solution-template.go

// Package challenge10 contains the solution for Challenge 10.
package challenge10

import (
	"fmt"
	// Add any necessary imports here
)

// Shape interface defines methods that all shapes must implement
type Shape interface {
	Area() float64
	Perimeter() float64
	fmt.Stringer // Includes String() string method
}

// Rectangle represents a four-sided shape with perpendicular sides
type Rectangle struct {
	Width  float64
	Height float64
}

// NewRectangle creates a new Rectangle with validation
func NewRectangle(width, height float64) (*Rectangle, error) {
	// TODO: Implement validation and construction
	return nil, nil
}

// Area calculates the area of the rectangle
func (r *Rectangle) Area() float64 {
	// TODO: Implement area calculation
	return 0
}

// Perimeter calculates the perimeter of the rectangle
func (r *Rectangle) Perimeter() float64 {
	// TODO: Implement perimeter calculation
	return 0
}

// String returns a string representation of the rectangle
func (r *Rectangle) String() string {
	// TODO: Implement string representation
	return ""
}

// Circle represents a perfectly round shape
type Circle struct {
	Radius float64
}

// NewCircle creates a new Circle with validation
func NewCircle(radius float64) (*Circle, error) {
	// TODO: Implement validation and construction
	return nil, nil
}

// Area calculates the area of the circle
func (c *Circle) Area() float64 {
	// TODO: Implement area calculation
	return 0
}

// Perimeter calculates the circumference of the circle
func (c *Circle) Perimeter() float64 {
	// TODO: Implement perimeter calculation
	return 0
}

// String returns a string representation of the circle
func (c *Circle) String() string {
	// TODO: Implement string representation
	return ""
}

// Triangle represents a three-sided polygon
type Triangle struct {
	SideA float64
	SideB float64
	SideC float64
}

// NewTriangle creates a new Triangle with validation
func NewTriangle(a, b, c float64) (*Triangle, error) {
	// TODO: Implement validation and construction
	return nil, nil
}

// Area calculates the area of the triangle using Heron's formula
func (t *Triangle) Area() float64 {
	// TODO: Implement area calculation using Heron's formula
	return 0
}

// Perimeter calculates the perimeter of the triangle
func (t *Triangle) Perimeter() float64 {
	// TODO: Implement perimeter calculation
	return 0
}

// String returns a string representation of the triangle
func (t *Triangle) String() string {
	// TODO: Implement string representation
	return ""
}

// ShapeCalculator provides utility functions for shapes
type ShapeCalculator struct{}

// NewShapeCalculator creates a new ShapeCalculator
func NewShapeCalculator() *ShapeCalculator {
	// TODO: Implement constructor
	return nil
}

// PrintProperties prints the properties of a shape
func (sc *ShapeCalculator) PrintProperties(s Shape) {
	// TODO: Implement printing shape properties
}

// TotalArea calculates the sum of areas of all shapes
func (sc *ShapeCalculator) TotalArea(shapes []Shape) float64 {
	// TODO: Implement total area calculation
	return 0
}

// LargestShape finds the shape with the largest area
func (sc *ShapeCalculator) LargestShape(shapes []Shape) Shape {
	// TODO: Implement finding largest shape
	return nil
}

// SortByArea sorts shapes by area in ascending or descending order
func (sc *ShapeCalculator) SortByArea(shapes []Shape, ascending bool) []Shape {
	// TODO: Implement sorting shapes by area
	return nil
}