gistfile1.cpp

#include <fstream>
#include <iostream>
#include <string>

int main()
{
    std::ifstream in("input.txt", std::ios::in);
    std::ofstream out("output.txt", std::ios::out);

    if(in)
    {
        char tempChar;

        while(!in.eof())
        {
            in.get(tempChar);

            if(tempChar != ' ')
                out << tempChar;
        }

        in.close();
        out.close();
    }
    else
        std::cerr << "Input file not found.";
}