Improved example solution for task 6.01 (thanks to FG)

ch_6/task_01/main.c

@@ -63,9 +63,17 @@ double get_perimeter (struct triangle *trngl) {
 double get_area (struct triangle *trngl) {
     /* First calculate the height of the triangle */
     double s = get_perimeter(trngl) / 2;
-    double h_c = (2.0 / trngl->c) * sqrt(s * (s-trngl->a) * (s-trngl->b) * (s-trngl->c));
-    /* Calculate the actual area using the height */
-    return ((trngl->c * h_c) / 2.0);
+    /* Calculate the actual area using the height (simplified) */
+    return sqrt(s * (s-trngl->a) * (s-trngl->b) * (s-trngl->c));
+    /* The calculation above is a simplified combination of the calculation of
+     * the height of the side c (h_c) and the area calculation based on h_c.
+     * 
+     * double h_c = (2.0 / trngl->c) * sqrt(s * (s-trngl->a) * (s-trngl->b) * (s-trngl->c));
+     * double area = (trngl->c * h_c) / 2.0;
+     * 
+     * If you use the equation for h_c in the equation for area, you can cross
+     * out (2.0 / trngl->c) with (trngl->c / 2.0)!
+     */
 }