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day-11: 3 minutes: c++ using - the type alias


c++ the type alias using 3 minutes, maybe 1 minutes.

using

c++ using has many wonderful and awesome features, only the type alias is talked here.

type alias using

As the type alias denotes, it is used for an alias of a type.

using my_int = int;	// my_int is an alias of int now, when using my_int, it is using int in future.

my_int a = 5;

If a name of a type is too long, you can use using to short it.

using my_double = const long long doube &;

my_double x = 2.44;

Written on Oct 31, 2024

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c++ std::exception:

std::cout.write(err.data(), err.size());

std::cout << std::endl;

caught:

  ==================================================
  #        The c++ programming language.           #
  #                                                #
  #        Home: cppfx.xyz                         #
  #        E                                       #
  #        Join c++ Discord: yZcauUAUyC            #
  #        Deck                                    #
  ==================================================

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