Do I need to put “&” when I pass a 2D array to a function or 2D arrays automatically do so by reference as 1Ds.
void fnc (int& arr[5][5]) {
}
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Do I need to put “&” when I pass a 2D array to a function or 2D arrays automatically do so by reference as 1Ds.
void fnc (int& arr[5][5]) {
}
It will be passed by value if you don’t specify pass by reference
&.However arrays decay to pointers, so you’re basically passing a pointer by value, meaning the memory it points to will be the same.
In common terms, modifying
arrinside the function will modify the originalarr(a copy is not created).Also, 1D arrays also aren’t passed “automatically” by reference, it just appears so since they decay to pointers.