Thread: I need help

Here's my new code and it works but doesn't do what I want it to do. I want it to display matched symbols founds when use properly and unmatched when not.

Code:

#include <iostream>
using namespace std;

const int DefaultListSize = 50;
typedef char Elem;

class Astack 
{
private:
	int top;	/*Index for top element*/
	int size;	/*Maximum size of stack*/
	Elem*listArray;	/*Array holding stack elements*/
public:	
		Astack(int sz =DefaultListSize)	/*Constructor*/
		{size = sz; top = 0; listArray = new Elem[sz];}
		~Astack() { delete [] listArray;}	/*Destructor*/
		void clear() {top = 0;}
		bool push(const Elem& item){
			if(top == size) return false;	/* Stack is full*/
			else {listArray [top++] = item;
				return true;
			}
		}
		bool pop(Elem& item){	/*Pop top element*/
			if(top == 0) return false;
			else {item = listArray[--top]; 
				return true;
			}
		}
		bool topValue(Elem& item) const {	/*Return top element*/
			if (top == 0) return false;
			else {item = listArray[top - 1];
			return true;
			}
		}
		int length() const {return top;}
		bool IsEmpty() const {if(top == 0) return true;
		else return false;
		}
	};
int main(){
	
	Astack S;
	char s;

cout <<"Enter data:";
cin >> s;

while(s != '#'){
	if(s == '(' || s == '[' || s == '{'){
		S.push(s);
	}
	else
		cin.ignore(s);

	if(s == ')' || s == ']' || s == '}'){
		cout << S.pop(s);
	}

	if(S.IsEmpty())
		cout << "The expression has only matching grouping symbols" << endl;
	else
		cout << "The expression has some unmatched grouping symbols" << endl;
}
return 0;
}