C ++将信息从文本文件加载到2D数组中

Question

I'm a very novice programmer and I've run into a bit of a problem. I need to load a 2D array with the data stored in a text file. The text file reads as follows (Two numbers then the end of the line. ie 1 1949, then next line):

---

1 1949

2 1972

3 1983

4 1959

5 1987

6 1991

7 1995

8 1991

9 1957

10 1980

11 1995

12 1995

---

The array should be formatted in the same fashion. Certainly not looking for an answer here, but a push in the right direction. I've been searching to no avail. Thank you.

Answer 1

Here I use pair<int, int> to store each row; if you have C++11 you can use array<int, 2> instead. The rest is boilerplate, reading and splitting lines.

#include <cassert>
#include <fstream>
#include <sstream>
#include <string>
#include <vector>

using namespace std;

int main(int argc, char* argv[])
{
  assert(argc == 2);
  ifstream input(argv[1]);
  assert(input);

  vector<pair<int, int> > data;

  for (string line; getline(input, line); )
  {
    istringstream stream(line);
    data.resize(data.size() + 1);
    stream >> data.back().first >> data.back().second;
  }
}