char指针输出乱码是怎么回事，应该怎么改？
问题描述：
#include <iostream>
using namespace std;
class Student
{
private:
char* name;
int score;
public:
Student(const char* name, int score)
{
this->name = new char(*name);
this->score = score;
}
~Student()
{
if (name != nullptr)
delete name;
if (score != NULL)
score = NULL;
}
Student(const Student& a)
{
this->name = new char(*a.name);
this->score = a.score;
}
void setName(const char* name)
{
this->name = new char(*name);
}
void print_info()
{
cout << "name:" << this->name << ", " << "score:" << this->score << endl;
}
};
int main()
{
Student stu1("Jhon", 98);
Student stu2(stu1);
stu2.setName("Tom");
stu1.print_info();
stu2.print_info();
return 0;
}
最后输出，name会显示乱码
答
修改如下，供参考：
#include <iostream>
#include <string>
using namespace std;
class Student
{
private:
char* name;
int score;
public:
Student(const char* name, int score)
{
this->name = new char(strlen(name)+1); //this->name = new char(*name);
strcpy(this->name,name);
this->score = score;
}
~Student()
{
if (name != NULL)
delete name;
if (score != NULL)
score = NULL;
}
Student(const Student& a)
{
this->name = new char(strlen(a.name)+1); //this->name = new char(*a.name);
strcpy(this->name,a.name);
this->score = a.score;
}
void setName(const char* name)
{
if(this->name != NULL) delete this->name;
this->name = new char(strlen(name)+1); //this->name = new char(*name);
strcpy(this->name,name);
}
void print_info()
{
cout << "name:" << this->name << ", " << "score:" << this->score << endl;
}
};
int main()
{
Student stu1("Jhon", 98);
Student stu2(stu1);
stu2.print_info();
stu2.setName("Tom");
stu1.print_info();
stu2.print_info();
return 0;
}