https://blog.youkuaiyun.com/tqnypc_367zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/tqnypc_367/article/details/154772168https://blog.youkuaiyun.com/tqnypc_367/article/details/154772168tqnypc_367Thu, 13 Nov 2025 09:07:29 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154772153https://blog.youkuaiyun.com/tqnypc_367/article/details/154772153tqnypc_367Thu, 13 Nov 2025 09:06:58 +0800 b $ 或 $ a && b $）。`、`-`） > 乘法类（`*`、`/`、`%`） > 加法类（` `、`-`） > 比较类（`==`、`<`） > 逻辑类（`&&`、`||`）。如果忽略优先级，结果会错误。例如，在 `a b c` 中，先计算 `$a b$`，再与 `c` 相加。]]>https://blog.youkuaiyun.com/tqnypc_367/article/details/154749981https://blog.youkuaiyun.com/tqnypc_367/article/details/154749981tqnypc_367Wed, 12 Nov 2025 20:05:57 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154749947https://blog.youkuaiyun.com/tqnypc_367/article/details/154749947tqnypc_367Wed, 12 Nov 2025 20:05:26 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154702501https://blog.youkuaiyun.com/tqnypc_367/article/details/154702501tqnypc_367Tue, 11 Nov 2025 20:23:24 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154702487https://blog.youkuaiyun.com/tqnypc_367/article/details/154702487tqnypc_367Tue, 11 Nov 2025 20:22:53 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154634776https://blog.youkuaiyun.com/tqnypc_367/article/details/154634776tqnypc_367Mon, 10 Nov 2025 08:13:03 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154634759https://blog.youkuaiyun.com/tqnypc_367/article/details/154634759tqnypc_367Mon, 10 Nov 2025 08:12:32 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154561721https://blog.youkuaiyun.com/tqnypc_367/article/details/154561721tqnypc_367Sat, 08 Nov 2025 09:15:06 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154561703https://blog.youkuaiyun.com/tqnypc_367/article/details/154561703tqnypc_367Sat, 08 Nov 2025 09:14:35 +0800getInfo();$dog = new Dog(阿黄dog->eat();// 输出：阿黄正在进食（继承自Animal）// 输出：bool(true)// 输出：bool(true)$dog->name = dynecho $dog->speak();class Dog extends Animal { // 子类继承。]]>https://blog.youkuaiyun.com/tqnypc_367/article/details/154539332https://blog.youkuaiyun.com/tqnypc_367/article/details/154539332tqnypc_367Fri, 07 Nov 2025 19:11:02 +0800 返回类型 {- 返回值：使用`->`指定返回类型，无返回值时可省略或使用`-> Void`忽略标签：使用`_`（如`multiply(_ x: Int...)`）print(greet()) // 输出: Hello, Swift!let sum = add(a: 3, b: 5) // 结果: 8。函数名(参数1: 值1, 参数2: 值2)]]>https://blog.youkuaiyun.com/tqnypc_367/article/details/154539314https://blog.youkuaiyun.com/tqnypc_367/article/details/154539314tqnypc_367Fri, 07 Nov 2025 19:10:31 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154499379https://blog.youkuaiyun.com/tqnypc_367/article/details/154499379tqnypc_367Thu, 06 Nov 2025 21:20:49 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154499371https://blog.youkuaiyun.com/tqnypc_367/article/details/154499371tqnypc_367Thu, 06 Nov 2025 21:20:18 +0800speak()` 调用时，程序通过 `animal1` 的 vptr 找到 vtable，再根据索引调用 `Dog::speak()`。类似地，`animal2->speak()` 调用 `Cat::speak()`。基类析构函数应声明为虚函数，以防止资源泄漏（如示例中的 `virtual ~Animal() {}`）。void speak() override { // 重写虚函数。- `Dog` 和 `Cat` 是派生类，重写 `speak()` 函数。]]>https://blog.youkuaiyun.com/tqnypc_367/article/details/154455865https://blog.youkuaiyun.com/tqnypc_367/article/details/154455865tqnypc_367Wed, 05 Nov 2025 21:26:54 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154455851https://blog.youkuaiyun.com/tqnypc_367/article/details/154455851tqnypc_367Wed, 05 Nov 2025 21:26:19 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154408897https://blog.youkuaiyun.com/tqnypc_367/article/details/154408897tqnypc_367Tue, 04 Nov 2025 22:10:14 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154408884https://blog.youkuaiyun.com/tqnypc_367/article/details/154408884tqnypc_367Tue, 04 Nov 2025 22:09:40 +0800https://blog.youkuaiyun.com/tqnypc_367/article/details/154321242https://blog.youkuaiyun.com/tqnypc_367/article/details/154321242tqnypc_367Mon, 03 Nov 2025 00:23:08 +0800pairs[i].key);printf(: %dn(&myMap, apple // 输出 5。]]>https://blog.youkuaiyun.com/tqnypc_367/article/details/154321220https://blog.youkuaiyun.com/tqnypc_367/article/details/154321220tqnypc_367Mon, 03 Nov 2025 00:22:08 +0800