feat(solutions): add triangle-type/c/function

challenges/triangle-type/solutions/c/function/README.md

@@ -0,0 +1,3 @@
+# triangle-type/c/function
+
+Created by [@Divlo](https://github.com/Divlo) on 30 September 2021.

challenges/triangle-type/solutions/c/function/solution.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+char* triangle_type(int triangle_sides[3]) {
+  if ((triangle_sides[0] + triangle_sides[1] < triangle_sides[2]) || (triangle_sides[2] + triangle_sides[0] < triangle_sides[1]) || (triangle_sides[2] + triangle_sides[1] < triangle_sides[0])) {
+    return "impossible";
+  }
+
+  if (triangle_sides[0] == triangle_sides[1] && triangle_sides[1] == triangle_sides[2]) {
+    return "equilateral";
+  }
+
+  if (triangle_sides[0] == triangle_sides[1] || triangle_sides[1] == triangle_sides[2] || triangle_sides[2] == triangle_sides[0]) {
+    return "isosceles";
+  }
+
+  return "scalene";
+}
+
+int main() {
+  int triangle_sides[3] = {};
+  for (size_t index = 0; index < 3; index++) {
+    scanf("%d", &triangle_sides[index]);
+  }
+  printf("%s\n", triangle_type(triangle_sides));
+  return EXIT_SUCCESS;
+}

challenges/triangle-type/solutions/typescript/function/README.md

@@ -1,3 +0,0 @@
-# triangle-type/typescript/function
-
-Created by [@Divlo](https://github.com/Divlo) on 30 June 2021.

challenges/triangle-type/solutions/typescript/function/solution.ts

@@ -1,54 +0,0 @@
-import readline from 'node:readline'
-
-const removeByIndex = <T = unknown>(array: T[], index: number): T[] => {
-  const result = [...array]
-  result.splice(index, 1)
-  return result
-}
-
-type TriangleType = 'impossible' | 'equilateral' | 'isosceles' | 'scalene'
-
-class Triangle {
-  public sides: number[]
-  public type: TriangleType
-
-  constructor(sides: number[]) {
-    this.sides = sides
-    this.type = this.getType()
-  }
-
-  private getType(): TriangleType {
-    const largestSide = Math.max(...this.sides)
-    const largestSideIndex = this.sides.findIndex((side) => side === largestSide)
-    const otherSides = removeByIndex(this.sides, largestSideIndex)
-    const isImpossible = otherSides[0] + otherSides[1] < largestSide
-    if (isImpossible) {
-      return 'impossible'
-    }
-    const uniqueSides = [...new Set(this.sides)]
-    const isEquilateral = uniqueSides.length === 1
-    const isIsocseles = uniqueSides.length === 2
-    if (isEquilateral) {
-      return 'equilateral'
-    }
-    if (isIsocseles) {
-      return 'isosceles'
-    }
-    return 'scalene'
-  }
-}
-
-const triangleSides: number[] = []
-const readlineInterface = readline.createInterface({
-  input: process.stdin,
-  output: process.stdout
-})
-readlineInterface.on('line', (value) => {
-  triangleSides.push(Number(value))
-})
-readlineInterface.on('close', solution)
-
-function solution(): void {
-  const triangle = new Triangle(triangleSides)
-  console.log(triangle.type)
-}