36课的小作业，按照答案做了还是崩溃，求解答

fyc444

#include <iostream>
#include <string>
using namespace std;
class CStudent
{
public:
        char * p_name;
        char sex;
        int num;
        int age;
        CStudent();
        CStudent(char* pname, char t_sex, int t_num, int t_age);
        ~CStudent();
        CStudent(CStudent& stud);
        };
CStudent::CStudent(CStudent& stud)//拷贝构造函数，博主syc的答案
{
        int dst_name_len = 0;
        if (stud.p_name) dst_name_len = strlen(stud.p_name);
        this->p_name = NULL;
        if (dst_name_len > 0)
{
        this->p_name = new char[dst_name_len + 1];
        memset(this->p_name, 0, dst_name_len + 1);
        strcpy(this->p_name, stud.p_name);
}
        this->sex = stud.sex;
        this->num = stud.num;
        this->age = stud.age;
}
CStudent::CStudent(char* pname, char t_sex, int t_num, int t_age) :sex(t_sex), num(t_num), age(t_age)//构造函数
{
    int len=strlen(pname);
        p_name=new char(len+1);
        memset(p_name,0,(len+1));
        strcpy(p_name, pname);
}
CStudent::~CStudent()//析构函数
{
        if(p_name)
        {
        delete [] p_name;
        }
}
int main()
{
        CStudent stu1("aaa",'f',50,12);
        CStudent stu2(stu1);
        return 0;
}

不存在的存在

你申请了两个对象，所以析构函数执行两次，delete执行第二次的时候，申请的空间在第一次就释放了，所以第二次delete会报错

XYX009

31行：strcpy_s(this->p_name, dst_name_len + 1, stud.p_name);

40行：
p_name = new char[len + 1];
memset(p_name, 0, (len + 1));
strcpy_s(p_name, len + 1, pname);

fyc444

感谢，感谢