array quick init

00.quickinit.cpp

// 00.quickinit.cpp
// juanfc 2024-11-30
// https://gist.github.com/juanfal/67cf1a014cc6eeb2bd75b26f3d2eb34b

#include <iostream>
#include <array>
using namespace std;

const int N = 3;
const int NN = 100;

typedef array<int,N> TVec;
typedef array<int,NN> TLongVect;


int main()
{
    void print(TVec v);

    TVec a = {1, 2, 3};
    TVec b = {{1, 2, 3}}; // More general!!

    print(a);
    print(b);

    int dummyNot0Val = 33;
    TLongVect lv = {dummyNot0Val};
    int cnt = 0;
    for (int i = 0; i < NN; ++i)
        if (lv[i] != dummyNot0Val)
            ++cnt;
    if (cnt > 0) {
        printf("I have counted %d (%g%%) different elements of the initialization %d\n",
               cnt, (float)100*cnt/NN, dummyNot0Val);
    }

    return 0;
}
void print(TVec v)
{
    for (int i = 0; i < N; ++i)
        cout << v[i] << " ";
    cout << endl;
}