柚子快报激活码778899分享：4月25日 C++day3
#include
using namespace std;
class Person
{
const string name;
int age;
char sex;
public:
Person():name("lisi")
{cout << "Person无参构造" << endl;}
Person(string name,int age,char sex):name(name),age(age),sex(sex)
{cout << "Person有参构造" << endl;}
void show()
{
cout <<"person的show:"<< name << age << sex < } Person(const Person &other):name(other.name) { this->age = other.age; this->sex=other.sex; cout << "Person的拷贝构造函数" << endl; } Person &operator=(const Person &other) { if(&other!=this) { string name=other.name; this->age=other.age; this->sex=other.sex; cout << "Person的拷贝赋值函数" << endl; } return *this; } }; class Stu { Person p1; double *pd; public: Stu():pd(new double) {cout << "Stu的无参构造" << endl;} Stu(string name,int age,char sex,double score):p1(name,age,sex),pd(new double(score)) {cout << "Stu有参构造" << endl;} void show() { p1.show(); cout << *pd < } Stu(const Stu &other):p1(other.p1) { this->pd=other.pd; } Stu &operator=(const Stu &other) { if(&other!=this) { this->p1=other.p1; *(this->pd)=*(other.pd); cout << "Stu的拷贝赋值函数" << endl; } return *this; } }; int main() { Person p2("wangwu",20,'n'); p2.show(); Person p3=p2; p3.show(); Person p4; p4=p2; p4.show(); Stu s2("zhangsan",20,'n',99.2); s2.show(); Stu s3=s2; s3.show(); Stu s4; s4=s2; s4.show(); return 0; } #include #include using namespace std; using namespace std; class myString { private: char *str; //变化c风格的字符串 int size; //记录字符串的实际长度 public: //无参构造 myString() : str(new char), size(0) { str[0] = '\0'; cout<<"无参构造"< } //有参构造 myString(const char* s) { size = strlen(s); str = new char[size + 1]; strcpy(str, s); cout<<"有参构造"< } //拷贝构造 myString(const myString &other) { size = other.size; str = new char[size + 1]; strcpy(str, other.str); cout<<"拷贝构造函数"< } //拷贝赋值函数 myString& operator=(const myString &other) { if (this != &other) { size = other.size; str = new char[size + 1]; strcpy(str, other.str); cout<<"拷贝赋值函数"< } return *this; } //析构函数 ~myString() { delete[] str; cout<<"析构"< } //判空函数 void empty() { if(size == 0) {cout<<"空"< else {cout<<"非空"< } //size函数 void mysize() { cout<<"size = "< } //c_str函数 char* c_str() { return str; } //at函数 char &at(int pos) { if (pos < 0 || pos >= size) { cout<<"位置不合法"< } return str[pos]; } }; int main() { myString s1("hello"); myString s2 = s1; myString s3; cout< cout< cout< cout< s2.empty(); s2.mysize(); return 0; } 柚子快报激活码778899分享：4月25日 C++day3 文章链接
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