feat: 统一 cpp 文件编码格式为 utf-8

2023-01-02 20:39:00 +08:00
parent ade7173887
commit 368eda305f
63 changed files with 327 additions and 327 deletions
--- a/practical_exercises/10_day_practice/day3/内联函数.cpp
+++ b/practical_exercises/10_day_practice/day3/内联函数.cpp
@@ -1,6 +1,6 @@
 #include<iostream>
 using namespace std;
-//<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+//函数声明
 inline double CalArea(double radius);
 int main(int argc, char const *argv[])
 {
@@ -11,7 +11,7 @@ int main(int argc, char const *argv[])
    system("pause");
    return 0;
 }
-//<EFBFBD>ӹؼ<EFBFBD><EFBFBD><EFBFBD>inline
+//加关键字inline
 inline double CalArea(double radius)
 {
    return 3.14*radius*radius;
--- a/practical_exercises/10_day_practice/day3/函数综合练习题.cpp
+++ b/practical_exercises/10_day_practice/day3/函数综合练习题.cpp
@@ -1,9 +1,9 @@
 /*
-һԲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Χ<EFBFBD><EFBFBD>һԲ<EFBFBD>͹<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Χ<EFBFBD><EFBFBD>դ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>դ<EFBFBD><EFBFBD><EFBFBD>۸<EFBFBD>Ϊ35Ԫ/<2F>ף<EFBFBD><D7A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ20Ԫ/ƽ<><C6BD><EFBFBD>ס<EFBFBD>
-<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ3<EFBFBD>ף<EFBFBD><EFBFBD><EFBFBD>Ӿ<EFBFBD>ذ뾶<EFBFBD>ɼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̼<EFBFBD><EFBFBD>㲢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>դ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ۡ<EFBFBD>
+一圆型游泳池如图所示，现在需在其周围建一圆型过道，并在其四周围上栅栏。栅栏价格为35元/米，过道造价为20元/平方米。
+过道宽度为3米，游泳池半径由键盘输入。要求编程计算并输出过道和栅栏的造价。

-ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԲǶ<EFBFBD><EFBFBD>СԲ<EFBFBD><EFBFBD>
-СԲ<EFBFBD>ڴ<EFBFBD>Բ<EFBFBD>м䣬СԲΪ<EFBFBD><EFBFBD>Ӿ<EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD>Բ<EFBFBD><EFBFBD>СԲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+图形描述：大圆嵌套小圆：
+小圆在大圆中间，小圆为游泳池，大圆与小圆间隔为过道。
 */
 #include<iostream>
 using namespace std;
@@ -25,13 +25,13 @@ Circle::Circle(float r)
    radius=r;
 }

-// <EFBFBD><EFBFBD><EFBFBD><EFBFBD>Բ<EFBFBD><EFBFBD><EFBFBD>ܳ<EFBFBD>
+// 计算圆的周长
 float Circle::Circumference() const
 {
    return 2 * PI * radius;
 }
        
-// <EFBFBD><EFBFBD><EFBFBD><EFBFBD>Բ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 
+// 计算圆的面积 
 float Circle::Area() const
 {
    return PI * radius * radius;
@@ -42,20 +42,20 @@ int main(int argc, char const *argv[])
    float radius;
    float FenceCost, ConcreteCost; 
    
-    // <EFBFBD><EFBFBD>ʾ<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뾶
+    // 提示用户输入半径
    cout<<"Enter the radius of the pool: ";
    cin>>radius;

-    // <EFBFBD><EFBFBD><EFBFBD><EFBFBD> Circle <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    // 声明 Circle 对象
    Circle Pool(radius);
    Circle PoolRim(radius + 3);       
-    // <EFBFBD><EFBFBD><EFBFBD><EFBFBD>դ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>۲<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    // 计算栅栏造价并输出
    FenceCost = PoolRim.Circumference() * FencePrice;
-    cout << "Fencing Cost is <EFBFBD><EFBFBD>" << FenceCost << endl;
+    cout << "Fencing Cost is ￥" << FenceCost << endl;
    
