Structure : struct, enumeration, bit-field, typedef, union

Structure  : struct, enumeration, bit-field, typedef, union 
Nama      : Deab Sina
NIM        : 49012078
Jurusan    : D4 TMD ITB Batch 6

This is video about:struct, enumeration, bit-field, typedef,

union

 

Link to this video:

http://youtu.be/RitaaSXzh-U 

Source code: 

===================================================

+ struct.cpp

===================================================

#include <iostream>
using namespace std;

struct database{
int id_number;
int age;
float salary;
};
int main()
{
        database employee; // There is now an variable that has modifiable // variable inside it
        employee.age = 22;
        employee.id_number = 1;
        employee.salary = 12000.2;

        cout<<"employee age = "<<employee.age<<endl;
        cout<<"employee id_number = " <<employee.id_number<<endl;
        cout<<"employee salary = "<<employee.salary<<endl;
        system("pause");
        return 0;
} 




=================================================== 
+ union.cpp
===================================================

// union.cpp : Defines the entry point for the console application.

#include "stdafx.h"
#include <iostream>
using namespace std;

union sample{
int p;
};
int _tmain(int argc, _TCHAR* argv[])
{
        // Union data type
        union sample content;
        content.p =37;

        cout<<"Display the union storage content"<<endl;
        cout<<" ONLY one at a time!"<<endl;
        cout<<"---------------------------------"<<endl;
        cout<<"Integer : "<<content.p<<endl;

        system("pause");
        return 0;
}

===================================================

+ enumeration.cpp

===================================================

// enumeration.cpp : Defines the entry point for the console application.

#include "stdafx.h"
#include <iostream>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
        enum days {mon, tue, wed, thu, fri, sat, sun};
        days daysinweek; // day in a week
        daysinweek = wed; // day in a week is wed

        switch (daysinweek){
        case sun: cout <<"Sunday"<<endl;
                break;
        case mon: cout <<"Monday"<<endl;
               break;
        case tue: cout <<"Tuesday"<<endl;
                break;
        case wed: cout <<"Wednesday"<<endl;
                break;
        case thu: cout <<"Thursday"<<endl;
                break;
        case fri: cout <<"Friday"<<endl;
                break;
        case sat: cout <<"Saturday"<<endl;
                break;
        }
        system("pause");
        return 0;
}



===================================================

+ typedef.cpp

===================================================

// typedef.cpp : Defines the entry point for the console application.

#include "stdafx.h"
#include <iostream>
using namespace std;

typedef struct TestStruct
{
        int p;
        char q;
        double r;
} mine;
int _tmain(int argc, _TCHAR* argv[])
{
        mine testvar; // the declaration becomes simpler
        testvar.p = 200;
        testvar.q = 'T';
        testvar.r = 1.234;

        cout<<"testvar.p = "<<testvar.p<<endl;
        cout<<"testvar.q = "<<testvar.q<<endl;
        cout<<"testvar.r = "<<testvar.r<<endl;
        system("pause");
        return 0;
}



===================================================

+ bit-field.cpp

===================================================

// bit_field.cpp : Defines the entry point for the console application.

#include "stdafx.h"
#include <iostream>
#include <assert.h>
using namespace std;

class MyDay{
        unsigned day : 31;// bit field (32 bit)
        public:
        void SetDay(int aDay){
        assert ( aDay <31);
        day = aDay;
        }
        void Print(){
                cout<<"Day is : "<<day<<endl;
        }
};
int _tmain(int argc, _TCHAR* argv[])
{
        MyDay d;
        d.SetDay(20);
        d.Print();

        cout<<"Size of MyDay = "<<sizeof(d)<<endl;

        system("pause");
        return 0;
}

 

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