form5(){InitializeComponent();}public static string AddBinary(string a, string b){//找出最长的加1，留1位进位var max = Math.Max(a.Length, b.Length) + 1;//按总长度补位，以便统一处理，否则要考虑边界var a2 = a.PadLeft(max, '0');var b2 = b.PadLeft(max, '0');//定义list存中间计算结果var list = new List<int>();//进位标志var carryFlag = false;for (int i = max - 1; i >= 0; i--) {var add = int.Parse(a2[i].ToString()) + int.Parse(b2[i].ToString());//计算当前位的值，如果之前进位标志为真，则额外+1if (carryFlag) add++;//大于等于2时，此时仍然需要进位，带入下一次循环carryFlag = add >= 2;//存入中间计算结果 list.Add(add % 2);}//定义结果var res = string.Empty;//反转，list是按逆序从低位到高位的 list.Reverse();//遍历输出到reslist.ForEach(r => { res += r.ToString(); });//取消最高位0//res = res.TrimStart('0');//如果空了，返回0if (res.Length == 0) res = "0";//返回结果return res;}public static string BXYM(string n)//变形原码{string ym;if (n.Substring(0, 1) == "+"){//输入的是正数，符号位输出0ym = "00" + n.Substring(1, n.Length - 1);}else if (n.Substring(0, 1) == "-") {ym = "11" + n.Substring(1, n.Length - 1);}//输入的是负数，符号位输出1else if (n.Substring(0, 2) == "01" || n.Substring(0, 2) == "10"){ym = "11" + n.Substring(2, n.Length - 2);} //正溢出或负溢出else if (n.Substring(0, 2) == "11" || n.Substring(0, 2) == "00"){ym = n;}else{MessageBox.Show("请输入符号"); return "数据出错!";}string temp = ym.Substring(0, 2); if (ym.Length < 8){for (int m = 1; m <= 8 - ym.Length; m++){temp = temp + "0";}ym = temp + ym.Substring(2, ym.Length - 2);}return ym;}public static string BXFM(string ym)//变形反码{string fm = ym.Substring(0, 2);if (ym.Substring(0, 2) == "00"){//输入的是正数fm = ym;}else if (ym.Substring(0, 2) == "11") {for (int i = 2; i <= ym.Length - 1; i++){if (ym.Substring(i, 1) == "0"){fm = fm + "1";}else if (ym.Substring(i, 1) == "1") fm = fm + "0";}}//输入的是负数else{MessageBox.Show("请输入符号"); return "数据出错!";}return fm;}public static string BXBM(string fm) //变形补码{string bm = fm.Substring(0, 2);if (fm.Substring(0, 2) == "00"){bm = fm;}else if (fm.Substring(0, 2) == "11") {if (fm.Substring(fm.Length - 1, 1) == "0"){bm = fm.Substring(0, fm.Length - 1) + "1";}else{bm = AddBinary(fm, "1");}}return bm;}public static string AddBinaryF(string input1, string input2){int strlen = Math.Max(input1.Length, input2.Length) + 1;string output;output = AddBinary(BXBM(BXFM(BXYM(input1))),BXBM(BXFM(BXYM(input2))));if (output.Length > strlen){//MessageBox.Show("过长溢出"); output = output.Substring(output.Length - strlen, strlen);}if (output.Substring(0, 2) == "01") {//正溢出output = BXBM(BXFM(BXYM(output)));if (output.Length > strlen){//MessageBox.Show("过长溢出");output = output.Substring(output.Length - strlen, strlen);}MessageBox.Show("存在正溢出，计算补码结果");output = "00" + output.Substring(2, output.Length - 2);}else if (output.Substring(0, 2) == "10"){//负溢出output = BXBM(BXFM(BXYM(output)));if (output.Length > strlen){//MessageBox.Show("过长溢出");output = output.Substring(output.Length - strlen, strlen);}MessageBox.Show("存在负溢出，计算补码结果");output = "11" + output.Substring(2, output.Length - 2);}else if (output.Substring(0, 2) == "11"){//负溢出output = BXBM(BXFM(BXYM(output)));if (output.Length > strlen){//MessageBox.Show("过长溢出");output = output.Substring(output.Length - strlen, strlen);}MessageBox.Show("结果为负，计算补码结果");output = "11" + output.Substring(2, output.Length - 2);}return output;}private void label2_Click(object sender, EventArgs e){}private void TextBox1_TextChanged(object sender, EventArgs e){}private void button4_Click(object sender, EventArgs e){new Form7().Show();this.Hide();}private void button1_Click(object sender, EventArgs e){no1.Focus();}private void button2_Click(object sender, EventArgs e){string e1, e2, m1, m2, m0, e0; string m1r = "", m2r = "";int strlen, erm = 0, mlm = 0;string em = "";string inputcl = "";int e10, e20, e00;if (no3.Text.Substring(0, 1) == "+") {inputcl = "-" + (no3.Text.Substring(1, no3.Text.Length - 1)); }else if (no3.Text.Substring(0, 1) == "-"){inputcl = "+" + (no3.Text.Substring(1, no3.Text.Length - 1)); }//e1 = BXBM(BXFM(BXYM(no1.Text))); //e2 = BXBM(BXFM(BXYM(inputcl))); strlen = Math.Max(no1.Text.Length, no3.Text.Length) + 1;//e0 = AddBinary(e1, e2);//MessageBox.Show(e0.Length +"|"+strlen);//if (e0.Length > strlen)//{ e0 = e0.Substring(e0.Length - strlen, strlen); }m1 = no2.Text.Substring(3, 6);m2 = no4.Text.Substring(3, 6);e1 = Form4.BYM(no1.Text);e2 = Form4.BYM(no3.Text);if (no1.Text.Substring(0, 1) == "+") {e10 = System.Convert.ToInt32(e1, 2) * 1;}else e10 = System.Convert.ToInt32(e1, 2) * -1;if (no3.Text.Substring(0, 1) == "+"){e20 = System.Convert.ToInt32(e2, 2) * 1;}else e20 = System.Convert.ToInt32(e2, 2) * -1;e00 = e10 - e20;if (e00 >= 0){em = no1.Text;erm = e00;MessageBox.Show("阶码对齐，e1大，e2偏移量：" + erm);}else{em = no3.Text;erm = e00 * -1;MessageBox.Show("阶码对齐，e2大，e1偏移量：" + erm);}//for (int i = 0; i <= erm; i++)//{if (em == no1.Text){m2r = m2.Substring(m2.Length - erm, erm);m2 = m2.Substring(0, m2.Length - erm);MessageBox.Show(m2);m2 = m2.PadLeft(6, '0');MessageBox.Show(m2 + "(" + m2r + ")");}else{m1r = m1.Substring(m1.Length - erm, erm); m1 = m1.Substring(0, m1.Length - erm);MessageBox.Show(m1);m1 = m1.PadLeft(6, '0');MessageBox.Show(m1 + "(" + m1r + ")");}m1 = no2.Text.Substring(0, 1) + m1; m2 = no4.Text.Substring(0, 1) + m2; //MessageBox.Show(m1);//MessageBox.Show(m2);m0 = AddBinary(BXBM(BXFM(BXYM(m1))), BXBM(BXFM(BXYM(m2))));//MessageBox.Show(m0);if (m0.Length > 8){//MessageBox.Show("过长溢出"); m0 = m0.Substring(m0.Length - 8, 8);}if (m0.Substring(0, 2) == "01"){//正溢出m0 = BXBM(BXFM(BXYM(m0)));if (m0.Length > 8){//MessageBox.Show("过长溢出");m0 = m0.Substring(m0.Length - 8, 8);}MessageBox.Show("存在正溢出，计算补码结果：" + m0);m0 = "00" + m0.Substring(2, m0.Length - 2);mlm = m0.Substring(2, m0.Length - 2).IndexOf('1');m0 = m0.Substring(2, m0.Length - mlm);for (int o = 0; o <= mlm - 1; o++) {if (m1r.Length > o) m0 = m0 + m1r.Substring(o, 1);if (m2r.Length > o) m0 = m0 + m2r.Substring(o, 1);}m0 = m0.PadRight(8, '0');}else if (m0.Substring(0, 2) == "10") {//负溢出m0 = BXBM(BXFM(BXYM(m0)));if (m0.Length > 8){//MessageBox.Show("过长溢出");m0 = m0.Substring(m0.Length - 8, 8);}MessageBox.Show("存在负溢出，计算补码结果：" + m0);m0 = "11" + m0.Substring(2, m0.Length - 2);mlm = m0.Substring(2, m0.Length - 2).IndexOf('0');m0 = m0.Substring(2, m0.Length - mlm);for (int o = 0; o <= mlm - 1; o++) {if (m1r.Length > o) m0 = m0 + m1r.Substring(o, 1);if (m2r.Length > o) m0 = m0 + m2r.Substring(o, 1);} m0 = m0.PadRight(6, '0');}else if (m0.Substring(0, 2) == "00") {MessageBox.Show("尾码为正."); MessageBox.Show("找 1 " + m0.Substring(2, m0.Length - 2));mlm = m0.Substring(2, m0.Length - 2).IndexOf('1');MessageBox.Show("计算尾数规格化偏移：" + mlm);m0 = m0.Substring(2, 6).Substring(mlm, 6 - mlm);MessageBox.Show("尾数未规格化：" + m0);for (int o = 0; o <= mlm - 1; o++) {if (m1r.Length > o) m0 = m0 + m1r.Substring(o, 1);if (m2r.Length > o) m0 = m0 + m2r.Substring(o, 1);MessageBox.Show("尾数规格化开始：" + m0);}m0 = m0.PadRight(6, '0');m0 = "00" + m0;MessageBox.Show("尾数规格化结束：" + m0);}else if (m0.Substring(0, 2) == "11") {MessageBox.Show("尾码为负，最终将使用补码结果：" + m0);MessageBox.Show("找0 " + m0.Substring(2, m0.Length - 2));mlm = m0.Substring(2, m0.Length - 2).IndexOf('0');MessageBox.Show("计算尾数规格化偏移：" + mlm);m0 = m0.Substring(2, 6).Substring(mlm, 6 - mlm);MessageBox.Show("尾数未规格化：" + m0);for (int o = 0; o <= mlm - 1; o++) {if (m1r.Length > o) m0 = m0 + m1r.Substring(o, 1);if (m2r.Length > o) m0 = m0 + m2r.Substring(o, 1);MessageBox.Show("尾数规格化：" + m0);}m0 = m0.PadRight(6, '0');m0 = "11" + m0;MessageBox.Show("尾数规格化：" + m0);}//e0 = System.Convert.ToString(System.Convert.ToInt32 (em, 2) - mlm, 2);MessageBox.Show("计算阶码偏移，当前阶码：" + em + "，偏移量：" + "-" + System.Convert.ToString(mlm, 2));//e0 = AddBinary(BXBM(BXFM(BXYM(em))),BXBM(BXFM(BXYM("-" + System.Convert.ToString(mlm,2)))));e0 = AddBinaryF(em, "-" + System.Convert.ToString(mlm, 2));MessageBox.Show(e0);if (e0.Length > 5){//MessageBox.Show("过长溢出"); e0 = e0.Substring(m0.Length - 5, 5); }//if (e0.Substring(0,2)=="11") e0 = BXBM(BXFM(e0));if (m0.Substring(0, 2) == "11") m0 = BXBM(BXFM((m0)));if (m0.Length > 8){//MessageBox.Show("过长溢出"); m0 = m0.Substring(m0.Length - 8, 8);}if (m1r.Length > mlm){if (m1r.Substring(mlm, 1) == "1") m0 = AddBinaryF(m0, "+1");}if (m2r.Length > mlm){if (m2r.Substring(mlm, 1) == "1") m0 = AddBinaryF(m0, "+1");}if (m0.Length > 8){//MessageBox.Show("过长溢出"); m0 = m0.Substring(m0.Length - 8, 8);}ans1.Text = e0;ans2.Text = m0;}private