Home / Questions / 561535
Accepted
Jonathan
Asked: 2022-10-11 16:41:38 +0800 CST 2022-10-11 16:41:38 +0800 CST

How do I do this problem on arrays in python

  • 772

def datos_matriz ():
    print('Cuantos renglones quieres?')
    renglones=int(input())
    print('Cuantas columnas quieres?')
    columnas=int(input())
    matriz =  []
    for ren in range(renglones):
        lista=[]
        for col in range(columnas):
            print('Ingresa el dato para el renglon ',ren, 'y la columna ',col)
            dato=int(input())
            lista.append(dato)
        matriz.append(lista)
    return matriz

def mostrar_matriz(matriz):
    renglones=len(matriz)
    columnas=(len(matriz[0]))
    for ren in range(renglones):
        for col in range(columnas):
            print(matriz[ren][col], end =' ')
        print()
        
        
            
def main():
    mat=datos_matriz()
    mostrar_matriz(mat)

Write a function that receives an array as a parameter, given by the user in the main() function, and that returns the sum of all the elements of the array

I have this code to take an array based on user data and display the array.

enter image description here

python

1 Answers

  1. Best Answer

    You have practically done the function of adding the entire matrix, and it is very similar to mostrar_matriz(matriz), but instead of printing each element, you accumulate it in a sum variable and return it at the end.

    The above would solve your problem, however I saw in the edits that you also require the sum of xrow and ycolumn, in that case, you can build those 2 functions and use either one to sum the entire matrix.

    def sumar_fila(matriz, fila):
    suma = 0
    for elem in matriz[fila]:
        suma += elem
    return suma
    
def sumar_col(matriz, col):
    suma = 0
    for sublista in matriz:
        for i in range(len(sublista)):
            if i == col:
                suma += sublista[i]
    return suma
    
def sumar_matriz(matriz):
    suma = 0
    for i in range(len(matriz)):
        suma += sumar_fila(matriz, i)
    return suma

    And the main function would be:

    def main():
    mat=datos_matriz()
    mostrar_matriz(mat)
    fila = int(input("Que fila quieres sumar?: "))
    print(sumar_fila(mat, fila))
    col  = int(input("Que columna quieres sumar: "))
    print(sumar_col(mat, col))
    print("La suma de toda la matriz es: ")
    print(sumar_matriz(mat))
    • 0