Bingo.cpp

#include<iostream>
using namespace std;
    //Initialize a multi dimensional array for card.
    string card[6][5] = {
           {"B", "I", "N", "G", "O"},
           {"0", "0", "0", "0", "0"},
           {"0", "0", "0", "0", "0"},
           {"0", "0", "Free", "0", "0"},
           {"0", "0", "0", "0", "0"},
           {"0", "0", "0", "0", "0"}
           };

//Method to print card on screen
void printCard(){

    for(int row = 0; row < 6; row++){
        for(int col = 0; col < 5; col++){
                cout << "\t" << card[row][col];
        }
        cout << endl;
    }

}

//Method to generate random integer with range [min, max]
int random(int min, int max)
{
   static bool first = true;
   if ( first )
   {
      srand(time(NULL));
      first = false;
   }
   return min + rand() % (max - min);
}

int main(){
    //sentinel value for retain / generate
    string repeat = "y";

    while(repeat == "y"){
        //loop from top to bottom , starting from 2nd row
        for(int col = 0; col < 5; col++){
            for(int row = 1; row < 6; row++){
                if(row == 3 && col == 2)                    //This is for FREE , i want to go to the next loop if the row = 3 and col = 2 *starting from 0
                    continue;

                int number = random(  (col * 15) + 1   ,((col+1) * 15));        //Generate random number. ex

                //col = 0
                //col * 1 + 1 = 1 ==== minimum of first col
                //(col + 1) * 5 = 15 === maximum of first col ,
                // col till 4,

                //sentinel value for existence
                bool exist = false;
                for(int nrow = 1; nrow < 6; nrow++)
                {
                    if(nrow == 3 && col == 2)               //skip the middle free
                    continue;

                    if(number == stoi(card[nrow][col])){     //if generated num = other number , set sentinel val to true
                       exist = true;
                        break;
                    }
                }

                if(exist)                                   //if it exist , go back to the current row
                    row--;
                else
                    card[row][col] = to_string(number);     //set the number to the generatedrandom number
            }
        }
        printCard();                                        //print the card after generating it

        cout << "Do you want to generate again? [y / n]: ";     //ask the users if he / she wants to continue , if n, break the while loop.
        cin >> repeat;
    }
}