Like a maze from a text file to display in a two-dimensional array?

for(j=5;j>=1;j--) for(i=1;i<=6;i++) scanf("%i",&array[i][j]); 

Something like that.

Don't understand why you can't just read the file as usual?

If we know beforehand the size of the maze (or can read), then you just need to record the address of matrix[n – i – 1][j] (can be added to each index unit to the numbering went from 1, but then the memory need to allocate more of — (n + 1) * (m + 1)).
\r
If the size of the matrix is unknown in advance, and to determine its dimension we need in the process of reading, it is better, I think, to read the matrix as usual, and then wrap it in a class with get and set methods (or, if the language allows you to set the getters and setters), which already produce the necessary offset based on the size of the matrix to be stored in the same class.