public CalExpression(string Expression)
{
MyWords = new WordAnalyse(Expression);
bResult = false;
nResult = 0;
dResult = 0;
ValueType = -1;
}
protected void E(WordAnalyse pWords)
{
if (pWords.GetWord(WordIndex).CompareTo('(') == 0)
{
WordIndex++;
RoundBracketsi = RoundBracketsR + 1;
RoundBracketsR++;
// ValutStack.Push(RoundBracketsi);
//if (ValutStack.Get(ref itemp))
//MessageBox.Show(itemp+"");
ValutStack.Push(RoundBracketsi);
//if (ValutStack.Get(ref itemp))
//MessageBox.Show(itemp+"","2");
E(pWords);
// RoundBracketsi=ValutStack.Pop();
ValutStack.Pop(ref RoundBracketsi);
//if( ValutStack.Get( ref itemp))
// MessageBox.Show(itemp+"","3");
//else
// MessageBox.Show(0 + "", "33");
if (pWords.GetWord(WordIndex).CompareTo(')') == 0)
{
WordIndex++;
RoundBracketsL++;
E_(pWords);
}
else
{
MessageBox.Show("第" + RoundBracketsi + "个左括号缺少右括号", "右括号");
bResult = false;
return;
}
}
else
if (pWords.GetWordAttribute(WordIndex) != 2)
{
WordIndex++;
E_(pWords);
}
else
{
bResult = false;
return;
}
}
public bool ISIllegal(string Expression, bool ismess)
{
if (Expression.ToCharArray().Length >= 400)
{
MessageBox.Show("表达式太长");
return(false);
}
string ExpressionTemp = Expression + "#";
WordAnalyse MyWords = new WordAnalyse(ExpressionTemp);
MyWords.GetResult();
SyntaxAnalyse MySyntax = new SyntaxAnalyse();
if (!MySyntax.Analyse(MyWords) && ismess)
{
MessageBox.Show("语法错误");
return(false);
}
return(true);
}
protected void E_(WordAnalyse pWords)
{
//char tem[100] = "\0";
// strcpy(tem,Words.GetWord(WordIndex));
// char Operator = tem[0];
if (pWords.GetWord(WordIndex).CompareTo('+') == 0 ||
pWords.GetWord(WordIndex).CompareTo('-') == 0 ||
pWords.GetWord(WordIndex).CompareTo('*') == 0 ||
pWords.GetWord(WordIndex).CompareTo('^') == 0 ||
pWords.GetWord(WordIndex).CompareTo('/') == 0
)
{
WordIndex++;
E(pWords);
E_(pWords);
}
else
{
return;
}
}
public bool Analyse(WordAnalyse pWords)
{
if (pWords.GetResult() == false)
{
return(false);
}
E(pWords);
if (WordIndex < pWords.GetWordNum() - 1)
{
if (pWords.GetWord(WordIndex).CompareTo(')') == 0)
{
MessageBox.Show("第" + (RoundBracketsL + 1) + "个右括号缺少左括号", "缺少左括号");
}
bResult = true;
WordIndex = 0;
return(false);
}
bool tem = bResult;
bResult = true;
WordIndex = 0;
return(tem);
}