yufa.cs

一个非常好的语法分析器

                            }
                        } while (table[getid(zhan[j]), getid(op)] == '>' || table[getid(zhan[j]), getid(op)] == '=' || table[getid(zhan[j]), getid(op)] == 'e');//直到temp[j]的优先级<temp[op]

                        putout = putout + "  "+zhan[j] + " "+table[getid(zhan[j]), getid(temp)]+" " + temp +"   ";
                        putout = putout + zhan[j] + " "+table[getid(zhan[j]), getid(op)]+" " + op + "\r\n";

                        arr = null;
                        for (m = j + 1; m <= k; m++)//归约
                        {
                            arr = arr + zhan[m];
                            zhan[m] = ' ';
                        }
                        
                        zhan[j + 1] = 'N';
                        putout = putout + "  将 " + arr + " 归约为 "+zhan [j+1];
                        arr = null;
                        for (s = 0; s <= j + 1; s++)
                            arr = arr + zhan[s];
                        putout = putout + "       栈的内容为" + arr + "\r\n";
                        k = j + 1;
                    }

                    if (table[getid(zhan[j]), getid(temp)] == '<' || table[getid(zhan[j]), getid(temp)] == '=')
                    {
                        k = k + 1;
                        zhan[k] = temp;          //入栈

                        putout = putout +"     "+zhan[j] + " "+table[getid(zhan[j]), getid(temp)]+" " + temp + "\r\n";

                        putout = putout + "     "+zhan[k] + " 入栈        ";
                        arr=null;
                        for (s = 0; s <= k; s++)
                            arr = arr + zhan[s];
                        putout = putout + "   栈的内容为:" + arr + "\r\n\r\n";
                    }
                    else
                    {
                        TOut.Text = "出错";
                        break;
                    }

                    i++;

                } while (Arrayget[i] != '!');

                
                if (find == 0)
                    TOut.Text = null;
                else
                {
                    if (arr != "#N#")
                        TOut.Text = putout + "分析失败";
                    else
                        TOut.Text = putout + "分析成功";
                }
            }
        }

        private void Bopen_Click(object sender, EventArgs e)//用于测试的优先表
        {
            T1.Text = "+";
            T2.Text = "-";
            T3.Text = "*";
            T4.Text = "/";
            T5.Text = "(";
            T6.Text = ")";
            T7.Text = "i";
            T8.Text = "#";

            T9.Text = "+";
            T10.Text = "-";
            T11.Text = "*";
            T12.Text = "/";
            T13.Text = "(";
            T14.Text = ")";
            T15.Text = "i";
            T16.Text = "#";

            a11.Text = ">";
            a12.Text = ">";
            a13.Text = "<";
            a14.Text = "<";
            a15.Text = "<";
            a16.Text = ">";
            a17.Text = "<";
            a18.Text = ">";

            a21.Text = ">";
            a22.Text = ">";
            a23.Text = "<";
            a24.Text = "<";
            a25.Text = "<";
            a26.Text = ">";
            a27.Text = "<";
            a28.Text = ">";

            a31.Text = ">";
            a32.Text = ">";
            a33.Text = ">";
            a34.Text = ">";
            a35.Text = "<";
            a36.Text = ">";
            a37.Text = "<";
            a38.Text = ">";

            a41.Text = ">";
            a42.Text = ">";
            a43.Text = "<";
            a44.Text = "<";
            a45.Text = "<";
            a46.Text = ">";
            a47.Text = "<";
            a48.Text = ">";

            a51.Text = "<";
            a52.Text = "<";
            a53.Text = "<";
            a54.Text = "<";
            a55.Text = "<";
            a56.Text = "=";
            a57.Text = "<";
            a58.Text = "e";


            a61.Text = ">";
            a62.Text = ">";
            a63.Text = ">";
            a64.Text = ">";
            a65.Text = "e";
            a66.Text = ">";
            a67.Text = "e";
            a68.Text = ">";


            a71.Text = ">";
            a72.Text = ">";
            a73.Text = ">";
            a74.Text = ">";
            a75.Text = "e";
            a76.Text = ">";
            a77.Text = "e";
            a78.Text = ">";

            a81.Text = "<";
            a82.Text = "<";
            a83.Text = "<";
            a84.Text = "<";
            a85.Text = "<";
            a86.Text = "e";
            a87.Text = "<";
            a88.Text = "=";
        }

        private void juzi1_Click(object sender, EventArgs e)
        {
            Code.Text = "i*(i-(i+i)/i)";
        }

        private void juzi2_Click(object sender, EventArgs e)
        {
            Code.Text = "((i)))";
        }

        private void clear_Click(object sender, EventArgs e)//清空所有
        {
            T1.Text = null;
            T2.Text = null;
            T3.Text = null;
            T4.Text = null;
            T5.Text = null;
            T6.Text = null;
            T7.Text = null;
            T8.Text = "#";

            T9.Text = null;
            T10.Text = null;
            T11.Text = null;
            T12.Text = null;
            T13.Text = null;
            T14.Text = null;
            T15.Text = null;
            T16.Text = "#";

            a11.Text = null;
            a12.Text = null;
            a13.Text = null;
            a14.Text = null;
            a15.Text = null;
            a16.Text = null;
            a17.Text = null;
            a18.Text = null;

            a21.Text = null;
            a22.Text = null;
            a23.Text = null;
            a24.Text = null;
            a25.Text = null;
            a26.Text = null;
            a27.Text = null;
            a28.Text = null;

            a31.Text = null;
            a32.Text = null;
            a33.Text = null;
            a34.Text = null;
            a35.Text = null;
            a36.Text = null;
            a37.Text = null;
            a38.Text = null;

            a41.Text = null;
            a42.Text = null;
            a43.Text = null;
            a44.Text = null;
            a45.Text = null;
            a46.Text = null;
            a47.Text = null;
            a48.Text = null;

            a51.Text = null;
            a52.Text = null;
            a53.Text = null;
            a54.Text = null;
            a55.Text = null;
            a56.Text = null;
            a57.Text = null;
            a58.Text = null;


            a61.Text = null;
            a62.Text = null;
            a63.Text = null;
            a64.Text = null;
            a65.Text = null;
            a66.Text = null;
            a67.Text = null;
            a68.Text = null;


            a71.Text = null;
            a72.Text = null;
            a73.Text = null;
            a74.Text = null;
            a75.Text = null;
            a76.Text = null;
            a77.Text = null;
            a78.Text = null;

            a81.Text = null;
            a82.Text = null;
            a83.Text = null;
            a84.Text = null;
            a85.Text = null;
            a86.Text = null;
            a87.Text = null;
            a88.Text = null;

            Code.Text = null;
            TOut.Text = null;
        }

        private void clearjuzi_Click(object sender, EventArgs e)//清空要分析的句子
        {
            Code.Text = null;
        }

        private void yufa_Load(object sender, EventArgs e)
        {

        }


    }
}