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/// <summary>
/// Solve user expression, may throw Calc.SyntaxException,
/// Calc.CommandException, Calc.EngineException.</summary>
/// <param name="_sExpr">user expression</param>
/// <param name="_Answer">user answer holder, where
/// solved expression result is placed</param>
public void Solve(string _sExpr, ref CNumber _Answer)
{// void expression equals to void result
if (_sExpr == null || _sExpr == "")
{
return;
}
_sExpr = _sExpr.Replace(" ", "").ToLower(); // simplify
CatchCommand(_sExpr); // if command - execute
// reinit & assimilate template number properties
m_block.Init(_Answer);
// `m_result` will like the caller answer holder and will take
// a part in temporary calculations through `Parts_Solve` and
// Parse_to_Blocks;
m_result = new CNumber("0", _Answer);
try
{
Parse_to_Blocks(_sExpr);
}
catch (ServiceException xcp)
{
ASSERT(false, xcp.Message, "Solve.conversion");
}
Parts_Solve(m_block);
// set user answer holder and common answer registry to
// a newly solved value
_Answer = m_block[0].Number;
m_reg.ANSWER.GetProperties(_Answer);
m_reg.ANSWER = _Answer;
return;
}
/// <summary>
/// Create and return the sub-copy of the current object</summary>
/// <param name="_from">from index in current object</param>
/// <param name="_to">to index in current object</param>
public CBlock Projection(int _from, int _to)
{
CBlock block = new CBlock();
block.Init(m_NumEtalon);
for (int i = _from; i <= _to; i++)
{
if (this[i].IsOperator)
{
block.BaseAdd(null, this[i].Operator);
}
else if (this[i].IsNumber)
{
block.BaseAdd(null, this[i].Number);
}
}
return(block);
}
