[已解决]c++读取txt文件

Tiancl

c++读取txt文件,txt文件大概是五个字符串一行，然后差不多一百行，怎么读取，并且存入一个string类的二维数组。

最佳答案

月排行榜 / 总排行榜

c_cpp_python

2022-2-26 23:25:39

你这个问的就有点笼统...
那我就给你贴一段书本上讲文件IO的代码吧...

1. // fileio.cpp -- saving to a file
   
2. #include <iostream> // not needed for many systems
   
3. #include <fstream>
   
4. #include <string>
   
5. 
   
6. int main()
   
7. {
   
8.     using namespace std;
   
9.     string filename;
   
10. 
    
11.     cout << "Enter name for new file: ";
    
12.     cin >> filename;
    
13. 
    
14. // create output stream object for new file and call it fout
    
15.     ofstream fout(filename.c_str());
    
16. 
    
17.     fout << "For your eyes only!\n";        // write to file
    
18.     cout << "Enter your secret number: ";   // write to screen
    
19.     float secret;
    
20.     cin >> secret;
    
21.     fout << "Your secret number is " << secret << endl;
    
22.     fout.close();           // close file
    
23. 
    
24. // create input stream object for new file and call it fin
    
25.     ifstream fin(filename.c_str());
    
26.     cout << "Here are the contents of " << filename << ":\n";
    
27.     char ch;
    
28.     while (fin.get(ch))     // read character from file and
    
29.         cout << ch;         // write it to screen
    
30.     cout << "Done\n";
    
31.     fin.close();
    
32.     // std::cin.get();
    
33.     // std::cin.get();
    
34.     return 0;
    
35. }
    

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c_cpp_python

你这个问的就有点笼统...
那我就给你贴一段书本上讲文件IO的代码吧...

1. // fileio.cpp -- saving to a file
   
2. #include <iostream> // not needed for many systems
   
3. #include <fstream>
   
4. #include <string>
   
5. 
   
6. int main()
   
7. {
   
8.     using namespace std;
   
9.     string filename;
   
10. 
    
11.     cout << "Enter name for new file: ";
    
12.     cin >> filename;
    
13. 
    
14. // create output stream object for new file and call it fout
    
15.     ofstream fout(filename.c_str());
    
16. 
    
17.     fout << "For your eyes only!\n";        // write to file
    
18.     cout << "Enter your secret number: ";   // write to screen
    
19.     float secret;
    
20.     cin >> secret;
    
21.     fout << "Your secret number is " << secret << endl;
    
22.     fout.close();           // close file
    
23. 
    
24. // create input stream object for new file and call it fin
    
25.     ifstream fin(filename.c_str());
    
26.     cout << "Here are the contents of " << filename << ":\n";
    
27.     char ch;
    
28.     while (fin.get(ch))     // read character from file and
    
29.         cout << ch;         // write it to screen
    
30.     cout << "Done\n";
    
31.     fin.close();
    
32.     // std::cin.get();
    
33.     // std::cin.get();
    
34.     return 0;
    
35. }
    

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