问答题

请使用“答题”菜单或从VC6中打开考生文件夹proj1下的工程proj1。此工程包含了类Pets(“宠物”)和主函数main的定义。程序中位于每个//ERRO************found************下的语句行有错,请加以改正。改正后程序的输出结果是: Name: sonny Type: dog Name: John Type: dog Name: Danny Type: cat Name: John Type: dog 注意:只能修改每个//ERROR************found************下的那一行,不要改动程序中的其他内容。 //源程序 #include <iostream> using namespace std; enum Pets_type{dog,cat,bird,fish}; class Pets{ private: char*name: Pets_type type; public: Pets(const char*name="sonny",Pets_type type=dog); Pets& operator=(const Pets &s); ~Pets(); void show() const; }; Pets::Pets(const char*name,Pets_type type){ //构造函数 this->name=new char[strlen(name)+1]; strcpy(this->name,name); //ERROR************found************ type=type; } Pets::~Pets(){ //析构函数,释放name所指向的字符串 //ERROR************found************ name=’/0’: } Pets&Pets::operator=(const Pets &s){ if(&s==this) return*this; //确保不要向自身赋值 delete[]name; name=new char[strlen(s.name)+1]; //ERROR************found************ strcpy(s.name,this->name); type=S.type; return*this: } void Pets::show() const{ couL<<"Name:"<<name<<"Type:"; switch(type){ case dog: cout<<"dog";break; case cat: cout<<"cat";break; case bird: cout<<"bird";break; case fish: cout<<"fish";break; } cout<<endl; } int main(){ Pets mypet1,mypet2("John",dog); Pets youpet("Danny",cat); mypet1.show(); mypet2.show(); youpet.show(); youpet=mypet2; youpet.show(); return 0: }

【参考答案】

1)this->type=type; 2)delete[]name; 3)strcpy(this->name,s.nam......

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