#include <memory.h>
#include <stdio.h>
 
struct SomeArray {
    int index;
    char randompadding[5];
};
 
int main() {
    const int XSIZE = 10;
    const int YSIZE = 10;
    SomeArray arr[XSIZE * YSIZE];
    SomeArray arr2d[XSIZE][YSIZE];
    int counter = 1;
 
    ::memset(arr, 0, sizeof(arr));
 
    for (int y = 0; y < YSIZE; y++) {
        for (int x = 0; x < XSIZE; x++) {
            arr[XSIZE*y + x].index = counter++;
        }
    }
 
    ::memcpy(arr2d, arr, sizeof(arr));
 
    for (int x = 0; x < XSIZE; x++) {
        for (int y = 0; y < YSIZE; y++) {
            printf("%d\n", arr2d[x][y].index);
        }
    }
}
 

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