온라인 D 컴파일러

import std.stdio;

void main() {
    writeln("Hello, World!");
}

import std.stdio;

void main() {
    string name = "Alice";
    int age = 30;
    double height = 5.6;
    bool isStudent = true;
    writefln("%s is %d years old", name, age);
}

import std.stdio;

void main() {
    int x = 10;
    if (x > 0) writeln("Positive");
    else if (x == 0) writeln("Zero");
    else writeln("Negative");
}

import std.stdio;

void main() {
    foreach (i; 0..5)
        writefln("Count: %d", i);

    string[] fruits = ["apple", "banana", "cherry"];
    foreach (fruit; fruits)
        writeln(fruit);
}

import std.stdio;

string greet(string name, string greeting = "Hello") {
    return greeting ~ ", " ~ name ~ "!";
}

void main() {
    writeln(greet("Alice"));
    writeln(greet("Bob", "Hi"));
}

import std.stdio;

void main() {
    string[] fruits = ["apple", "banana", "cherry"];
    fruits ~= "date";
    writeln(fruits[1]);

    int[string] person = ["age": 30];
    writeln("Age: ", person["age"]);
}

import std.stdio;

class Dog {
    string name, breed;
    this(string name, string breed) {
        this.name = name;
        this.breed = breed;
    }
    string bark() { return name ~ " says Woof!"; }
}

void main() {
    auto dog = new Dog("Rex", "Labrador");
    writeln(dog.bark());
}

import std.stdio;
import std.conv;

void main() {
    try {
        int n = to!int("not a number");
    } catch (ConvException e) {
        writeln("Error: ", e.msg);
    } catch (Exception e) {
        writeln("Unexpected: ", e.msg);
    } finally {
        writeln("Done");
    }
}

import std.stdio;
import std.file;

void main() {
    std.file.write("output.txt", "Hello, File!");
    string content = readText("output.txt");
    writeln(content);
}

import std.stdio;
import std.algorithm;
import std.range;

void main() {
    auto nums = iota(1, 11);
    auto evens = nums.filter!(n => n % 2 == 0);
    auto squares = nums.map!(n => n * n);

    writeln("Evens: ", evens);
    writeln("Squares: ", squares.take(5));
    writeln("Sum: ", nums.sum());
}