报错读取字符串时出错如何解决？

Question

为啥w->print();无输出结果，报错读取字符串时出错

#include<iostream>
#include<string>
using namespace std; 

class printable {
public: 
    virtual string print() = 0;
};

class Player :public printable
{
    string m_Name;
public:
    Player(string name) {
        m_Name = name;
    }
    string print(){ return m_Name; }
};

void class_name(printable* obj)
{
    cout << obj->print() <<endl;
}

int main()
{
Player* w = new Player("阿巴");
    class_name(w);//有输出结果 
    w->print();//无输出结果 
    cin.get();
}

Answer 1

• w->print(); 你又没有输出它的返回值呀
• 改成如下：

cout<< w->print()<<endl;

• 或者你在print里，用cout 输出也行