code: cpp11: 10 - delegating constructors

Signed-off-by: sunrisepeak <speakshen@163.com>

Author: Sunrisepeak

README.md

@@ -26,18 +26,38 @@
 
 > 持续更新中
 
-- **book:** [委托构造函数](https://github.com/Sunrisepeak/mcpp-standard/blob/main/book/src/cpp11/10-delegating-constructors.md) - 2025/08/01
-- **更多 -> [changelog](https://github.com/Sunrisepeak/mcpp-standard/blob/main/book/src/changelog.md)**
+**cpp11 - 10 - 委托构造函数**
+
+- **[code-0](https://github.com/Sunrisepeak/mcpp-standard/blob/main/dslings/cpp11/10-delegating-constructors-0.cpp) / [code-1](https://github.com/Sunrisepeak/mcpp-standard/blob/main/dslings/cpp11/10-delegating-constructors-1.cpp)** - 2025/08/02
+- **[book](https://github.com/Sunrisepeak/mcpp-standard/blob/main/book/src/cpp11/10-delegating-constructors.md)** - 2025/08/01
+
+**获取最新内容并进入自动检测**
+
+```bash
+d2x update
+d2x checker delegating-constructors
+```
+
+更多 -> [changelog](https://github.com/Sunrisepeak/mcpp-standard/blob/main/book/src/changelog.md)
 
 ---
 
 ## 目标
 
+**项目视角**
+
 - **1.** 任何人都可以在网上**免费获取**课程资源
 - **2.** 强调通过**动手实践/代码练习**的方式来学习
 - **3.** 提供**自动化的代码练习 + 方便的环境搭建**的工具支持
 - **4.** 通过社区共享、共建、互助实现良性循环 - **开源 + 论坛**
 
+**使用者视角**
+
+- [掌握] - **现代C++核心的语言特性**及使用场景
+- [掌握] - 通过编译器报错信息**定位问题的能力**
+- [熟悉] - 通过文档和cppreference解决C++中不熟悉问题的能力
+- [了解] - 如何参与技术社区 - 开源项目的使用、提问题、参与讨论或贡献的姿势
+
 ## 交互式代码练习
 
 - 🌍练习进度/状态显示

book/src/changelog.md

@@ -2,4 +2,14 @@
 
 ## 2025/08
 
-- **book:** [委托构造函数](https://github.com/Sunrisepeak/mcpp-standard/blob/main/book/src/cpp11/10-delegating-constructors.md) - 2025/08/01
+---
+**C++11 - 10 - 委托构造函数**
+
+- **[code-0](https://github.com/Sunrisepeak/mcpp-standard/blob/main/dslings/cpp11/10-delegating-constructors-0.cpp) / [code-1](https://github.com/Sunrisepeak/mcpp-standard/blob/main/dslings/cpp11/10-delegating-constructors-1.cpp)** - 2025/08/02
+- **[book](https://github.com/Sunrisepeak/mcpp-standard/blob/main/book/src/cpp11/10-delegating-constructors.md)** - 2025/08/01
+
+**练习检测命令**
+
+```bash
+d2x checker delegating-constructors
+```

dslings/cpp11/10-delegating-constructors-0.cpp

@@ -0,0 +1,85 @@
+// mcpp-standard: https://github.com/Sunrisepeak/mcpp-standard
+// license: Apache-2.0
+// file: dslings/cpp11/10-delegating-constructors-0.cpp
+//
+// Exercise/练习: cpp11 | 10 - delegating constructors | 委托构造函数
+//
+// Tips/提示: 根据编译器的输出, 修复编译器报错, 了解委托构造函数的基本使用
+//
+// Docs/文档:
+//   - https://en.cppreference.com/w/cpp/language/initializer_list.html#Delegating_constructor
+//   - https://github.com/Sunrisepeak/mcpp-standard/blob/main/book/src/cpp11/10-delegating-constructors.md
+//
+// Auto-Checker/自动检测命令:
+//
+//   d2x checker delegating-constructors
+//
+
+#include <d2x/common.hpp>
+
+#include <iostream>
+#include <string>
+
+static int construction_counter { 0 };
+
+class Account {
+    std::string id;
+    std::string name;
+    std::string coin;
+public:
+
+    Account(std::string id_) {
+        id = id_;
+        name = "momo";
+        coin = "0元";
+
+        D2X_DONT_DELETE_THIS(construction_counter++);
+    }
+
+    Account(std::string id_, std::string name_) {
+        id = id_;
+        name = name_;
+        coin = "0元";
+
+        D2X_DONT_DELETE_THIS(construction_counter++);
+    }
+
+    Account(std::string id_, std::string name_, int coin_) {
+        id = id_;
+        name = name_;
+        coin = std::to_string(coin_) + "元";
+
+        D2X_DONT_DELETE_THIS(construction_counter++);
+    }
+
+    std::string to_string() const {
+        return "Account { id: " + id + ", name: " + name + ", coin: " + coin + " }";
+    }
+};
+
+int main() { // 不要修改main函数中的代码
+
+    Account a1 { "1111" };
+    d2x_assert_eq(construction_counter, 3);
+    std::cout << a1.to_string() << std::endl;
+
+    Account a2 { "2222", "wukong" };
+    d2x_assert_eq(construction_counter, 5);
+    std::cout << a2.to_string() << std::endl;
+
+    Account a3 { "3333", "mcpp", 100 };
+    d2x_assert_eq(construction_counter, 6);
+    std::cout << a3.to_string() << std::endl;
+
+    Account gi { "0000", "GImpact", 648 };
+    std::cout << gi.to_string() << std::endl;
+
+    d2x_assert(
+        gi.to_string() ==
+        "Account { id: 0000, name: GImpact, coin: 648原石 }"
+    );
+
+    D2X_WAIT
+
+    return 0;
+}

