canviat abs per fabs

source/ball.cpp

@@ -1,5 +1,8 @@
 #include "ball.h"
-#include "defines.h"
+#include <stdlib.h>   // for rand
+#include <cmath>    // for fabs
+#include "defines.h"  // for BALL_SIZE, Color, SCREEN_HEIGHT, GRAVITY_FORCE
+class Texture;
 
 // Constructor
 Ball::Ball(float x, float vx, float vy, Color color, std::shared_ptr<Texture> texture)
@@ -62,7 +65,7 @@ void Ball::update()
     {
         pos_.y = SCREEN_HEIGHT - pos_.h;
         vy_ = -vy_ * loss_;
-        if (abs(vy_) < 0.1f)
+        if (std::fabs(vy_) < 0.1f)
         {
             vy_ = 0.0f;
             on_floor_ = true;
@@ -73,7 +76,7 @@ void Ball::update()
     if (on_floor_)
     {
         vx_ = vx_ * 0.97f;
-        if (abs(vx_) < 0.1f)
+        if (std::fabs(vx_) < 0.1f)
         {
             vx_ = 0.0f;
             stopped_ = true;