public static double Multiply()
{
double operand1 = ReciveOperands("Operand1");
double operand2 = ReciveOperands("Operand2");
OperatorsFactory multiplyFactory = new MultiplyFactory();
Operator multiplyOperator = multiplyFactory.Create();
return(multiplyOperator.Calculate(operand1, operand2));
}
public string Multiply(double numberA, double numberB)
{
IOperatorFactory multiply = new MultiplyFactory();
Operator multiplyOperator = multiply.CreareOperator();
multiplyOperator.NumberA = numberA;
multiplyOperator.NumberB = numberB;
return(multiplyOperator.GetResult().ToString());
}
public string GetResult()
{
string[] str = expression.Split(new char[4] {
'+', '-', '/', '*'
});
string result = null;
if (str.Length == 1)
{
return(Convert.ToDouble(str[0]).ToString());
}
else
{
//第一个数带符号问题
if (str.Length == 3)
{
str[0] = "-" + str[1];
str[1] = str[2];
}
char c = expression.ToCharArray()[expression.IndexOf(str[0]) + str[0].Length];
//string pattern = @"^-?\d+$";//判断整数?
//Regex regex = new Regex(pattern);
switch (c)
{
case '+':
{
AdditionFactory additionFactory = new AdditionFactory();
Operation operateAddition = additionFactory.CreateAddition(str[0], str[1]);
result = operateAddition.GetResult();
break;
}
case '-':
{
SubtractionFactory subtractionFactory = new SubtractionFactory();
Operation operateSubtraction = subtractionFactory.CreateSubtraction(str[0], str[1]);
result = operateSubtraction.GetResult();
break;
}
case '*':
{
MultiplyFactory additionFactory = new MultiplyFactory();
Operation operateMultiply = additionFactory.CreateMultiply(str[0], str[1]);
result = operateMultiply.GetResult();
break;
}
case '/':
{
DivideFactory additionFactory = new DivideFactory();
Operation operateDivide = additionFactory.CreateDivide(str[0], str[1]);
result = operateDivide.GetResult();
break;
}
default: result = "error"; break;
}
}
return(result.ToString());
}
