Cannot use .begin() or .end() on an array

Question

The error reads:

request for member \'begin\', \'end\' in \'arr\' which is non class type int[5], unable to deduce from expression error.

Answer 1

For a standard fixed-length C array, you can just write

int c_array[] = {1,3,5,7,9}, acc = 0;

for (auto it : c_array) {
    acc += it;
}

The compiler does the behind-the-scenes work, eliminating the need to create all those begin and end iterators.