C++ 判断括号匹配

#include
#include
#include
using namespace std;
class Test
{
private:
	string str;
	stackst;
public:
	Test(string str);
	bool Judge();
};
int main()
{
	while (1) {
	
		string temp;
		cin >> temp;
		Test A(temp);
		cout << A.Judge()<
	this->str = str;
}
bool Test::Judge()
{
	for (int i = 0; i < str.length(); i++)
	{
		if (str[i] == '(' || str[i] == '[' || str[i] == '{')
		{
			st.push(str[i]);
		}
		else
		{
			if (st.empty())
				return 0;
			char ch = st.top();
			if (ch == ')' && str[i] != '(')
				return 0;
			if (ch == '}' && str[i] != '{')
				return 0;
			if (ch == ']' && str[i] != '[')
				return 0;
			st.pop();
		}
	}

	return st.empty();
}