void ans4_TextChanged(object sender, EventArgs e){}private void button3_Click(objectsender, EventArgs e){string e1, e2, m1, m2, m0, e0;string m1r = "", m2r = "";int strlen, erm = 0, mlm = 0;string em = "";string inputcl = "";int e10, e20, e00;if (no3.Text.Substring(0, 1) == "+") {inputcl = "-" + (no3.Text.Substring(1, no3.Text.Length - 1)); }else if (no3.Text.Substring(0, 1) == "-"){inputcl = "+" + (no3.Text.Substring(1, no3.Text.Length - 1)); }//e1 = BXBM(BXFM(BXYM(no1.Text))); //e2 = BXBM(BXFM(BXYM(inputcl))); strlen = Math.Max(no1.Text.Length, no3.Text.Length) + 1;//e0 = AddBinary(e1, e2);//MessageBox.Show(e0.Length +"|"+strlen);//if (e0.Length > strlen)//{ e0 = e0.Substring(e0.Length - strlen, strlen); }m1 = no2.Text.Substring(3, 6);m2 = no4.Text.Substring(3, 6);e1 = Form4.BYM(no1.Text);e2 = Form4.BYM(no3.Text);if (no1.Text.Substring(0, 1) == "+") {e10 = System.Convert.ToInt32(e1, 2) * 1;} else e10 = System.Convert.ToInt32(e1, 2) * -1;if (no3.Text.Substring(0, 1) == "+") {e20 = System.Convert.ToInt32(e2, 2) * 1;}else e20 = System.Convert.ToInt32(e2, 2) * -1;e00 = e10 - e20;if (e00 >= 0){em = no1.Text;erm = e00;MessageBox.Show("阶码对齐，e1大，e2偏移量：" + erm);}else{em = no3.Text;erm = e00 * -1;MessageBox.Show("阶码对齐，e2大，e1偏移量：" + erm);}//for (int i = 0; i <= erm; i++)//{if (em == no1.Text){m2r = m2.Substring(m2.Length - erm, erm);m2 = m2.Substring(0, m2.Length - erm);MessageBox.Show(m2);m2 = m2.PadLeft(6, '0');MessageBox.Show(m2 + "(" + m2r + ")");}else{m1r = m1.Substring(m1.Length - erm, erm);m1 = m1.Substring(0, m1.Length - erm);MessageBox.Show(m1);m1 = m1.PadLeft(6, '0');MessageBox.Show(m1 + "(" + m1r + ")");}m1 = no2.Text.Substring(0, 1) + m1; m2 = no4.Text.Substring(0, 1) + m2; //MessageBox.Show(m1);//MessageBox.Show(m2);if (m2.Substring(0, 1) == "+"){m2 = "-" + m2.Substring(1, m2.Length - 1);}elsem2 = "+" + m2.Substring(1, m2.Length - 1);m0 = AddBinary(BXBM(BXFM(BXYM(m1))), BXBM(BXFM(BXYM(m2))));//MessageBox.Show(m0);if (m0.Length > 8){//MessageBox.Show("过长溢出"); m0 = m0.Substring(m0.Length - 8, 8);}if (m0.Substring(0, 2) == "01"){//正溢出m0 = BXBM(BXFM(BXYM(m0)));if (m0.Length > 8){//MessageBox.Show("过长溢出");m0 = m0.Substring(m0.Length - 8, 8);}MessageBox.Show("存在正溢出，计算补码结果：" + m0);m0 = "00" + m0.Substring(2, m0.Length - 2);mlm = m0.Substring(2, m0.Length - 2).IndexOf('1');m0 = m0.Substring(2, m0.Length - mlm);for (int o = 0; o <= mlm - 1; o++) {if (m1r.Length > o) m0 = m0 + m1r.Substring(o, 1);if (m2r.Length > o) m0 = m0 + m2r.Substring(o, 1);}m0 = m0.PadRight(8, '0');}else if (m0.Substring(0, 2) == "10") {//负溢出m0 = BXBM(BXFM(BXYM(m0)));if (m0.Length > 8){//MessageBox.Show("过长溢出");m0 = m0.Substring(m0.Length - 8, 8);}MessageBox.Show("存在负溢出，计算补码结果：" + m0);m0 = "11" + m0.Substring(2, m0.Length - 2);。