private void button1_Click(object sender, EventArgs e)
{
String phrase = "";
String error = "";
//词法分析
c.fenxi(textBox1.Text, out phrase, out error);
textBox2.Text = phrase; //词法分析结果
textBox4.Text = "词法分析错误:\r\n";
textBox4.Text += error; //出现的错误
//Console.WriteLine(phrase);
//句法分析
JFFX j = new JFFX();
String sen = "";
j.fenxi(phrase, out sen, out error);
textBox3.Text = sen;
textBox4.Text += "\r\n语法分析错误:\r\n";
textBox4.Text += error;
//中间代码
textBox5.Text = YYFX.yuyi;
textBox5.Text += (YYFX.line + 1) + "\tend\r\n";//输出end 终结语义分析
//符号表
this.dataGridView1.Rows.Clear();
Hashtable fuhaobiao = YYFX.fuhaoBiao;
foreach (DictionaryEntry d in fuhaobiao)
{
FuHao fuhao = (FuHao)d.Value;
int index = this.dataGridView1.Rows.Add();
this.dataGridView1.Rows[index].Cells[0].Value = fuhao.name;
this.dataGridView1.Rows[index].Cells[1].Value = fuhao.width;
this.dataGridView1.Rows[index].Cells[2].Value = fuhao.offset;
this.dataGridView1.Rows[index].Cells[3].Value = fuhao.leixin;
}
dataGridView1.Sort(dataGridView1.Columns[2], ListSortDirection.Ascending);
}
//调用语义子程序的函数，在语法分析时同步调用，即可边进行语法分析，边得到语义分析结果
//i 得到具体要调用哪个语义子程序
//n 调用时变量等的值
//行号，报错时会用到
public static void run(int i, String n, string el)
{
switch (i)
{
case 1: //由于主函数以及其他函数比较特殊，涉及到int main，main是一个标识符，但却不需要进行语义分析。所以将其类型赋值为特殊
zxin = "teshu";
zw = 3;
break;
case 2:
name = n; //a.value，将函数中的函数名，即一个标识符赋值给name变量
break;
case 3: //char
bxin = "char";
w = 1; //变量宽度为1
break;
case 4: //double
bxin = "double";
w = 8; //变量宽度为8
break;
case 5: //float
bxin = "float";
w = 8;
break;
case 6: //int
bxin = "int";
w = 4;
break;
case 7: //long
bxin = "long";
w = 4;
break;
case 8: //short
bxin = "short";
w = 4;
break;
case 9: //指针
zxin = "pointer( " + zxin + " )"; //类型是指针
zw = 4; //指针占多少字节
break;
case 10: //数组
sxin = sxin.Replace(bxin, "array(" + int.Parse(n) + ", " + bxin + ")"); //敲定类型，int.Parse(n)是数组大小，bxin是数组类型
sw = int.Parse(n) * sw; //数组占多少个字节，即程序一开始要为数组分配多少内存；n的值就是数组[]内的值
// yuyi += "" + (++line) + "\t" + newTmp() + " = " + int.Parse(n) + "\r\n";//
// yuyi += "" + (++line) + "\t" + newTmp() + " = " + shuZuName + "[" + getTmp(2) + "]\r\n";//
// Console.WriteLine("Hello World!");
break;
case 11: //数组
sxin = bxin; //数组的类型，int，char等
sw = w; //数组的宽度
break;
case 12: //数组初始化，紧接11
xin = zxin.Replace("teshu", sxin); //确定类型，将得到的sxin替换teshu得到新属性
w = (4 - zw) * (sw - 3) + zw; //重新计算数组所占内存大小，zw为指针宽度，变量宽度=(4-指针宽度)*(数组宽度-3)+指针宽度；zw被初始化为3
if (fuhaoBiao[name] == null) //如果该数组在fuhaobiao中不存在，就将其添加至fuhaobiao中
{
fuhaoBiao[name] = new FuHao(name, offset, xin, w);
offset += w;
}
else //变量重复声明时报错
{
w = 0;
xin = "";
errIn += "line " + el + "\t变量 " + name + " 重复声明\r\n";
}
break;
case 13: //老规矩，不知道时就先用teshu替代
zxin = "teshu";
zw = 3;
break;
case 14: //已经知道到底是什么类型了，名称和所占的内存大小也知道了
name = n; //名称
sxin = bxin; //类型
sw = w; //位移，内存
break;
case 15:
xin = zxin.Replace("teshu", sxin); //找出真正的类型
w = (4 - zw) * (sw - 3) + zw; //计算一个这样的符号应占多少内存
if (fuhaoBiao[name] == null)
{
fuhaoBiao[name] = new FuHao(name, offset, xin, w); //将变量加入符号表中
