public void IsDigit_KeyPad()
{
foreach (var cur in Enum.GetValues(typeof(VimKey)).Cast <VimKey>().Where(VimKeyUtil.IsKeypadNumberKey))
{
var keyInput = KeyInputUtil.VimKeyToKeyInput(cur);
Assert.True(keyInput.IsDigit);
Assert.True(keyInput.RawChar.IsSome());
Assert.True(CharUtil.IsDigit(keyInput.Char));
}
}
public static double postfix_evaluation(string postfix)
{
double result, op1, op2;
Stack <double> stack = new Stack <double>();
int len = (postfix.Length);
for (int i = 0; i < len; i++)
{
string x = ""; double read_x = 0; char c = ' ';
if (postfix[i] == ' ')
{
continue;
}
#region multidigit_check
//else if (char.IsDigit(postfix[i]))
//{
//int num = 0;
//while (char.IsDigit(postfix[i]))
//{
// num = num * 10 + (postfix[i] - '0');
// i++;
//}
//i--;
//stack.Push(num);
//}
#endregion
//If c is a number or decimal point
else if (CharUtil.IsDigit(c = postfix[i]))
{
x += c;
//The cycle reading includes a decimal point (for example, 8.88+7.777, here will be read in three times, the first cycle reads 8.88,
//the second time reads +, the third cycle reads 7.77)
while (i < len - 1 && CharUtil.IsDigit(c = postfix[++i]))
{
x += c;
}
//If any number contains ! replacing ! with - and then convert it into number
if (x.Contains("`"))
{
x = x.Replace("`", "-");
}
read_x = double.Parse(x);
//Read the data into the data stack
stack.Push(read_x);
}
else
{
op1 = stack.Pop();
try
{
op2 = stack.Pop();
}
catch (Exception)
{
op2 = 0;
}
switch (postfix[i])
{
case '+':
result = (double)(op2 + op1);
stack.Push(result);
break;
case '-':
result = (double)(op2 - op1);
stack.Push(result);
break;
case '*':
result = (double)(op2 * op1);
stack.Push(result);
break;
case '/':
if (op1 == 0)
{
throw new MathError();
}
result = (double)(op2 / op1);
stack.Push(result);
break;
case '^':
result = (double)(Math.Pow(op2, op1));
stack.Push(result);
break;
}
}
}
result = (double)stack.Pop();
return(result);
//Console.Write("\nAnswer:: " + result);
}