Data Structure using struct

A data structure is a group of data elements grouped together under one name.

These data elements,known as member,can have different types and different length. Data structure can be declared in C++ using the following syntax:

// Declare and define the type in the same place.
// And also declare the object_name
// in C/C++

struct type_name{
    member_type member_name_1;
    member_type member_name_2;
    member_type member_name_3;
// and so on ...
} object_names;

// You can also seperately declare and define the type
struct type_name;

struct type_name{
    member_type member_name_1;
    member_type member_name_2;
    member_type member_name_3;
// and so on ...
} ;

// To declare a variable
// In C/C++
struct type_name object_names;

// In C++ you can ignore the struct keyword
type_name object_names;

Where type_name is a name for structure type ,object_names can be a sets of valid identifiers for objects that have the type of this structure.Within the braces{},there is a list with data members,each one is specified with data type and a valid identifier as its name.

Note that a semicolon should be at the end of object_names if there is any or follow the curly brace if there is none object_name.

Let's see an example...

struct Product{
    int weight;
    double price;
};

Product apple,banana;
Product melon;

This declare a structure type named Product,and define it has two members:weight and price,each of a fundamental type.This declaration creates a new type ,which is then used to declare three objects (variables) of this type: apple ,banana and melon.Note that once the Product is declare,it can be used as any other common types.

Right at the end of the struct definition,and before the ending semicolon(;),the oprional field object_names can be used to directly declare objects of the structure type. For example

struct Product{
    int weight;
    double price;
} apple,banana ,melon;

Text

#include <iostream>
#include <string>

using std::cin,std::cout,std::endl,std::string;

struct Movie{
    string title;
    int year;
};

auto PrintMovie(Movie) -> void;

auto main()-> int{
    Movie m;
    m.title="Avengers:Endgame";
    m.year=2019;
    cout<<"My favourite movie is";
    PrintMovie(m);
    cout<<"Title of you favourite is ";
    cin>>m.title;
    cout<<"And year is ";
    cin>>m.year;
    cout<<"So your favourite movie is";
    PrintMovie(m);
}

auto PrintMovie(Movie m) -> void {
    cout<<m.title<<"("<<m.year<<")"<<endl;
}

#include <iostream>
#include <string>

using std::cout,std::endl,std::string,std::cin;

struct Movie{
    string title;
    int year;
}

auto PtintMovie(Movie m)->void;
auto PrintMovie(Movie *m)->void;

auto main()->void{
    Movie m;
    Movie *m_ptr;
    m_ptr=&m;
    cin>>m_ptr->title;
    cout<<"And year is ";
    cin>>m_ptr->year;
    cout<<"So your favourite movie is";
    PrintMovie(m);
    PrintMovie(m_ptr);
}

auto PrintMovie(Movie m)->void{
    cout<<m.title<<"("<<m.year<<")"<<endl;
}

auto PrintMovie(Movie *m)->void{
    cout<<(m->title)<<"("<<(m->year)<<")"<<endl;
}

#include <iostream>
#include <string>

using std::cout,std::endl,std::string,std::cin;

struct Movie{
    string title,
    int year;
};

Movie Movies[2]; 

auto PrintMovie()->void;

auto main()->int{
    Movies[0].title="Avengers:Endgame";
    Movies[0].year=2019;
    cout<<"My favourite movie is";
    PrintMovie(Movies[0]);
    cout<<"Title of you favourite is ";
    cin>>Movies[1].title;
    cout<<"And year is ";
    cin>>Movies[1].year;
    cout<<"So your favourite movie is";
    PrintMovie(Movies[1]);
}

auto PrintMovie(Movie m) -> void {
    cout<<m.title<<"("<<m.year<<")"<<endl;
}

Data Structure using struct

2019 Chaoyue Summer Camp Presentation 3

2019 Chaoyue Summer Camp Presentation 3

方泓睿

Data Structure using struct

2019 Chaoyue Summer Camp Presentation 3

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