File 3

#include <iostream>
#include <fstream>

using namespace std;

int main(int argc, char **argv) {
    system("cls");
    if(argc >= 3){
        const char *output_file = argv[argc - 1];

        ofstream o_fp;
        ifstream i_fp;
        int size;
        int total_size = 0;

        o_fp.open(output_file, ios::binary);

        for(int i = 1; i < argc - 1; i++){
            i_fp.open(argv[i], ios::binary);
            i_fp.seekg(0, ios::end);
            size = i_fp.tellg();
            i_fp.seekg(0, ios::beg);
            total_size += size;
            for(int j = 1; j <= size; j++){
                o_fp.put(i_fp.get());
            }
            i_fp.close();
        }

        cout << "Total Bytes copied = " << total_size << endl;
        cout << "Output file: " << output_file << " created successfuly!" << endl;
        o_fp.close();
        return 0;
    }
    else {
        cout << "In-sufficient number of arguments" << endl;
        cout << "USAGE: File3.exe in_file1 [in_file2 ... ] out_file" << endl;
        return 1;
    }
}