Считывание файлов в двумерный массив

#include <iostream>
#include <fstream>
#include <stdlib.h>
 
using namespace std;
ifstream F;
int main()
{
 
F.open("C:\\ABC\\A.txt");
if(!F)
{
cout<<"Can't open file"<<endl;
exit(1);
}
 
char c;
while(!F.eof())
{
F.get(c);
if(F.eof()) break;
if (c=='@' || c=='&')
    cout<<c;
}
cout<<endl;
return 0;
}

#include <iostream>
#include <algorithm>
#include <fstream>
#include <iterator>
#include <string>
#include <vector>
 
template<class InputIterator, class OutputIterator, class Predicate>
  OutputIterator copy_if(InputIterator first, InputIterator last,
                         OutputIterator result, Predicate predicate) {
  while (first!=last) {
    if (predicate(*first))
      *result++ = *first;
    ++first;
  }
  return result;
}
 
struct SymbolIn {
  SymbolIn(const std::string &symbols_) : symbols(symbols_) {}
  bool operator()(char symbol) {
    return symbols.find_first_of(symbol) != std::string::npos;
  }
  std::string symbols;
};
 
int main(int argc, char *argv[]) {
  std::string characters = "@$%&!";
 
  std::vector<char> result;
  std::ifstream infile("/usr/share/doc/linux-generic/changelog.gz", std::ios_base::in);
 
  copy_if(std::istream_iterator<char>(infile), std::istream_iterator<char>(),
          std::back_inserter(result), SymbolIn(characters));
 
  std::copy(result.begin(), result.end(),
            std::ostream_iterator<char>(std::cout, " "));
 
  return 0;
}

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