-    //  <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>۲<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    //  计算过道造价并输出
    ConcreteCost = (PoolRim.Area() - Pool.Area())*ConcretePrice;
-    cout << "Concrete Cost is <EFBFBD><EFBFBD>" << ConcreteCost << endl;
+    cout << "Concrete Cost is ￥" << ConcreteCost << endl;
    system("pause");
    return 0;
 }
--- a/practical_exercises/10_day_practice/day3/类前向声明.cpp
+++ b/practical_exercises/10_day_practice/day3/类前向声明.cpp
@@ -1,31 +1,31 @@
 /*
-ʹ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܵġ<EFBFBD><EFBFBD><EFBFBD>Ҫע<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǣ<EFBFBD>
-<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
-Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ø<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뿴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Σ<EFBFBD>
+使用前向引用声明虽然可以解决一些问题，但它并不是万能的。需要注意的是，
+尽管使用了前向引用声明，但是在提供一个完整的类声明之前，不能声明该类的对象，
+也不能在内联成员函数中使用该类的对象。请看下面的程序段：
 */

-//<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>
+//第一种
 #include<iostream>
-class Fred;	//ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+class Fred;	//前向引用声明
 class Barney {
-   Fred x;	//<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Fred<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+   Fred x;	//错误：类Fred的声明尚不完善
 };
 class Fred {
   Barney y;
 };


-//<EFBFBD>ڶ<EFBFBD><EFBFBD><EFBFBD>
-class Fred;	//ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+//第二种
+class Fred;	//前向引用声明
 
 class Barney {
 public:
   void method()
   {
-     x->yabbaDabbaDo();	//<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Fred<EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڶ<EFBFBD><EFBFBD><EFBFBD>֮ǰ<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD>
+     x->yabbaDabbaDo();	//错误：Fred类的对象在定义之前被使用
   }
 private:
-   Fred* x;   //<EFBFBD><EFBFBD>ȷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Fred<EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>
+   Fred* x;   //正确，经过前向引用声明，可以声明Fred类的对象指针
 };
 
 class Fred {
@@ -36,5 +36,5 @@ class Fred {
 }; 

 /*
-<EFBFBD>ܽ᣺<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD>ʹ<EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>漰<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>κ<EFBFBD>ϸ<EFBFBD>ڡ<EFBFBD>
+总结：当使用前向引用声明时，只能使用被声明的符号，而不能涉及类的任何细节。
 */
--- a/practical_exercises/10_day_practice/day3/静态成员函数1.cpp
+++ b/practical_exercises/10_day_practice/day3/静态成员函数1.cpp
@@ -1,8 +1,8 @@
 /*
-֪ʶ<EFBFBD>㣺
-<EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
-<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>þ<EFBFBD>̬<EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
-<EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ľ<EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+知识点：
+静态成员函数
+类外代码可以使用类名和作用域操作符来调用静态成员函数。
+静态成员函数只能引用属于该类的静态数据成员或静态成员函数。
 */
 #include<iostream>
 using namespace std;
--- a/practical_exercises/10_day_practice/day3/静态成员函数2.cpp
+++ b/practical_exercises/10_day_practice/day3/静态成员函数2.cpp
@@ -10,9 +10,9 @@ class A
 void A::f(A a)
 {
   
-    //<EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ľ<EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
-    // cout<<x; //<EFBFBD><EFBFBD>x<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
-    cout<<a.x;  //<EFBFBD><EFBFBD>ȷ
+    //静态成员函数只能引用属于该类的静态数据成员或静态成员函数。
+    // cout<<x; //对x的引用是错误的
+    cout<<a.x;  //正确
 }

 int main(int argc, char const *argv[])
--- a/practical_exercises/10_day_practice/day3/静态数据成员.cpp
+++ b/practical_exercises/10_day_practice/day3/静态数据成员.cpp
@@ -1,9 +1,9 @@
 /*
-ѧϰ֪ʶ<EFBFBD><EFBFBD>
-<EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD>Ա
-<EFBFBD>ùؼ<EFBFBD><EFBFBD><EFBFBD>static<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
-<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>ά<EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD>Ա<EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
-<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ⶨ<EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(::)<29><>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ࡣ
+学习知识：
+静态数据成员
+用关键字static声明
+该类的所有对象维护该成员的同一个拷贝
+必须在类外定义和初始化，用(::)来指明所属的类。
 */
 #include <iostream>
 using namespace std;
@@ -17,7 +17,7 @@ public:
 	void GetC() {cout<<" Object id="<<countP<<endl;}
 private:	
 	int X,Y;
-    //<EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ⲿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD>ӳ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    //静态数据成员，必须在外部定义和初始化，内部不能直接初始化！
 	static int countP;
 };
 Point::Point(Point &p)
@@ -25,7 +25,7 @@ Point::Point(Point &p)
 	Y=p.Y;
 	countP++;
 }
-//<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ⶨ<EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(::)<29><>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ࡣ
+//必须在类外定义和初始化，用(::)来指明所属的类。
 int Point::countP=0; 
 int main()	
 {	Point A(4,5);