/// <summary>
/// 计算结果
/// </summary>
/// <returns></returns>
public float GetResult()
{
Console.ForegroundColor = ConsoleColor.Yellow;
float result = 0;
string a = "";
float top, topnext;
LinkStack <float> numbers = new LinkStack <float>();
foreach (char c in suffix)
{
if (char.IsDigit(c) || c == '.')
{
a += c;
}
else if (c == ' ' && a != "")
{
numbers.Push(float.Parse(a));
Console.WriteLine("传入了数" + a);
a = "";
}
if (c == '+')
{
top = numbers.Pop();
topnext = numbers.Pop();
float temp = topnext + top;
Console.WriteLine("加法运算结果 " + temp);
numbers.Push(temp);
}
else if (c == '-')
{
top = numbers.Pop();
topnext = numbers.Pop();
float temp = topnext - top;
Console.WriteLine("减法运算结果 " + temp);
numbers.Push(temp);
}
else if (c == '*')
{
top = numbers.Pop();
topnext = numbers.Pop();
float temp = topnext * top;
Console.WriteLine("乘法运算结果 " + temp);
numbers.Push(temp);
}
else if (c == '/')
{
top = numbers.Pop();
topnext = numbers.Pop();
float temp = topnext / top;
Console.WriteLine("除法运算结果 " + temp);
numbers.Push(temp);
}
}
result = numbers.Pop();
numbers.Clear();
Console.ForegroundColor = ConsoleColor.White;
return((float)Math.Round(result, 4));
}
/// <summary>
/// 数学符号判断与检测
/// </summary>
/// <param name="item"></param>
private void AddSign(String item)
{
item = item == "÷" ? "/" : item; //统一规定为 / 符号
string top = item;
string topnext = string.Empty;
if (buffer.IsEmpty())
{
buffer.Push(item);
return;
}
else
{
topnext = buffer.GetByID(1);
}
if (top == "=")
{
return;
}
if (top == ")")
{
Console.WriteLine("触发事件！遇到 ) 符号"); // 测试数据 (111+222+333)+12345
string sign = buffer.Pop();
while (sign != "(")
{
suffix += sign + " ";
sign = buffer.Pop();
}
return;
}
if (Regex.IsMatch(top, @"[+-]") && Regex.IsMatch(topnext, @"[/*]"))
{
Console.WriteLine("触发事件！top " + top + " topnext " + topnext);
while (!buffer.IsEmpty())
{
string sign = buffer.Pop();
suffix += sign + " ";
}
buffer.Push(item);
}
else
{
buffer.Push(item);
}
}
static void Main(string[] args)
{
//Stack<char> stack = new Stack<char>();
//IStackDS<char> stack = new SeqStack<char>(30);
IStackDS <char> stack = new LinkStack <char>();
stack.Push('a');
stack.Push('b');
stack.Push('c');
Console.WriteLine("push a b c 之后的数据个数为：" + stack.Count);
char temp = stack.Pop();
Console.WriteLine("pop之后得到的数据是：" + temp);
Console.WriteLine("pop之后，栈中数据的个数是：" + stack.Count);
char temp2 = stack.Peek();
Console.WriteLine("peek之后得到的数据是：" + temp2);
Console.WriteLine("peek之后，栈中数据的个数是：" + stack.Count);
stack.Clear();
Console.WriteLine("clear之后栈中数据的个数：" + stack.Count);
Console.ReadKey();
}