Simple Example Program for Area Of Circle Using Pointer In C++

About this program

This is an example program in c pointer example programs. Read the concept first: Pointer Example Program in C++, then study the code and output below.

Syntax

//Function - Pass By Reference
void fn_name(int *var1,int *var2)
{
   // Code
}

//Main Code- Pass By Reference
fn_name(&orginal_var1,&orginal_var2);

Simple Example Program for Area Of Circle Using Pointer

/*##Simple Example Program for Area Of Circle Using Pointer In C++*/
/*##Simple Area Of Circle C++ Program,pointers Example C++ Programming*/
/*##Pass By Reference C++ Function Example Program In C++ Programming*/

// Header Files
#include <iostream>
#include<conio.h>

using namespace std;

// Declare Area of Circle Function Using Pointer 

void area_of_circle(float *value, float *result) {
   *result = 3.14 * (*value) * (*value);
}

int main() {
   float radius, area;

   cout << "Pointer Example C++ Program : Area Of Circle Using Pointer and Functions\n";

   cout << "\nEnter the radius of Circle : ";
   cin>>radius;

   //area = 3.14 * radius * radius;
   area_of_circle(&radius, &area);

   cout << "\nArea of Circle : " << area;

   getch();
   return 0;
}

Sample Output

Pointer Example C++ Program : Area Of Circle Using Pointer and Functions

Enter the radius of Circle : 5

Area of Circle : 78.5

How It Works

This C++ program demonstrates Simple for Area Of Circle Using Pointer. It first reads the required values as input, then performs the core operation step by step, and finally prints the output shown in the Sample Output above.

1. Declare the variables that hold the program’s data.
2. Read the input values that the program will work with.
3. Print the final result to the console so you can compare it with the sample output.

Try changing the input values and re-running the program to see how the output changes — this is the fastest way to understand how the logic behaves.

Related Pages

Learn the concept first, then study the code:

• C++ Programs — Browse all C++ Programs.
• Pointer Example Program in C++ — Concept — pointers, addresses and dereferencing in C++.
• Simple Program for Print address of Variable Using Pointer in C++ — More in c pointer example programs.
• Pointer Simple Example Program with Reference operator (&) and Dereference operator (*) — More in c pointer example programs.