Bappy sir 3rd assignment

#include <iostream>
#include <cstdio>
#include <string>
#include <cstring>
using namespace std;
#define MAXSIZE 100
char number[MAXSIZE];
int top=-1;

void Push(char x){

    if(top == MAXSIZE -1){
        cout<<"Error: Overflow !"<<endl;
        return;
    }

    number[++top] = x;

}

void Pop(){

    if(top == -1)
    cout<<"Error:Underflow."<<endl;

    else
        top--;

}

char Top(){

    //printf("%d\n", number[top]);

    return number[top];
}


void Print(){

    for(int i=0; i<=top; i++){

        cout<<number[i]<<" ";
        }
    cout<<endl;

    }
bool isEmpty(){

    if(top == -1)
        return false;
    else
    return true;

}


int main(int argc, char **argv)
{
    string expression;
    char ch, cTop;
    cin>>expression;

    for(int i=0; i<expression.size(); i++){

        ch = expression[i];

    if(ch == '(' || ch == '{' || ch == '['){

            Push(ch);

        }
    else if(ch == ')' || ch == '}' || ch == ']'){

            cTop = Top();

            if(ch == ')' && cTop == '(')
                Pop();
            else if(ch == '}' && cTop == '{')
                Pop();
            else if(ch == ']' && cTop == '[')
                Pop();
            else

                Push(ch);

        }
    }

    bool check;

    check = isEmpty();

    ch = Top();

    if(check == false)
        cout<<"Ballanced"<<endl;

    else if(top>1)
        cout<<"Unmatched"<<endl;
    else if(ch =='(' || ch =='{' || ch =='[')
        cout<<"Opening bracket overflow"<<endl;
    else
        cout<<"Closing bracket overflow"<<endl;



    return 0;
}