C++

22.6    The Main Program

The conclusion is then formed by main() from Listing 22.4. You will not encounter any surprises. You need to close the anonymous namespace opened in the first listing, then main begins.

A comprehensive try-catch handles any exceptions that you might have thrown elsewhere in the program. exc.what() outputs an appropriate error message.

The fNamen vector stores all command-line arguments, which the for loop then iterates over. In it, pack() calls the compression function.

// https://godbolt.org/z/5bWx6PzdP} // namespaceint main(int argc, const char* argv[]) {    try {        const std::vector<string> fNamen {argv+1, argv+argc};        for(auto fName : fNamen) {            std::cout << "packing " << fName << "... ";            pack(fName, fName+".gz"); std::cout ...