Исправить оишбку в коде

#include <stdio.h>
#include <iostream>
#include <string>
class Unit
{
public:
    Unit(const char* name, int hitpoints, int damage)
    : hitpoints_(hitpoints), damage_(damage)
    {
        if(name != nullptr)
        {
            name_ = new char[strlen(name) + 1];
            strcpy(name_, name);
        }
    }
 
    ~Unit()
    {
        delete [] name_;
    }
 
    char* name_;
    int hitpoints_;
    int damage_;
};
 
 
void ShowStats(Unit unit)
{
    std::cout << unit.name_ << " - " << unit.hitpoints_ << " - " << unit.damage_;
}
int main()
{
    Unit marine("marine", 45, 6);
 
    ShowStats(marine);
    // Game cycle...
    ShowStats(marine);
 
    return 0;
}

Unit(const Unit& u)
    {
        name_ = new char[strlen(u.name_) + 1];
        strcpy(name_, u.name_);
    }

void ShowStats(Unit &unit)
{
    cout << unit.name_ << " - " << unit.hitpoints_ << " - " << unit.damage_ << endl;
}

Unit(const Unit &obj)
{
    hitpoints_ = obj.hitpoints_;
    damage_ = obj.damage_;
    name_ = new char[strlen(obj.name_) + 1];
    strcpy(name_, obj.name_);
}