offset += w;
}
else
{
w = 0;
xin = "";
errIn += "line " + el + "\t变量 " + name + " 重复声明\r\n";
}
break;
case 16: //赋值语句，类似 t3 = 0 ， a（这是个变量） = t3
yuyi += "" + (++line) + "\t" + fname + " = " + getTmp(1) + "\r\n";
break;
case 17: //得到变量的名称
fname = name;
break;
case 18: //和17配套，作用同16
yuyi += "" + (++line) + "\t" + fname + " = " + getTmp(1) + "\r\n";
break;
case 19: //例如，int a = 0；那么case 19就是t0 = 0，t0是一个临时变量
yuyi += "" + (++line) + "\t" + newTmp() + " = " + n + "\r\n";
break;
case 20: //将表达式得到的一个临时变量重新赋给一个新的临时变量，如t5 = t3*t4，t6 = t5这里表达的就是t6=t5这一层含义
yuyi += "" + (++line) + "\t" + newTmp() + " = " + Tz + "\r\n";
break;
case 21:
Ez = Tz; //
break;
case 22: //加法减法 左部 Ez 右部 Tz
yuyi += "" + (++line) + "\t" + newTmp() + " = " + Ez + " + " + Tz + "\r\n";
Tz = getTmp(1);
break;
case 23:
Ez = Tz;
break;
case 24:
yuyi += "" + (++line) + "\t" + newTmp() + " = " + Ez + " - " + Tz + "\r\n";
Tz = getTmp(1);
break;
case 25:
Tz = Fz;
break;
case 26: //乘法操作前变量赋值
Rz = Fz;
break;
case 27: //乘法除法 的左部Rz，开始乘法操作
yuyi += "" + (++line) + "\t" + newTmp() + " = " + Rz + " * " + Fz + "\r\n";
Fz = getTmp(1);
break;
case 28:
Rz = Fz;
break;
case 29:
yuyi += "" + (++line) + "\t" + newTmp() + " = " + Rz + " / " + Fz + "\r\n";
Fz = getTmp(1);
break;
case 30: //四则表达式的值可能是int值
Fz = n;
break;
case 31: //四则表达式的值可能是float值
Fz = n;
break;
case 32: //将得到的表达式中各个部分的值压入堆栈备用
biaodashi.Push(Ez);
biaodashi.Push(Tz);
biaodashi.Push(Fz);
biaodashi.Push(Rz);
break;
case 33: //使用堆栈中的变量，进行出栈操作
Tz = biaodashi.Pop();
Ez = biaodashi.Pop();
Rz = biaodashi.Pop();
Fz = biaodashi.Pop();
Fz = getTmp(1);
break;
case 34: //在不知道数组大小时先初始化为0
//wy = 0;
sd = 0;
break;
case 35:
//Fz = name;
Fz = getTmp(1);
break;
case 36:
biaodashi.Push(Ez);
biaodashi.Push(Tz);
biaodashi.Push(Fz);
biaodashi.Push(Rz);
//yuyi += "" + (++line) + "\t" + newTmp() + " = " + wy + "\r\n";
sd++;
break;
case 37: //使用数组
Rz = biaodashi.Pop();
Fz = biaodashi.Pop();
Tz = biaodashi.Pop();
Ez = biaodashi.Pop();
FuHao f = (FuHao)fuhaoBiao[shuZuName];
String [] s = f.leixin.Split(", ".ToCharArray()); //将数组类型分类出来，数组类型一般为array（5，int）这样
try
{
String ss = s[2 * sd - 2]; //一维就取出S[0]，二维取出S[1]，以此类推。
ss = ss.Substring(6, ss.Length - 6);
nw = nw / int.Parse(ss); //数组总占内存数/数组的的元素总量即为当前每个元素所占的大小
yuyi += "" + (++line) + "\t" + newTmp() + " = " + getTmp(2) + " * " + nw + "\r\n";
if (sd > 1) //数组维数大于1维
{
yuyi += "" + (++line) + "\t" + newTmp() + " = " + getTmp(2) + " + " + wy + "\r\n";
}
wy = getTmp(1);
}
catch
{
nw = 0;
errIn += "line " + el + "\t变量 " + shuZuName + " 数组引用错误\r\n";
}
break;
case 38: //假如符号表中没有该变量，就说明该变量是未声明就直接使用了，此时应输出异常
if (fuhaoBiao[n] == null)
{
errIn += "line " + el + "\t变量 " + name + " 没有声明即使用\r\n";
}
shuZuName = n;
nw = ((FuHao)fuhaoBiao[n]).width; //符号表中存储的一个该类型的符号所占内存大小
break;
case 39: //if条件句，p代表判断条件，panduan
yuyi += "" + (++line) + "\tif " + p + " goto " + (line + 2) + "\r\n";
yuyi += "" + (++line) + "\tgo1to Le \r\n";
break;
case 40: //如果判断条件实效，和case 39配套
