Question

Let say I have a multi-dimensional array like

int a[10][10]
int b[10][10]

void arrayCopy(int* a, int* b, int size){
    memcpy(b, a, size);
}

int main(){
   a[0][0] = 13;
   a[0][1] = 17;
   "and so on..."

   arraycopy(&a[0][0], &b[0][0], 10);
}

This code is not working I am unable to copy all the values from a -> b, where am I doing wrong??

Answer 1

The problem is in the size. sizeof(a) is 100*sizeof(int), and you should pass that number.

(Your code copies 10 bytes, when you want to copy 100 ints.