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assignment-s-11.c

Problem Statement

Write a program that takes the radius of a circle as input, passes it to a function that computes area and circumference, and displays results in main().

Metadata

Property Detail
Author Amit Dutta (amitdutta4255@gmail.com)
License MIT
Difficulty Beginner (index: 2 / 10)

Concepts

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  • Recursion
  • Pointers

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Source Code

#include <stdio.h>
#include <math.h>

void area_circumference(double, double *, double *);

int main()
{
    double r, area, circumference;
    printf("Enter the radius of the circle: ");
    scanf("%lf", &r);
    area_circumference(r, &area, &circumference);
    printf("\nArea of the circle = %g", area);
    printf("\nCircumference of the circle = %g", circumference);
    return 0;
}

void area_circumference(double r, double *area, double *circumference)
{
    *area = M_PI * r * r;
    *circumference = 2 * M_PI * r;
}

Explanation

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    You are explaining a C programming code to a beginner.

    STRICT RULES:

    - Only use the given code. Do NOT assume anything not present.

    - Do NOT add extra examples.

    - Keep explanation clear and short.

    - If something is unclear, say "Not clear from code".

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    FORMAT:

    [START]

    ## What it does

    (Explain the overall purpose in 1-2 sentences)

    ## Step-by-step

    (Explain how the code works in steps, simple language)

    ## Key Concepts

    (List concepts like loop, condition, function, etc.)

    ## Notes

    (Mention any limitations, errors, or assumptions)

    [END]

    CODE (assignment-s-11.c):

    #include <stdio.h>
    #include <math.h>

    void area_circumference(double, double *, double *);

    int main()
    {
        double r, area, circumference;
        printf("Enter the radius of the circle: ");
        scanf("%lf", &r);
        area_circumference(r, &area, &circumference);
        printf("\nArea of the circle = %g", area);
        printf("\nCircumference of the circle = %g", circumference);
        return 0;
    }

    void area_circumference(double r, double *area, double *circumference)
    {
        *area = M_PI * r * r;
        *circumference = 2 * M_PI * r;
    }