By inc the i an j, I'm giving the dimension of the array until it reaches its max which is N^2 or am I incorrect?
No! You are creating an array of N^2 pointers to pointers to ints. So you have to store pointers to ints in the elements of the 1st dimension of the array (but you were storing ints there; not pointers to ints). And since (in a 64-bit programming environment) ints and pointers to ints are not the same size, storing an int in an area reserved for a pointer to an int might or might not work, but referencing the items stored in rows in the array as ints in check_property() will not reference the spots in which you stored them with your scanf() calls where you stored them in an object of type pointer to pointer to int. But you die before you get there because dereferencing vec[0][0] in scanf("%d", &vec[i][j]) uses vec[0] as a pointer, but you haven't initialized vec[0] yet, so you get a memory fault. And, if that location was a random value that points to a valid address, after you store an int there with your first scanf() call, dereferencing &vec[0][1] on the next call to scanf() will use the integer that you scanned on the first call as a pointer (but you stored an int there). The likelihood that the integer read in the 1st scanf() is a valid pointer is fairly low, and if it does happen to be valid, the likelihood that the integer value you stored in vet[0][0] is actually the address in memory of vec[0][0] is EXTREMELY unlikely. And it gets worse and worse as you scan more integers into the pointers to integers allocated for vec[].
So, if you want to use a doubly dimensioned array the following code tries to do what I think you were trying to do. Here are a few notes concerning the following code:
If you want to use a doubly dimensioned array, you have to create a doubly dimensioned array. In other words, vec in your code needs to be allocated as an array of N pointers to arrays of integers and each element of vec[] needs to be allocated as a pointer to an array of N integers.
I made several stylistic changes to fit my programming style.
I replaced the min() function with a macro.
I renamed the check() function PowerOf2() (and modified it to allow all non-negative integral powers of 2; not just positive integral powers of 2).
I added lots of debugging statements (trying to make sense of your comments about the check_property() function).
This User Gave Thanks to Don Cragun For This Post:
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