area.cpp File Reference

Implementations for the area of various shapes. More...

#include <cassert>
#include <cmath>
#include <cstdint>
#include <iostream>

Include dependency graph for area.cpp:

Go to the source code of this file.

Namespaces
namespace	math
	for assert

Functions
template<typename T >
T	math::square_area (T length)
	area of a square (l * l)
template<typename T >
T	math::rect_area (T length, T width)
	area of a rectangle (l * w)
template<typename T >
T	math::triangle_area (T base, T height)
	area of a triangle (b * h / 2)
template<typename T >
T	math::circle_area (T radius)
	area of a circle (pi
template<typename T >
T	math::parallelogram_area (T base, T height)
	area of a parallelogram (b * h)
template<typename T >
T	math::cube_surface_area (T length)
	surface area of a cube ( 6 * (l
template<typename T >
T	math::sphere_surface_area (T radius)
	surface area of a sphere ( 4 * pi * r^2)
template<typename T >
T	math::cylinder_surface_area (T radius, T height)
	surface area of a cylinder (2 * pi * r * h + 2 * pi * r^2)
template<typename T >
T	math::hemi_sphere_surface_area (T radius)
	surface area of a hemi-sphere ( 3 * pi * r^2)
static void	test ()
	Self-test implementations.
int	main ()
	Main function.

Detailed Description

Implementations for the area of various shapes.

The area of a shape is the amount of 2D space it takes up. All shapes have a formula to get the area of any given shape. These implementations support multiple return types.

Author

Focusucof

Definition in file area.cpp.

Macro Definition Documentation

_USE_MATH_DEFINES

#define _USE_MATH_DEFINES

Definition at line 11 of file area.cpp.

Function Documentation

main()

int main

(

void

)

Main function.

Returns

0 on exit

Definition at line 300 of file area.cpp.

           {
    test();  // run self-test implementations
    return 0;
}

test()

static void test ( )

static

Self-test implementations.

Returns

void

Definition at line 130 of file area.cpp.

                   {
    // I/O variables for testing
    uint16_t int_length = 0;    // 16 bit integer length input
    uint16_t int_width = 0;     // 16 bit integer width input
    uint16_t int_base = 0;      // 16 bit integer base input
    uint16_t int_height = 0;    // 16 bit integer height input
    uint16_t int_expected = 0;  // 16 bit integer expected output
    uint16_t int_area = 0;      // 16 bit integer output
 
    float float_length = NAN;    // float length input
    float float_expected = NAN;  // float expected output
    float float_area = NAN;      // float output
 
    double double_length = NAN;    // double length input
    double double_width = NAN;     // double width input
    double double_radius = NAN;    // double radius input
    double double_height = NAN;    // double height input
    double double_expected = NAN;  // double expected output
    double double_area = NAN;      // double output
 
    // 1st test
    int_length = 5;
    int_expected = 25;
    int_area = math::square_area(int_length);
 
    std::cout << "AREA OF A SQUARE (int)" << std::endl;
    std::cout << "Input Length: " << int_length << std::endl;
    std::cout << "Expected Output: " << int_expected << std::endl;
    std::cout << "Output: " << int_area << std::endl;
    assert(int_area == int_expected);
    std::cout << "TEST PASSED" << std::endl << std::endl;
 
    // 2nd test
    float_length = 2.5;
    float_expected = 6.25;
    float_area = math::square_area(float_length);
 
    std::cout << "AREA OF A SQUARE (float)" << std::endl;
    std::cout << "Input Length: " << float_length << std::endl;
    std::cout << "Expected Output: " << float_expected << std::endl;
    std::cout << "Output: " << float_area << std::endl;
    assert(float_area == float_expected);
    std::cout << "TEST PASSED" << std::endl << std::endl;
 
    // 3rd test
    int_length = 4;
    int_width = 7;
    int_expected = 28;
    int_area = math::rect_area(int_length, int_width);
 
    std::cout << "AREA OF A RECTANGLE (int)" << std::endl;
    std::cout << "Input Length: " << int_length << std::endl;
    std::cout << "Input Width: " << int_width << std::endl;
    std::cout << "Expected Output: " << int_expected << std::endl;
    std::cout << "Output: " << int_area << std::endl;
    assert(int_area == int_expected);
    std::cout << "TEST PASSED" << std::endl << std::endl;
 
