C++ 二进制文件的读写 实现类的序列化

 1 #include<iostream>
 2 #include"fstream"  
 3 using namespace std;
 4  
 5  
 6 /*二进制文件的读写 实现类的序列化*/
 7  
 8  
 9 class Teacher{
10  
11  
12 public:
13     Teacher()  //默认构造函数
14     {
15         this->age = 33;
16         strcpy(name, "");
17     }
18     Teacher(int age, char *name)
19     {
20         this->age = age;
21         strcpy(this->name, name);
22     }
23     void printf()
24     {
25         cout << "age=" << age << "\n name=" << name << endl;
26     }
27 private :
28     int age;  //年龄
29     char name[30];   //姓名 采用数组形式  采用数组指针会变得很麻烦
30 };
31  
32  
33  
34  
35 int main()
36 {
37  
38  
39     ofstream fpo("f://binary.txt", ios::binary);   //建立一个输出流对象和文件关联 以二进制方式打开文件
40  
41  
42     if (fpo.fail())
43     {
44         cout << "文件读取失败" << endl;
45     }
46  
47  
48     Teacher t1(21, "t21"), t2(22, "t22");
49  
50  
51     fpo.write((char *)(&t1), sizeof(Teacher));
52     fpo.write((char *)(&t2), sizeof(Teacher));  //写入类
53  
54     fpo.close();
55  
56     ifstream fpi("f://binary.txt");
57  
58     if (fpi.fail())
59     {
60         cout << "文件读取失败" << endl;
61     }
62     Teacher t;
63     fpi.read((char *)(&t),sizeof(Teacher));
64  
65  
66     t.printf();
67  
68  
69     fpi.read((char *)(&t), sizeof(Teacher));
70     t.printf();
71  
72 fpi.close();   //关闭文件
73 system("pause");return 0;};