C++ Exercises: Calculate the volume of a sphere

Last update on August 11 2025 12:57:31 (UTC/GMT +8 hours)

Volume of a Sphere

Write a C++ program that calculates the volume of a sphere.

Pictorial Presentation:

C++ Exercises: Calculate the volume of a sphere

Sample Solution:

C++ Code :

#include <iostream> // Including the input-output stream header file

using namespace std; // Using the standard namespace

int main() // Start of the main function
{
    int rad1; // Declaring an integer variable rad1 to store the radius of the sphere
    float volsp; // Declaring a floating-point variable volsp to store the volume of the sphere
    cout << "\n\n Calculate the volume of a sphere :\n"; // Outputting a message indicating the calculation of sphere volume
    cout << "---------------------------------------\n"; // Outputting a separator line

    cout << " Input the radius of a sphere : "; // Prompting the user to input the radius of the sphere
    cin >> rad1; // Taking input for the radius from the user

    // Calculating the volume of the sphere using the formula: (4/3) * π * r^3
    volsp = (4 * 3.14 * rad1 * rad1 * rad1) / 3;

    cout << " The volume of a sphere is : "<< volsp << endl; // Displaying the calculated volume of the sphere
    cout << endl; // Outputting a blank line for better readability

    return 0; // Returning 0 to indicate successful program execution
} // End of the main function

Sample Output:

 Calculate the volume of a sphere :                                    
---------------------------------------                                
 Input the radius of a sphere : 6                                      
 The volume of a sphere is : 904.32

Flowchart:

For more Practice: Solve these Related Problems:

Write a C++ program to compute the volume of a sphere given its diameter instead of radius.
Write a C++ program that calculates the volume of a sphere using a user-defined function for computation.
Write a C++ program to compute the volume of a sphere and then compare it with the volume of a cube of equal edge length.
Write a C++ program that calculates the volume of a sphere using a constant for pi and prints the result with two decimal precision.

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