CGXFormulaSheet::EvaluateExpression

BOOL EvaluateExpression(CString& sResult, CGXFormula& fm);

BOOL EvaluateExpression(CString& sResult, LPCTSTR pszFormula);

sResult

A CString where the function will return the result.

fm

A previously parsed binary representation of the formula. See ParseExpression.

pszFormula

Pointer to string with expression. The formula must start with an equal sign ('=').

Remarks

Parses and evaluates the given expression and returns the result as string.

Example:

a) Using a CGXFormula object

   CGXFormula fm;
   CString s;
   if (ParseExpression(_T("=sin(1)"), fm)
      && EvaluateExpression(s, fm))
   {
      TRACE(_T("sin(1) = %s"), s);
   }
   else
      {
      GetError(s);
      TRACE(_T("sin(1): Error - %s"), s);
      }

b) Not using a CGXFormula object

   if (EvaluateExpression(s, _T("=sin(1)")))
   {
      TRACE(_T("sin(1) = %s"), s);
   }
   else
      {
      GetError(s);
      TRACE(_T("sin(1): Error - %s"), s);
      }

See Also

 CGXFormulaSheet::ParseExpression

CGXFormulaSheet

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