├── 2018 ├── A1_大作业题目汇总_0406.pptx ├── L1-1-lzy.pptx ├── L1-2-lzy.pptx ├── L12-设计模式-行为型模式v4.pptx ├── L13-设计模式-结构型模式v3.pptx ├── L14-设计模式-创建型模式V3.pptx ├── L2-封装与接口-lzy.pptx ├── L3-创建与销毁-lzy.pptx ├── L4-引用与复制_lzy.pptx ├── L5-组合与继承_lzy.pptx ├── L6-虚函数与多态_lzy.pptx ├── L7-复习内容.pptx ├── L7-模板与STL初步_lzy.pptx └── L8-STL进阶_lzy.pptx ├── 2019 ├── L1-1-绪论-2019.pptx ├── L1-2-编程环境-2019.pptx ├── L10-结构型模式-2019.pptx ├── L11-创建型模式-2019.pptx ├── L2-封装与接口-2019.pptx ├── L3-创建与销毁-2019.pptx ├── L4-引用与复制-2019.pptx ├── L5-组合与继承-2019.pptx ├── L6-虚函数与多态-2019.pptx ├── L7-模板与STL初步.pptx ├── L8-STL进阶-2019.pptx ├── L9-行为型模式-2019.pptx ├── README.md ├── oop期中复习-2019.pptx ├── oop期末复习-2019.pptx ├── 简单逻辑表达式参考例程.zip └── 编程思想及案例讲解_10_v3.1.pptx └── README.md /2018/A1_大作业题目汇总_0406.pptx: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/thunlp/OOP-THU/bf0801b5f181ad31e38795778f4e466135510623/2018/A1_大作业题目汇总_0406.pptx 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https://raw.githubusercontent.com/thunlp/OOP-THU/bf0801b5f181ad31e38795778f4e466135510623/2019/L9-行为型模式-2019.pptx -------------------------------------------------------------------------------- /2019/README.md: -------------------------------------------------------------------------------- 1 | # OOP-THU 2 | OOP Material & QA 3 | 4 | 5 | 6 | 7 | 8 | ### L2-封装与接口-2019 9 | PPT第13页，```struct { char *name; } anon_u;```只定义了一个指针变量，未使用new分配空间，从该指针地址开始读入可能会出错```cin >> as[0].id.name; ```,可修改为```struct { char name[17]; } anon_u;``` 10 | 11 | 12 | 13 | ### L3-创建与销毁-2019 14 | PPT第26页，```Test t2 = t1;```调用了拷贝构造函数来构造t2，故不会使得count++; 15 | 16 | PPT第32页， 常量静态数据成员和静态数据成员一样，满足访问权限的任意函数均可访问，~~但都不能修改~~, 常量静态数据成员不能被修改 17 | 18 | PPT第39页， 尽量少用全局对象，不推荐例子中 19 | ``` 20 | void foo() { 21 | input.doSomething(); 22 | } 23 | Input input; 24 | int main() { 25 | foo(); 26 | } 27 | ``` 28 | input的定义应在foo函数之前。 29 | 30 | ### L4-引用与复制-2019 31 | 第42页std::move的描述有误，具体参见https://www.zhihu.com/question/50652989 32 | 33 | ``` 34 | class Complex { 35 | public: 36 | string Name; 37 | Complex(string s="empty"):Name(s){} 38 | ~Complex(){printf("del %s\n",Name.c_str());} 39 | }; 40 | Complex Func(Complex c){ 41 | Complex tmp("tmp"); 42 | return tmp; 43 | } 44 | ``` 45 | 在开启返回值优化(RVO)时，tmp变量是否被析构取决于调用，若函数返回值用于赋值的话不会被析构。 46 | 47 | 不会被析构： 48 | ``` 49 | int main(){ 50 | Complex a=Func(Complex("c")); 51 | a.Name="a"; 52 | } 53 | ``` 54 | 程序输出: 55 | ``` 56 | del c 57 | del a 58 | ``` 59 | 60 | 会被析构： 61 | ``` 62 | int main(){ 63 | Complex a; 64 | Func(Complex("c")); 65 | a.Name="a"; 66 | } 67 | ``` 68 | 程序输出: 69 | ``` 70 | del tmp 71 | del c 72 | del a 73 | ``` 74 | 感谢小教员@董博文的注解 75 | 76 | 77 | ### L5-组合与继承-2019 78 | 第20页相对于最初原版本(少数人下载了最初版本)，新增基类构造函数的参数默认值不会被派生类继承。默认值会导致产生多个构造函数版本，但都会被派生类继承。 79 | 基类构造函数只定义：```Base(int i, int j=1) {}``` 能让 ```Derive obj(356); Derive obj2(356,789);```编译通过 80 | 81 | ### L6-虚函数与多态-2019 82 | 增加55页题目 83 | 84 | 85 | 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