yuyi += "" + (++line) + "\tgo2to Lin \r\n";
break;
case 41: //回填对应的行号
Le = "" + (line + 1);
yuyi = yuyi.Replace("Le", Le);
Lin = "" + (line + 1);
yuyi = yuyi.Replace("Lin", Lin);
break;
case 42: //else语句块中语句的行号指示
Le = "" + (line + 1);
yuyi = yuyi.Replace("Le", Le);
Lin = "" + (line + 1);
yuyi = yuyi.Replace("Lin", Lin);
break;
case 43: //while循环
yuyi += "" + (++line) + "\tif " + p + " goto " + (line + 2) + "\r\n"; //条件正确的话去那一行
yuyi += "" + (++line) + "\tgo3to We \r\n"; //条件错误的话去那一行
biaodashi.Push(wb); //将条件正确时跳转到的行号压入biaodashi栈留作后用
break;
case 44:
wb = biaodashi.Pop(); //弹出wb
yuyi += "" + (++line) + "\tgoto " + wb + " \r\n"; //这是是真跳出循环，不加的话会顺序执行，所以必须要加
we = "" + (line + 1);
yuyi = yuyi.Replace("We", we); //回填行号
break;
case 45: //do while
wb = "" + (line + 1); //找到条件正确时要跳转的行号
biaodashi.Push(wb); //压入栈留作备用
break;
case 46: //do while
wb = biaodashi.Pop();
yuyi += "" + (++line) + "\tif " + p + " goto " + wb + "\r\n"; //while（）中的条件，正确的话跳转到wb
break;
case 47: //条件判断
p = "" + getTmp(1) + "!=0";
break;
case 48:
pq = getTmp(1);
break;
case 49: //最后得到的结果形如 p = t11<t10
p = pq + bj + getTmp(1);
break;
case 50: //比较符号 bj means比较，n代表具体的符号
bj = n;
break;
case 51: //比较
bj = n;
break;
case 52: //比较
bj = n;
break;
case 53: //比较
bj = n;
break;
case 54: //比较
bj = n;
break;
case 55: //比较
bj = n;
break;
case 56: //真正的else语句，接case40
Le = "" + (line + 1);
yuyi = yuyi.Replace("Le", Le); //le才是真正else语句中的内容所对应的行号
break;
case 57: //while循环
wb = "" + (line + 1);
break;
case 58: //变量，数组等一系列初始化的开始，现将变量名赋值给fname
fname = name;
break;
case 59:
if (sd > 0) //数组维数如果大于一维的话
{ //wy代表数组的偏移
yuyi += "" + (++line) + "\t" + newTmp() + " = " + shuZuName + "[" + wy + "]" + "\r\n";
FuHao ff = (FuHao)fuhaoBiao[shuZuName];
String [] sss = ff.leixin.Split(", ".ToCharArray()); //举例，array[5,int]
String ss22;
try
{
ss22 = sss[2 * sd]; //得到数组类型，int或float
}
catch
{
errIn += "line " + el + "\t变量 " + shuZuName + " 引用错误\r\n";
return;
}
if (ss22.Substring(0, 3).Equals("int") || ss22.Substring(0, 5).Equals("float"))
{
}
else
{
errIn += "line " + el + "\t变量 " + shuZuName + " 未引用到基本类型\r\n";
}
}
else
{
yuyi += "" + (++line) + "\t" + newTmp() + " = " + shuZuName + "\r\n";
}
break;
case 60: //将case 2中的IDN，即函数的名称赋值给hanshuname，原来的name是泛指，这里就变成特指函数名了
hanshuname = name;
fhxin = zxin.Replace("teshu", bxin);
canshuzu = ""; //此时还不知道具体的参数，暂且赋值为空
break;
case 61: //类型未知时先赋值为teshu
zxin = "teshu";
break;
case 62: //数组的具体类型
sxin = bxin;
break;
case 63: //将原来的未知类型teshu替换成已知的数组类型
String canshu = zxin.Replace("teshu", sxin);
if (canshuzu.Equals("")) //假如参数组中没有任何内容
{
canshuzu = canshu;
}
else //否则的话，在原有内容的基础上加入新内容
{
canshuzu = canshuzu + "X" + canshu;
}
break;
case 64:
if (fuhaoBiao[hanshuname] == null)
{
if (canshuzu.Equals("")) //如果参数组中没有任何值，就将其赋值为“空”
{
canshuzu = "空";
}
fuhaoBiao[hanshuname] = new FuHao(hanshuname, offset, canshuzu + "->" + fhxin, 4);
offset += 4;
}
else //出现错误
{
errIn += "line " + el + "\t变量 " + name + " 重复声明\r\n";
}
break;
default:
break;
}
}
