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Command line arguments (🟢 Beginner)

Here is a new example illustrating a practical trick with xtd: how to retrieve command line arguments in a simple and elegant way.

Modern C++ code​

#include <print>
#include <vector>

auto main(int argc, const char * argv[]) -> int {
  for (auto arg : std::vector(argv, argv + argc))
    std::println("{}", arg);
}

xtd code​

#include <xtd/xtd>

auto main() -> int {
  for (auto arg : environment::get_command_line_args())
    println(arg);
}

Use​

If we launch the application with the following arguments:

./my_app one two "three four" five

The result will be:

/!---OMITTED---!/my_app
one
two
three four
five

Remarks​

  • xtd allows you to retrieve the arguments passed to the application without the need to go through int argc, const char* argv[]. This greatly simplifies the structure of the hand.
  • The first argument returned is always the executable file with path.
  • See main function and startup_ keyword to go further.

See also​