# std::chrono::weekday::c_encoding, std::chrono::weekday::iso_encoding

From cppreference.com
< cpp‎ | chrono‎ | weekday

constexpr unsigned c_encoding() const noexcept; | (1) | (since C++20)
constexpr unsigned iso_encoding() const noexcept; | (2) | (since C++20)

1) Returns the weekday value stored in *this.
2) Returns the weekday value stored in *this, except that Sunday (stored as ​0​) is interpreted as 7 according to ISO 8601.

### Return value

1) The weekday value stored in *this.
2) c_encoding() == 0u ? 7u : c_encoding().

### Example

Run this code

    #include <chrono>
    #include <iostream>

    int main()
    {
        std::cout << "i: C: ISO: Weekday:\n";

        for (unsigned i{0}; i != 8; ++i) {
            const std::chrono::weekday w{i};
            std::cout << i << "  "
                      << w.c_encoding() << "  "
                      << w.iso_encoding() << "    "
                      << w << '\n';
        }
    }

Possible output:

    i: C: ISO: Weekday:
    0  0  7    Sun
    1  1  1    Mon
    2  2  2    Tue
    3  3  3    Wed
    4  4  4    Thu
    5  5  5    Fri
    6  6  6    Sat
    7  0  7    Sun

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