#include <iostream>
#include <string>
#include <stack>

using namespace std;

int main()
{
	char str[] ="{ @111000; < qwe > ![<{asd! }";
	cout<<"code: "<<str<<endl<<endl;

	stack<char> tags;
	
	char tgOpen[]  = "[<{";
	char tgClose[] = "]>}";

	char *ch;
	
	bool comment = false;
	
	for (int i=0; i<strlen(str); i++) {
		if (str[i]=='!')
			comment=!comment;
		
		if (!comment) {
			if ((ch = strchr(tgOpen, str[i]))!=NULL) {
				cout<<*ch<<endl;
				tags.push(*ch);
			}
			
			if ((ch = strchr(tgClose, str[i]))!=NULL) {
				cout<<*ch<<endl;
				if (!tags.empty()) {
					if (tgOpen[ch-tgClose] != tags.top())
						cout<<"tags error 1!"<<endl;
					tags.pop();
				} else {
					cout<<"tags error 2!"<<endl;
				}
			}
		}
	}
	
	if (!tags.empty()) {
		cout<<"tags error 3!"<<endl;
	}
	
	cout<<"comment: "<<comment<<endl;

	/*char* c = str;
	while (*c) {
		if (ch = *strchr(tgOpen, (char)*c)) {
			cout << ch << endl;
		}
		c++;
	}*/

	return 0;
}