compile_time_size_array.cpp

// Type your code here, or load an example.

#include <string>
#include <iostream>

using namespace std;

template<typename T, size_t N>
constexpr size_t arraySize(T (&)[N]) noexcept {
    return N;
}

int main() {
    char b[] = "hello";
    // runtime computation of size of an array
    cout << to_string(sizeof(b)) << endl;//6
    // compile time computatin of size of an array
    cout << to_string(arraySize(b)) << endl;//6
    return 0;
}