#include <stdio.h>
#define PI (3.141592654)
int main()
{
float l1, l2, r; // Declare input variable
double area; // Declare output variable 'area'
printf("Rectangle Area Calculation: \n");
printf("Enter value of long side: \n");
scanf("%f", &l1);
printf("Enter value of short side: \n");
scanf("%f", &l2);
area = ( l1 * l2 ) / (100 * 100); // Divide by (100 * 100) to convert to meter
printf("Area of rectangle is %.3lf m\n", area);
printf("\nCircle Area Calculation: \n");
printf("Enter value of radius: ");
scanf("%f", &r);
area = ( PI * r * r ) / (100 * 100); // Divide by (100 * 100) to convert to meter
printf("Area of Circle is %.3lf m\n", area);
printf("\nEllipse Area Calculation: \n");
printf("Enter value of semi-major axis length: ");
scanf("%f", &l1);
printf("Enter value of semi-minor axis length: ");
scanf("%f", &l2);
area = ( PI * l1 * l2 ) / (100 * 100); // Divide by (100 * 100) to convert to meter
printf("Area of ellipse is %.3lf m\n", area);
return 0;
}
