Erreur sur le merger, 1er groupe bizarre et 2eme groupe ok... why???

opti.c

 #include "opti.h"
-int LINE_POINTS = 1000000;
-int CLOUD_POINTS = 300;
+
+int CLOUD_POINTS = 5000;
 double X_VALUE = 0.000001;
 double RANDOMNESS = 0.01;
 // Learning rate
-double LR = 0.00001;
+double LR = 0.0001;
 // Error rate
-double ER = 0.0000000001;
+double ER = 0.000001;
 
 // La fonction pow() de math.h avait un problème aavec mon Makefile donc je l'ai refaite
 // et puis après avoir résolu le problème (emplacement du -lm) afin de pouvoir utiliser
@@ -143,6 +143,24 @@ double cost2(double *a, double *b, double *new_a, double *new_b){
     return sqrt(popow((*new_a - *a),2)+popow((*new_b - *b), 2));
 } 
 
+Point* cloud_merger(Point* cloud_a, Point* cloud_b, bool g3_here){
+    int cloud_size;
+    if(!g3_here){
+        cloud_size = 2*(CLOUD_POINTS)/3;
+    }else{
+        cloud_size = CLOUD_POINTS-(CLOUD_POINTS/3);
+    }
+    Point * merged_cloud = (Point*)malloc(sizeof(Point)*cloud_size);
+    for(int i=0;i<cloud_size;i++){
+        if(i<(CLOUD_POINTS/3)){
+            merged_cloud[i]=cloud_a[i];
+        }else{
+            merged_cloud[i]=cloud_b[i-(CLOUD_POINTS/3)];
+        }
+    }
+    return merged_cloud;
+}
+
 int main (void){
     srand(time(NULL));
     /*// Create a vector X = [0,1,2...99]
@@ -159,26 +177,36 @@ int main (void){
     destroy_vector(&X);
     */
     //Le a et le b calculé sur mon papier;
-    //double a_init = 0.98902527076;
-    //double b_init = -0.1537833935;
+    double a_init = 0.98902527076;
+    double b_init = -0.1537833935;
     //Point* fluffy = cloud_test();
-    //printf("\na initial = %f || b initial = %f\n", a_init, b_init);
+    printf("\na optimal = %f || b optimal = %f\n", a_init, b_init);
     double a = double_random(0,1);
     double b = double_random(0,1);
+    double c = a;
+    double d = b;
     
-    Point* fluffy = cloud2_5(&a, &b);
-    printf("\na random initial = %f || b random initial = %f\n", a, b);
-    //gradient_descent_v4(&a, &b, fluffy);
-    //printf("\na trouvé = %f || b trouvé = %f\n", a, b);
+    Point* fluffy = cloud2_5(&a_init, &b_init);
+    //printf("\na random initial = %f || b random initial = %f\n", a, b);
     Point** cloud_slayer = cloud_splitter(fluffy);
-    for(int j=0;j<3;j++){
+    /*for(int j=0;j<3;j++){
         for(int i=0; i<CLOUD_POINTS/3;i++){
             printf("\nG%d x = %g\nG%d y = %g\n", j+1,cloud_slayer[j][i].x , j+1, cloud_slayer[j][i].y);
         }
+    }*/
+    Point* merged = cloud_merger(cloud_slayer[0], cloud_slayer[1], false);
+    for(int i=0;i<CLOUD_POINTS*2/3;i++){
+        printf("\nMERGED : x=%g  y=%g\n", merged[i].x, merged[i].y);
     }
+    //gradient_descent_v4(&a, &b, fluffy);
+    gradient_descent_v4(&a, &b, merged);
+    gradient_descent_v4(&c, &d, cloud_slayer[2]);
+    printf("\na1 trouvé = %f || b1 trouvé = %f\n", a, b);
+    printf("\na2 trouvé = %f || b2 trouvé = %f\n", c, d);
     //printf("\nx = %g\ny = %g\n",cloud_slayer[0][1].x , cloud_slayer[0][1].y);
-    printf("\ndone\n");
-    free(fluffy);
+    free(merged);
     free(cloud_slayer);
+    free(fluffy);
+    printf("\ndone\n");
     return 0;
 }
\ No newline at end of file

opti.h

@@ -33,5 +33,6 @@ double cost(double *a, double *b, Point* my_cloud);
 void gradient_descent_v4(double *a, double *b, Point* my_cloud);
 double cost2(double *a, double *b, double *new_a, double *new_b);
 Point ** cloud_splitter(Point* my_cloud);
+Point* cloud_merger(Point* cloud_a, Point* cloud_b, bool g3_here);
 
 #endif
\ No newline at end of file