//多项式的综合运算
public bool Multinomial_Compute(out MultinomialC out1)
{
out1 = null;
if (Fm.Length == 0)
{
Error = "括号中无内容";
return false;
}
if (Fm[0] == '-')
{
try
{
S_Number.PushStack(new MultinomialC());
}
catch (Exception)
{
Error = "内存空间不足";
return false;
}
}
while (Seek < Fm.Length)
{
if (IsOperator(Fm[Seek]))
{
if (!Operator_Compute(Fm[Seek++]))
return false;
}
else if (IsNumber(Fm[Seek]) || IsLetter(Fm[Seek]))
{
if (Seek > 0 && Fm[Seek - 1] == ')')
if (!Operator_Compute('*'))
return false;
Double d = 1;
if (IsNumber(Fm[Seek]))
{
String s;
if (!Cut_Double2(out s))
return false;
d = Double.Parse(s);
}
if (Seek < Fm.Length && IsLetter(Fm[Seek]))
{
MultinomialB b;
if (!ConstructMultinomialB(out b))
return false;
b.coefficient = d;
try
{
S_Number.PushStack(new MultinomialC(b));
}
catch (Exception)
{
Error = "内存空间不足";
return false;
}
}
else
{
try
{
S_Number.PushStack(new MultinomialC(new MultinomialB(d)));
}
catch (Exception)
{
Error = "内存空间不足";
return false;
}
}
}
else if (Fm[Seek] == '(')
{
if (Seek > 0)
{
if (IsNumber(Fm[Seek - 1]) || IsLetter(Fm[Seek - 1]) || Fm[Seek - 1] == ')')
{
if (!Operator_Compute('*'))
return false;
}
}
String s = Cut_Bracket();
Formula f;
Double d;
try
{
f = new Formula(s, 0);
if (f.Number_Compute(out d))
S_Number.PushStack(new MultinomialC(new MultinomialB(d)));
else
{
MultinomialC c = new MultinomialC(s);
if (!c.Multinomial_Compute(out c))
return false;
S_Number.PushStack(c);
}
}
catch (Exception)
{
Error = "内存空间不足";
return false;
}
}
else if (IsESC(Fm[Seek]))
Seek++;
else
{
Error = "存在非法字符：\"" + Fm[Seek] + "\"";
return false;
}
}
Object data;
if (!S_Number.PopStack(out data))
{
Error = "存在多余的运算符";
return false;
}
out1 = (MultinomialC)data;
Object O;
while (S_Operator.PopStack(out O))
{
if (!S_Number.PopStack(out data))
{
Error = "存在多余的运算符";
return false;
}
if (!Cell_Compute((Char)O, (MultinomialC)data, out1, out out1))
return false;
}
if (!S_Number.IsEmpty())
{
Error = "缺少运算符";
return false;
}
for (int i = 0; i < out1.count; i++)
if (Double.IsInfinity(out1.Buf[i].coefficient))
{
Error = "数值太大，已溢出";
return false;
}
return true;
}
//带括号检查、括号替换和出错信息输出功能的多项式综合运算
public static bool Multinomial_Compute(String si, out String out1)
{
out1 = "";
if (si.Length == 0)
{
MessageBox.Show("请输入一个算式", "无法计算", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return false;
}
Formula f;
try
{
f = new Formula(si, 0);
}
catch (Exception)
{
Error = "内存空间不足";
return false;
}
if (!f.Check_Bracket())
{
MessageBox.Show("多项式非法：\n\n" + Error, "无法计算", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return false;
}
f.Formula_Adjust();
Double d;
if (f.Number_Compute(out d))
{
out1 = Formula.Number_Adjust(d);
return true;
}
MultinomialC c;
try
{
c = new MultinomialC(f.formula);
}
catch (Exception)
{
Error = "内存空间不足";
return false;
}
Error = null;
if (!c.Multinomial_Compute(out c))
{
if (Error == null)
MessageBox.Show("多项式非法", "无法计算", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
else
MessageBox.Show("多项式非法：\n\n" + Error, "无法计算", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return false;
}
out1 = c.ToString();
return true;
}
