Sums added

opti.c

@@ -117,6 +117,22 @@ double* a_and_b(double* my_averages){
     return a_n_b;
 }
 
+// Sommes (similaire à averages() mais ne divise pas par le nb de points)
+double* sums(Point* my_cloud, int cloud_size){
+    //double* avg = (double*)malloc(sizeof(double)*4);
+    double* my_sums = malloc(sizeof(double)*4);
+    double x, y, x2, xy;
+    for(int i=0; i<cloud_size-1;i++){
+        x+=my_cloud[i].x;
+        y+=my_cloud[i].y;
+        x2+=popow(my_cloud[i].x,2);
+        xy+=(my_cloud[i].x*my_cloud[i].y);
+    }
+    my_sums[0]=x;my_sums[1]=y;my_sums[2]=x2;my_sums[3]=xy;
+    printf("x=%f - y=%f - x2=%f - xy=%f", my_sums[0],my_sums[1],my_sums[2],my_sums[3]);
+    return my_sums;
+}
+
 double slope(){
 return 0.0;
 }