File5a

#include <iostream>
#include <fstream>
#include <cstdlib>

using namespace std;

int main(){
    char in_filename[1024], out_filename[1024];
    system("clear");
    cout << "Enter the name of the input file: ";
    cin.getline(in_filename, 1024, '\n');
    cout << "Enter the name of the output file: ";
    cin.getline(out_filename, 1024, '\n');

    ifstream in(in_filename, ios::in);
    fstream out(out_filename, ios::in | ios::out | ios::trunc);

    if(!in){
        cout << "Could not open input file" << endl;
        return 1;
    }
    else{
        char ch;
        while(in.get(ch)){
            if(ch >= 'a' && ch <= 'z'){
                out.put(ch - 32);
            }
            else{
                out.put(ch);
            }
        }
        // Displaying the output file
        cout << "The contents of the output file is\n";
        out.seekp(0, ios::beg);
        while(out.get(ch)){
            cout << ch;
        }
    }
    in.close();
    out.close();
    return 0;
}