class Student
{
public:
    Student(char *name = "qwe", int stature = 180, int avoirdupois = 75);
    Student(const Student &stu);
public:
    ~Student(void);
private:
    char * m_name;
    int m_stature, m_avoirdupois;
};
Student::Student(char *name, int stature, int avoirdupois)
{
    this->m_name = new char[sizeof(name)];
    *(this->m_name) = *name;
    this->m_stature = stature;
    this->m_avoirdupois = avoirdupois;
    cout << "缺省构造函数" << endl;
    cout << "姓名：" << *(this->m_name) <<",身高：" << this->m_stature << ",体重：" << this->m_avoirdupois << endl;
}

为什么打印出来只有一个字符q?

把*去掉

打印的*去掉出乱码

用strcpy(m_name,name);然后去*输出

this->m_name = new char[sizeof(name)+1];
 this->m_name = name;

如果直接传地址的话, 函数结束之后赋的值就会和形参一起被释放了

谢谢 居然忘了字符串复制的函数

不会..只是不太安全...

#include<iostream>
using namespace std;
class Student
{
public:
    Student(char *name = "qwe", int stature = 180, int avoirdupois = 75);
    Student(const Student &stu);
    void demo();
public:
    ~Student();
private:
    char * m_name;
    int m_stature, m_avoirdupois;
};
Student::Student(char *name, int stature, int avoirdupois)
{
    this->m_name = new char[sizeof(name)+1];
    this->m_name = name;
    this->m_stature = stature;
    this->m_avoirdupois = avoirdupois;
    cout << "缺省构造函数" << endl;
    cout << "姓名：" << this->m_name <<",身高：" << this->m_stature << ",体重：" << this->m_avoirdupois << endl;
}
void Student::demo()
{
cout << "姓名：" << this->m_name <<",身高：" << this->m_stature << ",体重：" << this->m_avoirdupois << endl;
}
Student::~Student()
{
}
int main()
{
    Student s("qwt1",185,132);
    s.demo();
    return 0;
}

我之前直接传地址写过可是出现错误提示