如何解决为什么我的 C# 代码检查器方法总是返回 true?
我正在尝试编写一个程序,检查给定的 .txt 文件(包含C# 代码)是否具有有效括号。
当我粘贴这样的简单代码时:
if(true)
{
Console.WriteLine("Hello");
}
我的程序说它是有效的,这是真的。但是如果我删除一个括号,就像这样:
if(true)
{
Console.WriteLine("Hello");
它仍然说它有效。
这是我检查括号的方法:
static void CheckBrackets()
{
try
{
Console.Write("You file name (Default path is .....\\netcoreapp2.1\\): ");
Console.ForegroundColor = ConsoleColor.Blue;
string fileName = Console.ReadLine();
Stack openingBrackets = new Stack();
Queue closingBrackets = new Queue();
using (StreamReader reader = new StreamReader(fileName))
{
bool check = true;
string str = reader.ReadToEnd();
char[] code = str.tochararray();
foreach (char ch in code)
{
if(ch == '(' || ch == '[' || ch == '{')
{
openingBrackets.Push(ch);
}
else if(ch == ')' || ch == ']' || ch == '}')
{
closingBrackets.Enqueue(ch);
}
}
while (openingBrackets.Count == 0 && closingBrackets.Count == 0)
{
char currentopeningBracket = (char)openingBrackets.Pop();
char currentClosingBracket = (char)closingBrackets.Dequeue();
if ((currentopeningBracket == '(' && currentClosingBracket != ')')
|| (currentopeningBracket == '[' && currentClosingBracket != ']')
|| (currentopeningBracket == '{' && currentClosingBracket != '}'))
{
check = false;
}
}
if(check == true)
{
Console.WriteLine("Valid.");
}
else
{
Console.WriteLine("Not valid.");
}
}
}
catch (Exception exp)
{
...
}
}
为什么它不起作用的任何想法?
解决方法
您应该使用以下内容修改代码的 while
部分:
if (openingBrackets.Count != closingBrackets.Count)
{
check = false;
}
else
{
while (openingBrackets.Count > 0 && closingBrackets.Count > 0)
{
char currentOpeningBracket = (char)openingBrackets.Pop();
char currentClosingBracket = (char)closingBrackets.Dequeue();
if ((currentOpeningBracket == '(' && currentClosingBracket != ')')
|| (currentOpeningBracket == '[' && currentClosingBracket != ']')
|| (currentOpeningBracket == '{' && currentClosingBracket != '}'))
{
check = false;
}
}
}
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