Structure in C++

Contents of this section:

1. A simple program demonstrating structure 
2. Nested structure 
3. Using functions in structure

1. A simple program demonstrating structure

/ File Name: ~ftp/pub/class/cplusplus/Structure/StrucSimple.cpp
// Purpose: Demonstrates the use of structure in C++.
// Stores some personal data in a structure, then prints
// the info out.

#include <iostream>
using namespace std;
int main()
{
// Defining a structure
struct PersonalData
{
char *FirstName;
char *LastName;
char *Birthday; // in the format of 12/30/1978
int PhoneNum;
};
 // don't forget the ending ";"
// Declaring a variable of type PersonalData
PersonalData PersonOne;
// Populate PersonOne with data
PersonOne.FirstName = "John";
PersonOne.LastName = "Doe";
PersonOne.Birthday = "12/30/1978";
PersonOne.PhoneNum = 5855555;
// Print the data out
cout << "PersonOne's First name is: " << PersonOne.FirstName << endl;
cout << "PersonOne's Last name is: " << PersonOne.LastName<< endl;
cout << "PersonOne's Birthday is: " << PersonOne.Birthday<< endl;
cout << "PersonOne's Phone number is: " << PersonOne.PhoneNum<< endl;
return 0;

}
Output

PersonOne's First name is: John
PersonOne's Last name is: Doe
PersonOne's Birthday is: 12/30/1978
PersonOne's Phone number is: 5855555
2. Nested structure
// File Name: ~ftp/pub/class/cplusplus/Structure/StrucSimple.cpp
// Purpose: Demonstrates the use of nested structure in C++.
// Stores some personal data in a structure, then prints
// the info out.

#include <iostream>
using namespace std;
int main()
{
// Defining a structure for name
struct Name
{
char *FirstName;
char *LastName;
};
struct PersonalData
{
Name NameField; // struct as a memeber
char *Birthday; // in the format of 12/30/1978
int PhoneNum;
}; // don't forget the ending ";"


// Declaring a variable of type PersonalData
PersonalData PersonOne;
PersonOne.NameField.FirstName = "John";
PersonOne.NameField.LastName = "Doe";
// Populate PersonOne with data
PersonOne.Birthday = "12/30/1978";
PersonOne.PhoneNum = 5855555;
// Print the data out
cout << "First name is: " << PersonOne.NameField.FirstName << endl;
cout << "Last name is: " << PersonOne.NameField.LastName<< endl;
cout << "Birthday is: " << PersonOne.Birthday<< endl;
cout << "Phone number is: " << PersonOne.PhoneNum<< endl;
return 0;
}
Output
First name is: John
Last name is: Doe
Birthday is: 12/30/1978
Phone number is: 5855555

3. Using functions in structure
// File Name: ~ftp/pub/class/cplusplus/Structure/StrucSimple.cpp
// Purpose: Demonstrates the use of funciton in C++ struct.
// Stores some personal data in a structure, then prints
// the info out.
#include <iostream>
using namespace std;
int main()
{
struct PersonalData
{
char *FirstName;
char *LastName;
char *Birthday; // in the format of 12/30/1978
int PhoneNum;
// struc can also have member functions
void PrintDat()
{
// Print the data out
cout << "First name is: " << FirstName << endl;
cout << "Last name is: " << LastName << endl;
cout << "Birthday is: " << Birthday << endl;
cout << "Phone number is: " << PhoneNum << endl;
}
}; // don't forget the ending ";"
// Declaring a variable of type PersonalData
PersonalData PersonOne;
// Populate PersonOne with data
PersonOne.FirstName = "John";
PersonOne.LastName = "Doe";
PersonOne.Birthday = "12/30/1978";
PersonOne.PhoneNum = 5855555;
PersonOne.PrintDat();
return 0;
}

Output

First name is: John
Last name is: Doe
Birthday is: 12/30/1978
Phone number is: 5855555