0xfeeefeee错误

BFSDT

cpp的fstream并没有足够智能到足以保存类对象的的地步，所以你要么自己实现，要么借助第三方类库，下面我帮你写个一个比较简单的方法，你拿去吧

1. #include <iostream>
   
2. #include <fstream>
   
3. #include <string>
   
4. #include <map>
   
5. 
   
6. using namespace std;
   
7. 
   
8. class ceshi{
   
9. public:
   
10.     map<int, string> obm;
    
11.     int count;
    
12.     friend ifstream& operator>>(ifstream& is, ceshi& st);
    
13.     friend ofstream& operator<<(ofstream& os, const ceshi& st);
    
14. };
    
15. 
    
16. ifstream& operator>>(ifstream& is, ceshi& st){
    
17.     is >> st.count;
    
18.    
    
19.     //如果map对象有多个的话，这里可以写个循环来循环写入
    
20.     int first;
    
21.     string second;
    
22.     is >> first;
    
23.     is >> second;
    
24. 
    
25.     st.obm.insert(pair<int, string>(first, second));
    
26.     return is;
    
27. }
    
28. 
    
29. ofstream& operator<<(ofstream& os, ceshi& st){
    
30.     os << st.count << " ";
    
31.     for (auto iter = st.obm.begin(); iter != st.obm.end(); iter++) {
    
32.         os << iter->first << " " << iter->second << " ";
    
33.     }
    
34.     return os;
    
35. }
    
36. 
    
37. 
    
38. int main() {
    
39.     ceshi c;
    
40.     c.count = 6;
    
41.     c.obm[44] = "gdagzsd";
    
42.     ofstream fout("ceshi.txt");
    
43.     fout << c;
    
44.     fout.close();
    
45. 
    
46.     ceshi c2;
    
47.     ifstream fin("ceshi.txt");
    
48.     fin >> c2;
    
49. 
    
50.     cout << c2.count << endl;
    
51.     for (auto iter = c2.obm.begin(); iter != c2.obm.end(); iter++){
    
52.         cout << iter->first << " " << iter->second << endl;
    
53.     }
    
54.     fin.close();
    
55. 
    
56. 
    
57. 
    
58. 
    
59.     return 0;
    
60. }

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