閒話少說，先看一段簡單的程式碼

#include <iostream>
#include <string>
#include <vector>
#include <fstream>
#include <sstream>
#pragma warning(disable:4996)
using namespace std;
class teacher
{
public:
    teacher()
    {

    }
    teacher(string  name, int age)
    {
        this->name = name;
        
        this->age = age;
    }
    string GetName()
    {
        return name;
    }
    string SetName(string name)
    {
        this->name = name;
    }
    int GetAge()
    {
        return age;
    }
    ~teacher()
    {

    }
    void Print()
    {
        cout << this->name << "  " << this->age;
    }
private:
    
    string name;
    int age;
};


int main()
{
    teacher t1("zhangsan",20);
    teacher t2("李四",40);
    ofstream fin("test1.txt", ios::binary);
    fin.write((char *)&t1, sizeof(teacher));
    fin.write((char *)&t2, sizeof(teacher));
    
    fin.close();

    teacher tmp;
   
    ifstream fout("test1.txt", ios::binary);    
    fout.read((char *)&tmp, sizeof(teacher));
    tmp.Print();
    cout << endl;
    fout.read((char *)&tmp, sizeof(teacher));
    tmp.Print();
    cout << "string:"<<sizeof(string) << endl;     
    fout.close();
    return 0;

}
 

當使用以上程式碼的方法時，雖然vs2013執行時不會報錯，但是當你單步除錯的時候，到最後析構teacher這個類的時候，會有程式中斷。原因是因為string型別導致的，本人使用以下程式碼就不會有這個問題，程式碼如下：

#include <iostream>
#include <string>
#include <vector>
#include <fstream>
#include <sstream>
#pragma warning(disable:4996)
using namespace std;
class teacher
{
public:
	teacher()
	{

	}
	teacher(char* name, int age)
	{
		this->name = name;
		//strcpy(this->name, name);
		this->age = age;
	}
	string GetName()
	{
		return name;
	}
	string SetName(string name)
	{
		this->name = name;
	}
	int GetAge()
	{
		return age;
	}
	~teacher()
	{

	}
	void Print()
	{
		cout << this->name << "  " << this->age;
	}
private:
	//char name[50];
	string name;
	int age;
};


int main()
{
	teacher t1("zhangsan",20);
	teacher t2("李四",40);
	ofstream fin("test1.txt", ios::binary);
//	fin.write((char *)&t1, sizeof(teacher));
//	fin.write((char *)&t2, sizeof(teacher));
	fin << t1.GetName() << endl;
	fin << t1.GetAge() << endl;
	fin.close();

	teacher tmp;
	char name_tt[30];
	string name_tmp;
	ifstream fout("test1.txt", ios::binary);
	/*
	fout.read((char *)&tmp, sizeof(teacher));
	tmp.Print();
	cout << endl;
	fout.read((char *)&tmp, sizeof(teacher));
	tmp.Print();
	cout << "string:"<<sizeof(string) << endl;
	*/
	fout.getline(name_tt, 30);
	cout << name_tt << endl;
	fout.close();
	return 0;

}
 

至於為什麼會出現這種問題，本人也不曉得，網上有人說是string的儲存不是連續，但是這和string的析構有什麼關係？歡迎大家討論。

在此謝謝大家。。。

參考文獻：

https://blog.csdn.net/sq1652827791/article/details/48176597

https://stackoverflow.com/questions/10335714/c-iostream-binary-read-and-write-issues