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In C++, when using a pointer to multidimensional array like,
int arr[2][5];
int (*p)[5] = arr;
How does a int* is different from the one with size i.e. int (*)[5]?
Pointers are always the same size for any particular machine (virtual, or otherwise). On a 32-bit machine, pointers are 32-bits wide. On a 64-bit machine, they are 64-bits wide. Similar rules apply for more exotic (by today’s standards) architectures.