matrix_cdio&&remove

#include <stdio.h>
#include <stdlib.h>

typedef int* arr_t;
typedef arr_t* matr_t;

matr_t matrix_create(matr_t matrix, int row, int col)
{
    matrix = malloc(sizeof(arr_t) * row);
    for(int i = 0; i < row; i++)
        *(matrix + i) = malloc(sizeof(int) * col);

    return matrix;
}

matr_t matrix_input(matr_t matrix, int row, int col)
{
    for(int i = 0; i < row; i++)
        for(int j = 0; j < col; j++)
            scanf("%d", (*(matrix + i)) + j);

    return matrix;
}

void matrix_out(matr_t matrix, int row, int col)
{
    for(int i = 0; i < row; i++)
    {
        for(int j = 0; j < col; j++)
            printf("%d ", *(*(matrix + i) + j));
        printf("\n");
    }
}

void matrix_delete(matr_t matrix, int row, int col)
{
    for(int i = 0; i < row; i++)
    {
        free(*(matrix + i));
    }
    free(matrix);

    return;
}

matr_t matrix_remove_col(matr_t matrix, int *row, int col, int row_to_remove)
{
    free(*(matrix + row_to_remove));
    for(int i = row_to_remove; i < (*row) - 1; i++)
    {
        *(matrix + i) = *(matrix + i + 1);
    }
    (*row)--;

    return matrix;
}