106 lines
2.0 KiB
C++
106 lines
2.0 KiB
C++
#include <iostream>
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#include <typeinfo>
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class Animal
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{
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public:
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virtual ~Animal() {}
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};
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class Cat : public Animal
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{
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public:
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void meow()
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{
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std::cout << "Meow!" << std::endl;
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}
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};
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class Dog : public Animal
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{
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public:
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void bark()
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{
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std::cout << "Woof!" << std::endl;
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}
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};
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int main()
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{
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// 任务1：将Animal类型指针转换为Cat类型指针
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Animal *animal1 = new Cat();
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try
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{
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Cat *cat = dynamic_cast<Cat *>(animal1);
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if (cat)
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{
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cat->meow();
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}
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else
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{
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throw 1;
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}
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}
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catch (int e)
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{
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std::cout << "转换失败：无法将Animal类型转换为Cat类型。" << std::endl;
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}
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// 任务2：将Animal类型指针转换为Dog类型指针
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Animal *animal2 = new Dog();
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try
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{
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Dog *dog = dynamic_cast<Dog *>(animal2);
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if (dog)
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{
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dog->bark();
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}
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else
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{
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throw 2;
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}
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}
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catch (int e)
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{
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std::cout << "转换失败：无法将Animal类型转换为Dog类型。" << std::endl;
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}
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// 任务3：将Cat类型指针转换为Animal类型指针
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Cat *cat2 = new Cat();
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try
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{
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Animal *animal3 = dynamic_cast<Animal *>(cat2);
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if (animal3)
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{
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std::cout << "转换成功：Cat类型成功转换为Animal类型。" << std::endl;
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}
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}
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catch (const std::bad_cast &e)
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{
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std::cout << "转换失败：" << e.what() << std::endl;
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}
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// 任务4：将Dog类型指针转换为Animal类型指针
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Dog *dog2 = new Dog();
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try
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{
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Animal *animal4 = dynamic_cast<Animal *>(dog2);
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if (animal4)
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{
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std::cout << "转换成功：Dog类型成功转换为Animal类型。" << std::endl;
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}
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}
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catch (const std::bad_cast &e)
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{
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std::cout << "转换失败：" << e.what() << std::endl;
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}
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// 释放内存
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delete animal1;
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delete animal2;
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delete cat2;
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delete dog2;
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return 0;
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}
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