bool Expression::Compute(mycomplex& com)
{
if(CheckParenthesis(m_strExp) == false)
{
m_strError = "括号不匹配";
return false;
}
if(CheckOperatorPos(m_strExp) == false)
{
m_strError = "操作符不对应";
return false;
}
if(CheckDotPos(m_strExp) == false)
{
m_strError = "小数点没有填写对";
return false;
}
m_strScanDouble = ConvertDouble(m_strExp);
if(m_strScanDouble == "error")
{
m_strError = "数字输入错误";
return false;
}
m_strScanComplex = ConvertComplex(m_strScanDouble);
if(CheckImageFlag(m_strScanComplex) == false)
{
m_strError = "输入复数格式错误";
return false;
}
m_strInfix = ConvertDoubleToComplex(m_strScanComplex);
m_vecInfix = ConvertStringToInfix(m_strInfix);
m_vecPostfix = ConvertInfixToPostfix(m_vecInfix);
string str("");
com = Compute2(m_vecPostfix, str);
if(str == "error")
{
m_strError = "输入表达式错误";
return false;
}
return true;
}
long double Calculation::Resolve(const string& str) const
throw(invalid_argument)
{
if (!CheckParenthesis(str))
throw invalid_argument("The number of left parenthesis is not equal with"
" the number of right parenthesis");
/*
* TODO
* To test special cases.
* 5 + * 2
* 5 + 2 *
* * 5 + 2
*
* 5 (2 + 3)
* (2 + 3) 5
*
* 5 2 * 3
* 5 sin(90)
*
* sin(90) cos(90)
* sin 90 cos(45)
*
* To test if there are the functions that are called.
*/
Lexer l;
list<Token*> tokens = l.Split(str);
long double r;
if (l.PrintErrors())
{
throw invalid_argument("Invalid input");
}
if (tokens.size() == 0)
{
throw invalid_argument("No tokens");
}
AddZero(tokens);
try
{
r = Resolve(tokens);
for (auto it = tokens.begin(); it != tokens.end(); ++it)
delete (*it);
return r;
}
catch (invalid_argument& e)
{
for (auto it = tokens.begin(); it != tokens.end(); ++it)
delete (*it);
throw e;
}
}