How to access twodimensional array

Question

I have a graph, which is represented by a two-dimensional array:

int graph[9][9] = { {INFINITY, 4, INFINITY, INFINITY, INFINITY, INFINITY, INFINITY, 8, INFINITY},
                        {4, INFINITY, 8, INFINITY, INFINITY, INFINITY, INFINITY, 11, INFINITY},
                        {INFINITY, 8, INFINITY, 7, INFINITY, 4, INFINITY, INFINITY, 2},
                        {INFINITY, INFINITY, 7, INFINITY, 9, 14, INFINITY, INFINITY, INFINITY},
                        {INFINITY, INFINITY, INFINITY, 9, INFINITY, 10, INFINITY, INFINITY, INFINITY},
                        {INFINITY, INFINITY, 4, 14, 10, INFINITY, 2, INFINITY, INFINITY},
                        {INFINITY, INFINITY, INFINITY, INFINITY, INFINITY, 2, INFINITY, 1, 6},
                        {8, 11, INFINITY, INFINITY, INFINITY, INFINITY, 1, INFINITY, 7},
                        {INFINITY, INFINITY, 2, INFINITY, INFINITY, INFINITY, 6, 7, INFINITY} };

This graph is passed into my class as an int*pointer like this

dijkstra::dijkstra(int* grapharray, int number_nodes)
{
    this->grapharray = grapharray;
    this->number_nodes = number_nodes;
}

In order to access the array i have made a variable

int** graph=&grapharray;

which allows me to access

graph[0][2]
graph[0][5]

and so on but not

graph[1][7]

How can i access the graph in both dimensions?

You need to change the declaration of your function to dijkstra::dijkstra(int** grapharray — Roman2452809, Jul 18 '20 at 12:37
@Roman2452809 No. A 2D array does not decay to pointer-to-pointer. — cdhowie, Jul 18 '20 at 14:50
Since you tagged as C++, you may want to consider using `std::vector>`. It's easier to pass to functions. — Thomas Matthews, Jul 18 '20 at 17:07

How to access twodimensional array

0 Answers0