module pind.samples.ja.parallelism.parallelism_1;

import std.stdio;
import core.thread;

struct Student {
    int number;

    void aSlowOperation() {
        writefln("The work on student %s has begun", number);

        // 長期の操作をシミュレートするためにしばらく待つ
        Thread.sleep(1.seconds);

        writefln("The work on student %s has ended", number);
    }
}

void main() {
    auto students =
        [ Student(1), Student(2), Student(3), Student(4) ];

    foreach (student; students) {
        student.aSlowOperation();
    }
}