How To Use User define Data Types Structure in Cpp With Example

How To Use User define Data Types Structure in Cpp With Example

Structure: A C++ Language structure is another user-defined data type available in C++ that allows combining data elements of different types.

Structures are used to represent a record. Like you want to keep record your books in a library.

The structure is a collection of data from different data types. The structure is a user-defined data type.

we can access members of the structure by making the variable of structure.

The structure can be used Keywords struct.

Book ID

Title

Subject

Author

Definition of Structure: A structure defines you must use the struct keyword in the statement. 

A struct keyword defines a new data type with more than one Elements. The format of the struct keyword statement.

Structure Syntax 

struct [structure_Name] 

{

data_type variable 1;

data_type variable 2;

data_type variable 3;

};

Structure Syntax  Example

struct Book

{

int book_id;

char book_title[100];

char book_name[100];

char book_author[100];

};

A structure is optional and each data types definition is a normal variable definition. 

At the end of the structure's definition, before the final semicolon(;).

We can use specify one or more structure variables but it is optional. 

How To Use Structure in C++ Language?

#include<iostream>

using namespace std;

#include<string.h> 

struct Book

{ 

int book_id;

char book_title[100]; 

char book_name[100]; 

char book_author[100]; 

}; 

int main( ) 

{ 

struct Book B; 

B.book_id = 667407; 

strcpy( B.book_title, "C++ Programming Language"); 

strcpy( B.book_name, "Cpp Language"); 

strcpy( B.book_author ",Bala Swami"); 

cout<<"Book ID:"<<B.book_id<<"\n";

cout<<"Book Title:"<<B.book_title<<"\n"; 

cout<<"Book Name:"<<B.book_name<<"\n";

cout<<"Book Author:"<<B.book_author<<"\n";

 }

*****OUTPUT*****

Book ID: 667407 

Book Title: C++ Programming Language 

Book Name: Cpp Language Book 

Author: Bala Swami 

Structures Function Arguments

A Structure-function argument can be used in the same way as we can pass any other variable.

How To Use Structure Function in C++ Language?

#include<iostream>

using namespace std;

#include<string.h>

struct student 

{ 

int s_id; 

char sname[50]; 

char sfname[50]; 

char smname[100]; 

}; 

void printdetails( struct student s); 

int main( ) 

{ 

struct student s1; 

struct student s2; 

s1.s_id=63633; 

strcpy(s1.sname, "Jitendra"); 

strcpy(s1.sfname, "Sohan"); 

strcpy(s1.smname,"Geeta"); 

s2.s_id=6367833; 

strcpy(s2.sname, "Rohan"); 

strcpy(s2.sfname, "Sohan"); 

strcpy(s2.smname,"Rekha"); 

printdetails(s1);

printdetails(s2); 

return 0; 

} 

void print details( struct student s ) 

{ 

cout<<"Student Id :"<<s.s_id<<"\n"; 

cout<<"Student Name :"<<s.sname<<"\n";

cout<<"Student Father Name :"<<s.sfname<<"\n";

cout<<"Student Mother Name:"<<s.smname<<"\n";

}

*****OUTPUT*****

Student Id: 63633 

Student Name : Jitendra 

Student Father Name: Sohan 

Student Mother Name: Geeta 

Student Id: 6367833 

Student Name: Rohan 

Student Father Name: Sohan 

Student Mother Name: Rekha 

How do we write a C++ program to print patient's records using Structure?

#include<iostream>

using namespace std;

#include<string.h>

struct parents 

{ 

char sname[100]; 

char fname[100]; 

char mname[100]; 

char faddress[200]; 

int faddhar_num; 

int fmobile_no; 

int mmobil_no; 

}; 

int main() 

{ 

struct parents p; 

strcpy(p.sname,"Shubham"); 

strcpy(p.fname,"Ramesh"); 

strcpy(p.mname,"Radhika"); 

strcpy(p.faddress,"Delhi"); 

p.faddhar_num=67574357; 

p.fmobile_no=96905657; 

p.mmobil_no=9787877; 

cout<<"Student Name:"<<p.sname<<"\n";

cout<<"Student Father Name:"<<p.fname<<"\n";

cout<<"Student Mother Name:"<<p.mname<<"\n";

cout<<"Student Father Addresd:"<<p.faddress<<"\n";

cout<<"Student Father Aadhar Number:"<<p.faddhar_num<<"\n";

cout<<"Student Father Mobile Number:"<<p.fmobile_no<<"\n";

cout<<"Student Mother Mobile Number:"<<p.mmobil_no<<"\n";

} 

*****OUTPUT*****

Student Name: Shubham 

Student Father Name: Ramesh 

Student Mother Name: Radhika 

Student Father Address: Delhi 

Student Father Aadhar Number:67574357 

Student Father Mobile Number:96905657 

Student Mother Mobile Number:9787877