Minefield, random bombs

Question

Minefield, random bombs

Asked 9 years, 1 month ago

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1

Good afternoon I’m having some trouble using the method random to try to appear only 10 bombs in my minefield, only that it appears without limits. someone knows where I am missing?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Camp
{
    class Program
    {

        static int[,] matriz = new int[10, 10];

        static void Main(string[] args)
        {
            PreencherMatriz();

        }

        static void Bomba()
        {
            Random rand = new Random();
            int linhaRand = 0;
            int colunaRand = 0;
            //bool minValue = false;
            bool maxValue = false;
            int bomba = 0;
            do
            {
            bomba ++;
            linhaRand = rand.Next(1, matriz.GetLength(0) - 1);
            colunaRand  = rand.Next(1, matriz.GetLength(1) - 1);
            if ( matriz[linhaRand, colunaRand] == '9')
            {
                maxValue = true;
            }
            }while(!maxValue && bomba <= 1);


            matriz[linhaRand, colunaRand] =0;
            LerMatriz();

            Bomba();


        }

        static void LerMatriz()
        {
            Console.Clear();
            for (int i = 0; i < matriz.GetLength(0); i++)
            {
                for (int j = 0; j < matriz.GetLength(1); j++)
                {
                    Console.Write("{0} ", matriz[i, j]);
                }
                Console.WriteLine("");
            }
        }

        static void PreencherMatriz()
        {
            for (int i = 0; i < matriz.GetLength(0); i++)
            {
                for (int j = 0; j < matriz.GetLength(1); j++)
                {
                    if(j == 0 || j == matriz.GetLength(1) - 1)
                    {
                        matriz[i, j] = 5;
                    }
                    else if(i == 0 || i == matriz.GetLength(0) - 1)
                    {
                        matriz[i, j] = 5;
                    }
                    else
                    {
                        matriz[i, j] = 9; 
                    }
                    Console.Write("{0} ", matriz[i, j]);
                }
                Console.WriteLine("");
            }
            Console.ReadKey();
            Bomba();
        }
    }
}

4

At the end of the function Bomba you are calling her again, which causes the code to run non-stop.

– carlosfigueira

2015/11/05 at 18:09
But your retreat there, it doesn’t work, what can I do? can you guide me pfv

– Rafael Soares

2015/11/05 at 18:10
As it was your teacher who passed you should study a little more and check what you are doing with your code debugging line to line mainly in your method Bomb me(); inside your 'if ( matrix[lineRand, columnRand] == 9)' you should change the value 9 for your 10.. tip.

– Marco Souza

2015/11/06 at 10:53
Obg by the tips of all able to run the code working perfectly.

– Rafael Soares

2015/11/07 at 14:29

1 answer

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by Christian Beregula • **1,512** points · Answer 1 · 2015-11-05T19:03:58+00:00

I don’t quite understand how your logic works, but the truth is, the problem is how you want to position the bombs. Your matrix when passing the method PreencherMatriz() exits with the following result:

5 5 5 5 5 5 5 5 5 5 
5 9 9 9 9 9 9 9 9 5 
5 9 9 9 9 9 9 9 9 5 
5 9 9 9 9 9 9 9 9 5 
5 9 9 9 9 9 9 9 9 5 
5 9 9 9 9 9 9 9 9 5 
5 9 9 9 9 9 9 9 9 5 
5 9 9 9 9 9 9 9 9 5 
5 9 9 9 9 9 9 9 9 5 
5 5 5 5 5 5 5 5 5 5

If he is responsible for the quantity of bombs inserted then there is the error, and has nothing to do with the Random.

And if the method Bomba is who should perform any modification in this matrix to mark the positions of the bombs, it is not assigning any value inside its loop that I imagine it would be there that should be counting how many bombs were inserted.

@Edit:

static void Bomba()
{
    Random rand = new Random();
    int linhaRand = 0;
    int colunaRand = 0;
    int bomba = 0;
    do
    {
        linhaRand = rand.Next(1, matriz.GetLength(0) - 1);
        colunaRand  = rand.Next(1, matriz.GetLength(1) - 1);
        if ( matriz[linhaRand, colunaRand] == '9')
        {
            //adotando que onde é 0 é bomba
            matriz[linhaRand, colunaRand] = 0;
            bomba ++;
        }
    }while(bomba < 10);
    LerMatriz();
}