dslings/cpp11/10-delegating-constructors-1.cpp

@@ -0,0 +1,92 @@
+// mcpp-standard: https://github.com/Sunrisepeak/mcpp-standard
+// license: Apache-2.0
+// file: dslings/cpp11/10-delegating-constructors-1.cpp
+//
+// Exercise/练习: cpp11 | 10 - delegating constructors | 委托构造函数注意事项
+//
+// Tips/提示: 根据编译器的输出, 修复编译器报错, 了解委托构造函数的注意事项
+//
+// Docs/文档:
+//   - https://en.cppreference.com/w/cpp/language/initializer_list.html#Delegating_constructor
+//   - https://github.com/Sunrisepeak/mcpp-standard/blob/main/book/src/cpp11/10-delegating-constructors.md
+//
+// Auto-Checker/自动检测命令:
+//
+//   d2x checker delegating-constructors
+//
+
+#include <d2x/common.hpp>
+
+#include <iostream>
+#include <string>
+
+struct Object { // 不要修改这个类的代码
+    static int construction_counter;
+    std::string name;
+    Object() {
+        construction_counter++;
+    }
+
+    Object(std::string name_) : name { name_ } {
+        construction_counter++;
+    }
+};
+
+class Account {
+    std::string id;
+    std::string name;
+    std::string coin;
+    Object obj;
+public:
+
+    Account(std::string id_)
+        : Account(id_, "momo"), coin { "100元" }
+    {
+
+    }
+
+    Account(std::string id_, std::string name_) {
+        Account(id_, name_, 0);
+    }
+
+    Account(std::string id_, std::string name_, int coin_) {
+        id = id_;
+        name = name_;
+        coin = std::to_string(coin_) + "元";
+        obj = Object(name_);
+    }
+
+    std::string get_id() const {
+        return id;
+    }
+
+    std::string get_object_name() const {
+        return obj.name;
+    }
+
+    std::string to_string() const {
+        return "Account { id: " + id + ", name: " + name + ", coin: " + coin
+            + ", Object { name: " + obj.name
+            + ", construction_counter: " + std::to_string(Object::construction_counter) + " } }";
+    }
+};
+
+int Object::construction_counter { 0 };
+
+int main() { // 不要修改main函数中的代码
+
+    Account a1 { "1111",  "hello" };
+    std::cout << a1.to_string() << std::endl;
+    d2x_assert(a1.get_id() == "1111");
+
+    Object::construction_counter = 0;
+    Account a2 { "2222",  "d2learn", 100 };
+    std::cout << a2.to_string() << std::endl;
+
+    d2x_assert(a2.get_object_name() == "d2learn");
+    d2x_assert_eq(Object::construction_counter, 1);
+
+    D2X_WAIT
+
+    return 0;
+}

dslings/cpp11/xmake.lua

@@ -107,4 +107,12 @@ target("cpp11-09-list-initialization-2")
     add_files("09-list-initialization-2.cpp")
 
 target("cpp11-09-list-initialization-3")
-    add_files("09-list-initialization-3.cpp")
+    add_files("09-list-initialization-3.cpp")
+
+-- target: cpp11-10-delegating-constructors
+
+target("cpp11-10-delegating-constructors-0")
+    add_files("10-delegating-constructors-0.cpp")
+
+target("cpp11-10-delegating-constructors-1")
+    add_files("10-delegating-constructors-1.cpp")

dslings/d2x/common.hpp

@@ -28,6 +28,7 @@
 
 #define D2X_WAIT HONLY_LOGW("🥳 Delete the D2X_WAIT to continue...");
 #define D2X_YOUR_ANSWER
+#define D2X_DONT_DELETE_THIS(x) x
 
 template<typename F, typename... Args>
 class d2x_is_invocable {