enumerate instead of a manual counter (C++23 ranges)

std::views::enumerate pairs each element with its index, so the loop body never maintains a counter by hand.

#include <iostream>
#include <ranges>
#include <string>
#include <vector>

int main() {
    std::vector<std::string> names{"ada", "grace", "linus"};
    // enumerate pairs each element with its index: no manual counter.
    for (auto [i, name] : std::views::enumerate(names)) {
        std::cout << i << ": " << name << '\n';
    }
}

Observed output:

0: ada
1: grace
2: linus

Facts verified 2026-11-04. The code on this page was compiled and run on the box with GCC 16.2.0 at -std=c++23 -Wall -Wextra; the outputs quoted are the observed outputs. MSVC was not tested.

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