//数字检验
private static bool IsNum(string input)
{
input = input.Trim();
if (input[0] == '+' || input[0] == '-')
{
input = input.Remove(0, 1);
}
if (input.Split('.').Length > 2)
{
var e = new BasicCalculatorException("多于一个的小数点！");
throw e;
}
foreach (var c in input)
{
if (c == '.')
{
continue;
}
if (!Char.IsNumber(c))
{
var e = new BasicCalculatorException("存在非数字！");
throw e;
}
}
return(true);
}
public static float InterpretInput(string input)
{
try
{
IsNum(input);
return((float)Convert.ToDecimal(input));
}
catch (System.FormatException e)
{
BasicCalculatorException et = new BasicCalculatorException("存在非数字！(来自报错System.FormatException）");
throw et;
}
}
public List <float> GetRoot()
{
//判别式你
float delta = FictionB * FictionB - 4 * FictionA * FictionC;
//判别式小于零，无解
if (delta < 0)
{
BasicCalculatorException e = new BasicCalculatorException("二次方程无解！");
throw e;
}
this.Result.Add(((-FictionB) + (float)Math.Sqrt(delta)) / (2 * FictionC));
//判别式大于零，两个解
if (delta > 0)
{
this.Result.Add(((-FictionB) - (float)Math.Sqrt(delta)) / (2 * FictionC));
}
return(Result);
}
