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Vector: Difference between revisions
→{{header|Nim}}
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[55.0, 77.0]
[2.5, 3.5]</pre>
=={{header|Nim}}==
<lang Nim>import strformat
type Vec2[T: SomeNumber] = tuple[x, y: T]
proc initVec2[T](x, y: T): Vec2[T] = (x, y)
func`+`[T](a, b: Vec2[T]): Vec2[T] = (a.x + b.x, a.y + b.y)
func `-`[T](a, b: Vec2[T]): Vec2[T] = (a.x - b.x, a.y - b.y)
func `*`[T](a: Vec2[T]; m: T): Vec2[T] = (a.x * m, a.y * m)
func `/`[T](a: Vec2[T]; d: T): Vec2[T] =
if d == 0:
raise newException(DivByZeroDefect, "division of vector by 0")
when T is SomeInteger:
(a.x div d, a.y div d)
else:
(a.x / d, a.y / d)
func `$`[T](a: Vec2[T]): string =
&"({a.x}, {a.y})"
# Three ways to initialize a vector.
let v1 = initVec2(2, 3)
let v2: Vec2[int] = (-1, 2)
let v3 = (x: 4, y: -2)
echo &"{v1} + {v2} = {v1 + v2}"
echo &"{v3} - {v2} = {v3 - v2}"
# Float vectors.
let v4 = initVec2(2.0, 3.0)
let v5 = (x: 3.0, y: 2.0)
echo &"{v4} * 2 = {v4 * 2}"
echo &"{v3} / 2 = {v3 / 2}" # Int division.
echo &"{v5} / 2 = {v5 / 2}" # Float division.</lang>
{{out}}
<pre>(2, 3) + (-1, 2) = (1, 5)
(4, -2) - (-1, 2) = (5, -4)
(2.0, 3.0) * 2 = (4.0, 6.0)
(4, -2) / 2 = (2, -1)
(3.0, 2.0) / 2 = (1.5, 1.0)</pre>
=={{header|Objeck}}==
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