Question

I was using c++ and reading a file character by character. I did that using >> operator. But when space comes up it will display wrong because in that case it won’t take that input. So, how can I get a space character and that too without using getline.

Answer 1

You can use std::istreambuf_iterator:

#include <fstream>
#include <iterator>
#include <iostream>

int main()
{
    std::ifstream file("file.txt");

    std::istreambuf_iterator<char> it(file), end;

    for (; it != end; ++it) {
        std::cout << *it;
    }
}

You’ll get better performance if you open the file in binary mode, read it whole at once in a buffer and then work on that:

 #include <vector>
 #include <fstream>

 int main()
 {
      std::ifstream file("file.txt", std::ios::binary);
      file.seekg(0, std::ios::end);  // seek to the end
      std::streamsize size = file.tellg();  // get the position (file size)
      file.seekg(0, std::ios::beg);  // seek back to the beginning

      std::vector<char> buffer(size);
      file.read(&buffer[0], size);

      // do the work on vector
 }