int main ()
{
double xCenter, yCenter, xPoint, yPoint;
scanf( "%lf %lf %lf %lf", & xCenter, & yCenter, & xPoint, & yPoint );
double radius = getDistance( xCenter, yCenter, xPoint, yPoint );
printf( "Circle area - %lf\n", circleArea( radius ) );
return 0;
}
int main(int argc, char *argv[]) {
double r;
printf("What is the radius of circle: ");
scanf("%lf", &r);
printf("|%-10s|%10s|%10s|\n","r", "perimeter", "area");
printf("|%-10.2lf|%10.2lf|%10.2lf|\n", r, circlePerimeter(r), circleArea(r));
return 0;
}
int main(void) {
float r, result;
printf("Enter a radius: ");
scanf("%f", &r);
result = circleArea(r);
printf("The area is %.2f.\n", result);
return 0;
}
double cylinderCapacity(const Cylinder* c)
{
if (!c || c->radius < 0 || c->height < 0) { return -1; }
return circleArea(c->radius) * c->height;
}
double cylinderSurface(const Cylinder* c)
{
if (!c || c->radius < 0 || c->height < 0) { return -1; }
return 2 * circleArea(c->radius) + cylinderLateralArea(c);
}