C++ language |Structure with function

Structure with function in C++ language

In this tutorial, we will discuss the concept of Structure with function in C++ language

a structure variable can be passed to a function as an argument

There are two way to pass a function as argument

passing to a function by value
passing to a function by reference

passing to a function by value

In this case, The structure object is passed as a function argument to the definition of function. “Structure object” represents the structure’s members and their values.

Program 1

Example

In this program, first, variables name, age, marks are declared inside the student structure

Then the user is asked to enter the name, age and marks of a student inside the main() function

Finally structure variable s is to passed to a function

When the above program is executed, it produces the following results

Enter student full name :
Jhon mackal
Enter student s age :
34
Enter student s marks:
88

Display student details
...........................................
student name : Jhon mackal
student age : 34
student marks : 88

Passing to function by reference

In this case, the address(reference) of the structure variables are passed as a function argument to the definition of the function.

Program 2

#include <iostream>
#include <conio.h>
using namespace std;
struct student{
int rgNo;
char gender;
int age;
};
void display (student s);
//Declaration of display function with normal reference
void show (student *s);
//Declaration of show function with pointer reference

int main()
{
    student anil={1122,'m',26};
    display(anil);//Call the display function
    show(&anil);//Call the show function
    getch();
    return 0;
}
void display(student s){
    cout<<"Result using display function"<<endl;
//Definition of display function with normal variable
cout<<s.rgNo<<endl;
cout<<s.gender<<endl;
cout<<s.age<<endl<<endl;
}

void show(student *s){
    cout<<"Result using show function"<<endl;
//Definition of display function with pointer variable
cout<<s->rgNo<<endl;
cout<<s->gender<<endl;
cout<<s->age<<endl;
}

When the above program is executed, it produces the following results.

This output received pass by value