Chapter 7 Exercise Set 2: Doctest Exercises¶

We introduced doctest in Chapter 5 Extention: Introducing doctest. Review that section if you are not yet familiar with it.

Create a file named test_struct_functions.cpp with the following scaffolding and then modify it according to the given problem:

#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#include <string>
#include <doctest.h>
using namespace std;

// Your function goes here

TEST_CASE("...") {
    CHECK(...);
}

Using the Point structure introduced in Point objects, Add the following test case for the function distance_from_origin(Point) that takes a Point, p, as an argument, and returns its distance from the origin, (0, 0) (Note: You’ll have to add: #include <cmath> to be able to use the exponential functions you’ll need for this function).
```
TEST_CASE("distance_from_origin(p) returns p's distance from (0, 0) ") {
    p = Point{3, 4};
    CHECK(distance_from_origin(p) == 5.0);
    p2 = Point{5, 12};
    CHECK(distance_from_origin(p2) == 13.0);
    p3 = Point{65, 72};
    CHECK(distance_from_origin(p3) == 97.0);
}
```
Now add your own test case for the more general distance(Point, Point) function discussed in Structues as parameters.