#include <iostream>
#include <string>

using namespace std;

const size_t MAX_WORDS{10};
const size_t MAX_NUMBERS{5};

int main() {
    // bad
    int array1[5];

    // also not good.
    int array2[]{1,2,3,4,5};

    // ok
    int array3[MAX_NUMBERS]{1,2,3,4,5};

    string words[MAX_WORDS] {"Hello", "world"};
    size_t wordCount =  2;

    size_t i;

    for(i =0; i < MAX_NUMBERS; ++i) {
       array1[i]  = i;

    }

    for(i =0; i < MAX_NUMBERS; ++i) {
       cout << i << " " << array1[i] << " " 
            << array2[i] << " " << array3[i] << endl;
    }

    cout << endl;
  
    for(i =0; i < wordCount; ++i) {
        cout << i << " " << words[i] << endl;
    }

    return 0;
}