C + + composite type (struct)

In fact, C + + structure can be understood as a python-like dictionary, I personally understand, but there are differences

First look at the structure

#include <iostream> keyword          tags become the name of the new type struct          inflatable{    std::  String  mystr;                   struct member     char name[];     float volume;     Double Price ;};

C + + can omit the keyword struct when declaring a struct variable

Also pay attention to external declarations, and local declarations

#include <iostream>#include<string>#include<cstring>structinflatable{std::stringmystr; Charname[ -]; floatvolume; DoublePrice ;};intMainintargcChar Const*argv[]) {  using namespacestd; Inflatable Guest= {    "Hello",    "Glorious Gloria",    1.88,    29.99  }; Inflatable PAL= {    " World",    "Audacious Arthur",    3.12,    32.99  }; intA=12.40; Std::cout<< Guest.mystr <<'\ n'; Std::cout<< a <<'\ n'; Std::cout<<"Expand your guest list with <<"<< Guest.name <<">>"<<" and"<<"<<"<< Pal.name <<">>"<<'\ n'; Std::cout<<"You can have both for $"<< Guest.price + pal.price <<'\ n'; return 0;}

View Code

Other Structure Properties

#include <iostream>#include<string>#include<cstring>structinflatable{std::stringmystr; Charname[ -]; floatvolume; DoublePrice ;};intMainintargcChar Const*argv[]) {  using namespacestd; Inflatable Guest= {    "Hello",    "Glorious Gloria",    1.88,    29.99  }; Inflatable Choice=Guest; This method calls the member to assign a value
Or

Inflatable choice;
Choice = Guest;

Std::cout<<"Expand your guest list with <<"<< Guest.name <<">>"<<'\ n'; Std::cout<<"Choice CHOICE.MYSTR---->"<< Choice.mystr <<'\ n'; return 0;}

It's OK

struct inflatable{    std::string  mystr;     Char name[];     float volume;     Double  = {"hello""glorious"1.11  One};
Of course, you can also not assign a value

Array of structures

You can also create an array of elements as structs, and the methods are identical to creating arrays of primitive types. For example:

#include <iostream>#include<string>#include<cstring>structinflatable{std::stringmystr; Charname[ -]; floatvolume; DoublePrice ;} Mr_glitz= {"Hello","Glorious",1.11, One};intMainintargcChar Const*argv[]) {  using namespacestd; Inflatable guests[2] = {    {"Hello","Doman",2.1,2.22},    //{"World", "Corleone", 2.2, 3333}  }; Std::cout<<"Guests[0].mystr:"<< guests[0].mystr <<'\ n'; Std::cout<<"Guests[1].name:"<< guests[1].name <<'\ n'; return 0;}

Bit fields in the structure

　　

struct torgle_register{  int SN:  4;   int :4;   BOOL 1 ;   BOOL 1  = {truefalse};

C + + composite type (struct)