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标题: linux中将类的对象写入文件并读入后打印对象信息 [打印本页]

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作者: 东方耀    时间: 2021-7-27 16:13
标题: linux中将类的对象写入文件并读入后打印对象信息





linux中将类的对象写入文件并读入后打印对象信息

1. #include <iostream>
   
2. #include <fstream>
   
3. #include <string.h>
   
4. 
   
5. class Teacher
   
6. {
   
7. private:
   
8.     int age;
   
9.     char name[64];
   
10. public:
    
11.     Teacher(int _age, char *_name);
    
12.     void printInfo();
    
13. };
    
14. 
    
15. Teacher::Teacher(int _age, char *_name)
    
16. {
    
17.     Teacher::age = _age;
    
18.     strcpy(Teacher::name, _name);
    
19. }
    
20. 
    
21. void Teacher::printInfo(){
    
22.     std::cout << "name=" << Teacher::name << ",age=" << Teacher::age << std::endl;
    
23. }
    
24. 
    
25. //linux中将类的对象写入文件并读入后打印对象信息
    
26. int main(){
    
27.     std::cout << "文件读入与写" << std::endl;
    
28.     Teacher t1(30, "t30");
    
29.     Teacher t2(33, "jiang");
    
30. 
    
31.     // t1.printInfo();
    
32.     // t2.printInfo();
    
33. 
    
34.     //写入对象  linux注意细节：文件名必须是绝对路径
    
35.     char *filename = "/home/jiang/jjj_opencl_works/io.data";
    
36.     std::ofstream fout(filename, std::ios::out);
    
37.     fout.write((char*)&t1, sizeof(Teacher));
    
38.     fout.write((char*)&t2, sizeof(Teacher));
    
39.     fout.close();
    
40. 
    
41.     //读入文件
    
42.     std::ifstream fin(filename, std::ios::in);
    
43.     Teacher temp(0, " ");
    
44.     fin.read((char *)&temp, sizeof(Teacher));
    
45.     temp.printInfo();
    
46.     fin.read((char *)&temp, sizeof(Teacher));
    
47.     temp.printInfo();
    
48.     fin.close();
    
49. 
    
50. 
    
51.     return 0;
    
52. }
    
53. 
    
54. 
    
55. 
    

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