public static DollarEquation Calc(List <string> list)
{
var stack = new Stack <DollarEquation>();
foreach (string s in list)
{
if (int.TryParse(s, out int i))
{
DollarEquation o = new DollarEquation {
C = i
};
stack.Push(o);
}
else if (s.Contains("x"))
{
DollarEquation o;
if (s.Contains("x*x") || s.Contains("x^2"))
{
o = new DollarEquation {
A = int.Parse(s.Replace("x*x", "").Replace("x^2", ""))
};
}
else
{
o = new DollarEquation {
B = int.Parse(s.Replace("x", ""))
};
}
stack.Push(o);
}
else
{
switch (s)
{
case "+":
stack.Push(stack.Pop() + stack.Pop());
break;
case "-":
stack.Push(stack.Pop() - stack.Pop());
break;
case "*":
stack.Push(stack.Pop() * stack.Pop());
break;
case "/":
stack.Push(stack.Pop() / stack.Pop());
break;
case "%":
stack.Push(stack.Pop() % stack.Pop());
break;
}
}
}
return(stack.Pop());
}
public static DollarEquation operator -(DollarEquation b, DollarEquation a)
{
DollarEquation o = new DollarEquation
{
A = a.A - b.A,
B = a.B - b.B,
C = a.C - b.C
};
return(o);
}
public static DollarEquation operator +(DollarEquation b, DollarEquation a)
{
DollarEquation o = new DollarEquation
{
A = a.A + b.A,
B = a.B + b.B,
C = a.C + b.C
};
return(o);
}
public static DollarEquation operator *(DollarEquation b, DollarEquation a)
{
DollarEquation o = new DollarEquation();
// one dollar equation
if (a.A == 0 && b.A == 0)
{
o.A = a.B * b.B;
o.B = a.B * b.C + a.C * b.B;
o.C = a.C * b.C;
}
return(o);
}
public static DollarEquation operator %(DollarEquation b, DollarEquation a)
{
DollarEquation o = new DollarEquation();
// 1 % 3
if (a.A == 0 && a.B == 0 && b.A == 0 && b.B == 0)
{
if (b.C == 0)
{
throw new Exception("除数不能为0");
}
else
{
o.C = a.C % b.C;
}
}
return(o);
}
public static DollarEquation operator /(DollarEquation b, DollarEquation a)
{
DollarEquation o = new DollarEquation();
if (a.A == 0 && b.A == 0)
{
// 1 / 0
if (b.B == 0 && b.C == 0)
{
throw new Exception("除数不能为0");
}
// 1x / 2
// B = 1, C = 0
// B = 0, C = 2
else if (a.C == 0 && b.B == 0.0 && b.C != 0)
{
o.B = a.B / b.C;
}
// 1 / 2x
// B = 0, C = 1
// B = 2, C = 0
else if (a.B == 0 && b.C == 0 && b.B != 0)
{
o.B = a.C / b.B;
}
// 1 / 2
// B = 0, C = 1
// B = 0, C = 2
else if (a.B == 0 && b.B == 0 && b.C != 0)
{
o.C = a.C / b.C;
}
// 1x / 2x
// B = 1, C = 0
// B = 2, C = 0
else if (a.C == 0 && b.C == 0 && b.B != 0)
{
o.C = a.B / b.B;
}
}
return(o);
}
