Examples

The classic first applications 'Hello World'.

Console

hello_world_console.cpp:

#include <xtd/xtd>

using namespace xtd;

auto main() -> int {
  console::background_color(console_color::blue);
  console::foreground_color(console_color::white);
  console::write_line("Hello, World!");
}

or simply

#include <xtd/xtd>

using namespace xtd;

auto main() -> int {
  console::out << background_color(console_color::blue) << foreground_color(console_color::white) << "Hello, World!" << environment::new_line;
}

CMakeLists.txt:

cmake_minimum_required(VERSION 3.20)

project(hello_world_console)
find_package(xtd REQUIRED)
add_sources(hello_world_console.cpp)
target_type(CONSOLE_APPLICATION)

Build and run

Open "Command Prompt" or "Terminal". Navigate to the folder that contains the project and type the following:

xtdc run

Output

Hello, World!

Gui

hello_world_form.cpp

#include <xtd/xtd>

using namespace xtd::forms;

class main_form : public form {
public:
  main_form() {
    text("Hello world (message_box)");

    button1.location({10, 10});
    button1.parent(*this);
    button1.text("&Click me");
    button1.click += [] {
      message_box::show("Hello, World!");
    };
  }
  
private:
  button button1;
};

auto main() -> int {
  application::run(main_form {});
}

or simply

#include <xtd/xtd>

auto main() -> int {
  auto main_form = xtd::forms::form::create("Hello world (message_box)");
  auto button1 = xtd::forms::button::create(main_form, "&Click me", {10, 10});
  button1.click += [] {xtd::forms::message_box::show("Hello, World!");};
  xtd::forms::application::run(main_form);
}

CMakeLists.txt:

cmake_minimum_required(VERSION 3.20)

project(hello_world_form)
find_package(xtd REQUIRED)
add_sources(hello_world_form.cpp)
target_type(GUI_APPLICATION)

Build and run

Open "Command Prompt" or "Terminal". Navigate to the folder that contains the project and type the following:

xtdc run

Output

Windows :

macOS :

Linux Gnome :

Unit tests

hello_world_test.cpp:

#include <xtd/xtd>
#include <string>

using namespace std;
using namespace xtd::tunit;

namespace unit_tests {
  class test_class_(hello_world_test) {
    void test_method_(create_string_from_literal) {
      string s = "Hello, World!";
      valid::are_equal(13, s.size());
      assert::are_equal("Hello, World!", s);
    }
    
    void test_method_(create_string_from_chars) {
      string s = {'H', 'e', 'l', 'l', 'o', ',', ' ', 'W', 'o', 'r', 'l', 'd', '!'};
      valid::are_equal(13, s.size());
      string_assert::starts_with("Hello,", s);
      string_assert::ends_with(" World!", s);
    }
  };
}

auto main() -> int {
  return console_unit_test().run();
}

or without helpers

#include <xtd/xtd>
#include <string>

using namespace std;
using namespace xtd::tunit;

namespace unit_tests {
  class hello_world_test;
  
  test_class_attribute<hello_world_test> hello_world_test_class_attr {"unit_tests::hello_world_test"};
  class hello_world_test : public test_class {
    test_method_attribute create_string_from_literal_attr {"create_string_from_literal", *this, &hello_world_test::create_string_from_literal};
    void create_string_from_literal() {
      string s = "Hello, World!";
      valid::are_equal(13, s.size());
      assert::are_equal("Hello, World!", s);
    }
    
    test_method_attribute create_string_from_chars_attr {"create_string_from_chars", *this, &hello_world_test::create_string_from_chars};
    void create_string_from_chars() {
      string s = {'H', 'e', 'l', 'l', 'o', ',', ' ', 'W', 'o', 'r', 'l', 'd', '!'};
      valid::are_equal(13, s.size());
      string_assert::starts_with("Hello,", s);
      string_assert::ends_with(" World!", s);
    }
  };
}

auto main() -> int {
  return console_unit_test().run();
}

CMakeLists.txt:

cmake_minimum_required(VERSION 3.20)

project(hello_world_test)
find_package(xtd REQUIRED)
add_sources(hello_world_test.cpp)
target_type(TEST_APPLICATION)

Build and run

Open "Command Prompt" or "Terminal". Navigate to the folder that contains the project and type the following:

xtdc run

Output

Visual Studio Output

More examples

Examples provides over 800 examples to help you use xtd, grouped by libraries and topics.

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