IO库 8.4

 1 #include <iostream>
 2 #include <fstream>
 3 #include <string>
 4 #include <vector>
 5 using namespace std;
 6 
 7 void ReadFileToVec(const string& fileName, vector<string>& vec)
 8 {
 9     ifstream ifs(fileName);
10     if (ifs) {
11         string buf;
12         while (getline(ifs, buf)) {
13             vec.push_back(buf);
14         }
15     }
16 }
17 
18 int main()
19 {
20     vector<string> vec;
21     ReadFileToVec("data.txt", vec);
22     for (const auto& str : vec) 
23         cout << str << endl;
24     }
25     return 0;
26 }