c++中的函数或子程序，它接受数组并将其打印到文本文件中

Question

我试图在c++中编写一个函数或子程序，该函数或子程序需要一个数组并将其打印到文本文件。我知道用FORTRAN很容易做到这一点。我还没有找到一个好的方法在c++中做到这一点。由于

Answer 1

无论您使用的是std::vector<float>还是float[]风格的数组，过程都是相似的。

#include <iostream>     // std::cout
#include <iterator>     // std::ostream_iterator
#include <vector>       // std::vector
#include <algorithm>    // std::copy
int main () {
  std::vector<float> myvector;
  for (int i=1; i<10; ++i) myvector.push_back(i*10.f);
  std::ostream_iterator<int> out_it (std::cout,", ");
  std::copy ( myvector.begin(), myvector.end(), out_it );
  return 0;
}

Answer 2

这可能对你有帮助

#include <iostream> // library that contain basic input/output functions
#include <fstream>  // library that contains file input/output functions
using namespace std;
int main()
{
    char array[] = {'H','e','l','l','o',' ','W','o','r','l','d','!',''}; //array to write into file 
    ofstream fout("test.txt"); //opening an output stream for file test.txt
    /*checking whether file could be opened or not. If file does not exist or don't have write permissions, file
  stream could not be opened.*/
  if(fout.is_open())
    {
    //file opened successfully so we are here
    cout << "File Opened successfully!!!. Writing data from array to file" << endl;
        for(int i = 0; array[i] != ''; i++)
        {
      fout << array[i]; //writing ith character of array in the file
        }
    cout << "Array data successfully saved into the file test.txt" << endl;
    }
    else //file could not be opened
    {
        cout << "File could not be opened." << endl;
    }
    return 0;
}