    // 4th test
    double_length = 2.5;
    double_width = 5.7;
    double_expected = 14.25;
    double_area = math::rect_area(double_length, double_width);
 
    std::cout << "AREA OF A RECTANGLE (double)" << std::endl;
    std::cout << "Input Length: " << double_length << std::endl;
    std::cout << "Input Width: " << double_width << std::endl;
    std::cout << "Expected Output: " << double_expected << std::endl;
    std::cout << "Output: " << double_area << std::endl;
    assert(double_area == double_expected);
    std::cout << "TEST PASSED" << std::endl << std::endl;
 
    // 5th test
    int_base = 10;
    int_height = 3;
    int_expected = 15;
    int_area = math::triangle_area(int_base, int_height);
 
    std::cout << "AREA OF A TRIANGLE" << std::endl;
    std::cout << "Input Base: " << int_base << std::endl;
    std::cout << "Input Height: " << int_height << std::endl;
    std::cout << "Expected Output: " << int_expected << std::endl;
    std::cout << "Output: " << int_area << std::endl;
    assert(int_area == int_expected);
    std::cout << "TEST PASSED" << std::endl << std::endl;
 
    // 6th test
    double_radius = 6;
    double_expected =
        113.09733552923255;  // rounded down because the double datatype
                             // truncates after 14 decimal places
    double_area = math::circle_area(double_radius);
 
    std::cout << "AREA OF A CIRCLE" << std::endl;
    std::cout << "Input Radius: " << double_radius << std::endl;
    std::cout << "Expected Output: " << double_expected << std::endl;
    std::cout << "Output: " << double_area << std::endl;
    assert(double_area == double_expected);
    std::cout << "TEST PASSED" << std::endl << std::endl;
 
    // 7th test
    int_base = 6;
    int_height = 7;
    int_expected = 42;
    int_area = math::parallelogram_area(int_base, int_height);
 
    std::cout << "AREA OF A PARALLELOGRAM" << std::endl;
    std::cout << "Input Base: " << int_base << std::endl;
    std::cout << "Input Height: " << int_height << std::endl;
    std::cout << "Expected Output: " << int_expected << std::endl;
    std::cout << "Output: " << int_area << std::endl;
    assert(int_area == int_expected);
    std::cout << "TEST PASSED" << std::endl << std::endl;
 
    // 8th test
    double_length = 5.5;
    double_expected = 181.5;
    double_area = math::cube_surface_area(double_length);
 
    std::cout << "SURFACE AREA OF A CUBE" << std::endl;
    std::cout << "Input Length: " << double_length << std::endl;
    std::cout << "Expected Output: " << double_expected << std::endl;
    std::cout << "Output: " << double_area << std::endl;
    assert(double_area == double_expected);
    std::cout << "TEST PASSED" << std::endl << std::endl;
 
    // 9th test
    double_radius = 10.0;
    double_expected = 1256.6370614359172;  // rounded down because the whole
                                           // value gets truncated
    double_area = math::sphere_surface_area(double_radius);
 
    std::cout << "SURFACE AREA OF A SPHERE" << std::endl;
    std::cout << "Input Radius: " << double_radius << std::endl;
    std::cout << "Expected Output: " << double_expected << std::endl;
    std::cout << "Output: " << double_area << std::endl;
    assert(double_area == double_expected);
    std::cout << "TEST PASSED" << std::endl << std::endl;
 
    // 10th test
    double_radius = 4.0;
    double_height = 7.0;
    double_expected = 276.46015351590177;
    double_area = math::cylinder_surface_area(double_radius, double_height);
 
    std::cout << "SURFACE AREA OF A CYLINDER" << std::endl;
    std::cout << "Input Radius: " << double_radius << std::endl;
    std::cout << "Input Height: " << double_height << std::endl;
    std::cout << "Expected Output: " << double_expected << std::endl;
    std::cout << "Output: " << double_area << std::endl;
    assert(double_area == double_expected);
    std::cout << "TEST PASSED" << std::endl << std::endl;
 
    // 11th test
    double_radius = 10.0;
    double_expected = 942.4777960769379;
    double_area = math::hemi_sphere_surface_area(double_radius);
 
    std::cout << "SURFACE AREA OF A HEMI-SPHERE" << std::endl;
    std::cout << "Input Radius: " << double_radius << std::endl;
    std::cout << "Expected Output: " << double_expected << std::endl;
    std::cout << "Output: " << double_area << std::endl;
    assert(double_area == double_expected);
    std::cout << "TEST PASSED" << std::endl << std::endl;
}