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Martin Flores
Asked: 2022-10-18 20:30:56 +0800 CST 2022-10-18 20:30:56 +0800 CST

How to put numerical values ​​to a matrix that expands, that is, 2x2, 4x4 and so on?

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Hello, I am trying to put numerical values ​​in a table-matrix where, when it is 4x4, 6x6 or 8x8, the user puts the corresponding queens in positions that one wants (according to the expansion or growth, if he wants it to be 4x4, he can only put 4 with 6x6 put 6) that they are seen with the 'X' symbol in the boxes you want and the rest of the boxes are considered 0 and that it is not using the random function in a random way that it is as the user puts it I don't know if can as it is written in the function or it has to be one by one. This is the code I am using:

import random
# <============================== functions ==============================> #
# it will create a initial state of queens for us :
Reyna= int(input("Cuantas Reinas desea Usar(Solo se aceptan Numeros Pares no Impares) "))
def randomRestart():
columnList = [0] * Reyna
for col in range(Reyna):
    columnList[col] = random.randint(1, Reyna)
return columnList

def printBoard(columnList):
for row in range(Reyna, 0, -1):
    for col in range(Reyna):
        if columnList[col] == row:
            print("X", end="  ")
        else:
            print(0, end="  ")
    print()

queensPositions = randomRestart()
print("Posicion de Columnas de Las Reinas : ", queensPositions)
print("Posicion Inicial de las Reinas: ")
print('\n***********************\n')
printBoard(queensPositions)
print('\n***********************\n')
print("==========================================================================")

This is the result it gives with the random function: enter image description here

python

1 Answers

  1. Best Answer

    If I understand correctly what you want then one loop forshould be enough to fill the board.

    print("se genrará un tablero de nxn de acuerdo al número de reynas que ingrese")
num_reynas = int(input("Ingrese el número de reinas"))

#generamos una matriz n por n usando una list comprehesion
tablero = [[0]*num_reynas for _ in range(num_reynas)]

    In the previous code we only ask the user to enter the number of queens and we generate a matrix that will correctly represent the board, for this we use a list compression which is an abbreviated way of writing a cycle for.

    The next step is to use a loop forto ask the user to enter the positions they want the queens to go on the board.

    print("Coloque las reinas en las posiciones")
for _ in range(num_reynas):
    fila = int(input("Ingrese la fila"))
    columna = int(input("Ingrese la columna"))

    tablero[fila][columna] = "X"

    With the previous code we ask you to enter the row and column where you want the queen to go, in that position we place the X, this will be repeated according to the number of queens that the user has entered. That cycle still needs to validate if the position is correct, but I'll leave that to you.

    As you mentioned in the comments that you wanted to save the number of the column where the queens are located, so all we have to do is save the variable columnathat is in the for loop in another list, it would be something like this:

    columnas_reynas = []

print("Coloque las reinas en las posiciones")
for _ in range(num_reynas):
    fila = int(input("Ingrese la fila"))
    columna = int(input("Ingrese la columna"))

    tablero[fila][columna] = "X"
    columnas_reynas.append(columna)

    An observation, if 2 queens are placed in the same column then the list columnas_reynaswill have duplicate data, if you will use the list later and you do not need duplicates then you can do columnas_reynas = list(set(columnas_reynas)), what it does setis eliminate duplicates. Or if you think it's better you can save the position xand ythe queen, doing columnas_reynas.append((fila, columna))so and you will have a list of tuples. If you have any questions, leave them in the comments :D.

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