#include <iostream>
#include <fstream>
#include <cstdlib>


char itoc(int);
void readGrid(int[][8]);
void printGrid(int[][8]);
void checkOuts(int[][8]);
void transfers(int[][8]);
int ** getVacancies(int[][8]);
int getNumberOfVacancies(int[][8]);

int main()
{
    int beds[5][8];
    readGrid(beds);
    printGrid(beds);
    checkOuts(beds);
    transfers(beds);
    printGrid(beds);
    return 0;
}

char itoc(int val)
{
    switch(val)
    {
    case 0:
        return 'V';
        break;
    case 1:
        return 'C';
        break;
    case 2:
        return 'O';
        break;
    case 3:
        return 'W';
        break;
    case 4:
        return 'T';
        break;
    case 5:
        return 'X';
        break;
    }
}

void printGrid(int beds[][8])
{
    using std::cout;
    using std::endl;
    for(int i = 0; i < 5; i++)
    {
        for(int j = 0; j < 8; j++)
        {
            cout << itoc(beds[i][j]) << " ";
            if(j==7)
                cout << endl;
        }
    }
    cout << "\n";
}

void readGrid(int beds[][8])
{
    using std::fstream;
    using std::cout;
    using std::endl;
    using std::string;
    using std::ios;
    fstream infile("beds.txt", ios::in);
    string filetext;
    for(int i = 0; i < 5; i++)
    {
        for(int j = 0; j < 8; j++)
        {
            infile >> filetext;
            beds[i][j] = atoi(filetext.c_str());
        }
    }
    infile.close();
}

void checkOuts(int beds[][8])
{
    for(int * iter = &beds[0][0]; iter != &beds[0][0] + 8 * 5; iter++)
    {
        if(*iter == 1)
        {
            *iter = 0;
        }
    }
}

void transfers(int beds[][8])
{
    int *transfers[40];
    int transcounter = 0;
    int **vacancies = getVacancies(beds);
    for(int * iter = &beds[0][0]; iter != &beds[0][0] + 8 * 5; iter++)
    {
        if(*iter == 4)
        {
            transfers[transcounter] = iter;
            transcounter++;
            *iter = 0;
        }
    }
    for(int i = 0; i < transcounter; i++)
    {
        **(vacancies+i) = 2;
    }
}

int ** getVacancies(int beds[][8])
{
    int vaccounter = 0;
    for(int * iter = &beds[0][0]; iter != &beds[0][0] + 8 * 5; iter++)
    {
        if(*iter == 0)
        {
            vaccounter++;
        }
    }
    int *vacancies[vaccounter];
    vaccounter = 0;
    for(int * iter = &beds[5][8]; iter != &beds[0][0]; iter--)
    {
        if(*iter == 0)
        {
            vaccounter++;
            vacancies[vaccounter] = iter;
        }
    }
    return vacancies;
}

void newPatientInput(int beds[][8])
{
    using std::cout;
    cout << "Please enter the number of new patients";
}