Question

2) Write an algorithm to compute the area of circles. Your algorithm should prompt the user to take the number of circles and their radius values. Then it should compute the areas of each circle. Finally, your algorithm will print both radius and area of all circles into the output. [N.B. you need to use iterative statement for solving the problem. Consider Pi = 3.14159] Input: Area of how many Circles you want to compute? 3 Key in radius values: 2.5 3.12 2.16 Output: Radius is 2.5 and the Area is 19.63 Radius is 3.12 and the Area is 30.76 Radius is 2.16 and the Area is 14.65

C program

Answer 1

If you need any corrections/ clarifications kindly comment.

If you like the answer please give a Thumps Up

Algorithm

Step1 : Start

Step 2: Read into n, the area of how many Circles to be computed.
Step 3: Read the radius values into array radius[n].
Step 4:Calculate the area of each circle , area=3.14*radius²
Step 5:Print the radius and area of each circle.
Step 6: Stop

C Program

#include <stdio.h>

int main()
{
    int n,i;
    float pi=3.14;
    printf("Area of how many Circles you want to compute?");
    scanf("%d",&n);
    float radius[n],area[n];
    printf("Enter the %d radius values :",n);
    for(i=0;i<n;i++)
    {
    scanf("%f",&radius[i]);
    area[i]=pi* radius[i]*radius[i];
    }
    for(i=0;i<n;i++)
    printf("Radius is %.2f and the area is %.2f\n",radius[i],area[i]);
    return 0;
}

Output

Area of how many Circles you want to compute?3
Enter the 3 radius values :2.5 3.12 2.16
Radius is 2.50 and the area is 19.62
Radius is 3.12 and the area is 30.57
Radius is 2.16 and the area is 14.65