private void CLall_Click(object sender, EventArgs e)
{
txtCurrent.Clear();
first = second = answer = 0;
equation.Text = "";
function = "";
head = null;
current = null;
}
private void Form1_Load(object sender, EventArgs e)
{
equation.Text = "";
head = null;
current = head;
this.KeyPreview = true;
equal.Focus();
equal.Select();
}
private void PrintList()
{
cel print = head;
string temp = "";
while (print != null)
{
if (print.n)
{
temp = temp + print.number;
}
else
{
temp = temp + print.symbol;
}
print = print.next;
}
equation.Text = temp;
}
private void Sub()
{
cel s = head;
cel temp;
while (s.symbol != "=")
{
if (s.next.symbol == "-")
{
double answer = s.number - s.next.next.number;
temp = s.next.next.next;
s.next = temp;
s.number = answer;
}
else
{
s = s.next;
}
}
}
private void Add()
{
cel a = head;
cel temp;
while (a.symbol != "=")
{
if (a.next.symbol == "+")
{
double answer = a.number + a.next.next.number;
temp = a.next.next.next;
a.next = temp;
a.number = answer;
}
else
{
a = a.next;
}
}
}
private void Divide()
{
cel d = head;
cel temp;
while (d.symbol != "=")
{
if (d.next.symbol == "÷")
{
double answer = d.number / d.next.next.number;
temp = d.next.next.next;
d.next = temp;
d.number = answer;
}
else
{
d = d.next;
}
}
}
private void Multiply()
{
cel m = head;
cel temp;
while (m.symbol != "=")
{
if (m.next.symbol == "x")
{
double answer = m.number * m.next.next.number;
temp = m.next.next.next;
m.next = temp;
m.number = answer;
}
else
{
m = m.next;
}
}
}
private void AddToList(string s)
{
if (Double.TryParse(txtCurrent.Text, out first))
{
if (head == null)
{
head = new cel();
current = head;
current.number = first;
current.n = true;
current.next = new cel();
current = current.next;
current.symbol = s;
current.n = false;
current.next = null;
}
else
{
current.next = new cel();
current = current.next;
current.number = first;
current.n = true;
current.next = new cel();
current = current.next;
current.symbol = s;
current.n = false;
current.next = null;
}
}
else
{
equation.Text = "ERROR";
txtCurrent.Clear();
}
}
