OOP-Homework-08-10-15

//Задача за домашно по ООП (за 08.10.15): Създайте 2 стека за съхранение на символи като използвате следния клас стек...

//#include "stdafx.h"
#include <iostream>
using namespace std;
const int stSize = 10;
int k, arrNum;
char c;

class stack{
    char st[stSize]; //10 const
    int tos; //top of stack
public:
    void init();
    void push(char c);
    void pop();
    void disp();
};

void stack::init(){
    for (int i = 0; i <= stSize; i++){
        st[i] = 0;
    }
    tos = 0;
    k = 0;
}

void stack::disp(){
    for (int i = 1; i <= stSize; i++){
        cout << i << "[" << st[i] << "] ";
    }
    k = 0;
}

void stack::push(char c){

    for (int i = 1; i <= stSize+1; i++){
        if (i > stSize){
            cout << "Sorry, the array was full. Symbol not written.\n";
            break;
        }
        if (st[i] == NULL){
            st[i] = c;
            tos++;
            cout << "Symbol " << c << " successfully written to array.\n";
            break;
        }
    }
    k = 0;
}

void stack::pop(){
    int j;
    cout << "Which position do you want to release? Choices: 1-" << stSize << ": ";
    cin >> j;

    st[j] = 0;
    tos--;
    cout << "Symbol at " << j << " was removed from array.";
    k = 0;
}

void main(){
    stack arr1, arr2;
    do {
        cout << "\n*** Main Menu ***\n";

        cout << "1. Initialize\n";
        cout << "2. Display\n";
        cout << "3. Push a symbol\n";
        cout << "4. Pop a symbol\n";
        cout << "5. Exit\n";

        cout << "Please, select a number: ";
        cin >> k;
        if (k != 5){
            cout << "Please, select an array: ";
            cin >> arrNum;
        }

        switch (k){
        case 1: if (arrNum == 1) arr1.init(); else arr2.init(); break;
        case 2: if (arrNum == 1) arr1.disp(); else arr2.disp(); break;
        case 3: cout<< "Share a symbol, lad: ";
                cin >> c;
                if (arrNum == 1) arr1.push(c); else arr2.push(c);
                break;
        case 4: if (arrNum == 1) arr1.pop(); else arr2.pop(); break;
        case 5: system("exit"); break;
        }
    } while (k <= 0 || k >= 6);
}