How can I use a range-based for-loop on an array passed to a non-main function in C ?

Range-based for-loop on array passed to non-main function

In C , a range-based for-loop can be used to iterate over an array. However, when an array is passed to a non-main function, it decays into a pointer, losing its size information.

To resolve this issue and enable the use of a range-based for-loop, the array should be referenced instead of being passed as a pointer. This retains the array's size information. Here are the modified examples demonstrating the correct approach:

<code class="cpp">void foo(int (&amp;bar)[3]);

int main() {
  int bar[3] = {1,2,3};
  for (int i : bar) {
    cout << i << endl;
  }
  foo(bar);
}

void foo(int (&amp;bar)[3]) {
  for (int i : bar) {
    cout << i << endl;
  }
}

// Generic implementation
template <std::size_t array_size>
void foo(int (&amp;bar)[array_size]) {
  for (int i : bar) {
    cout << i << endl;
  }
}</code>

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