pow

C/opti.c

@@ -90,6 +90,6 @@ couple deriver(double_vector_t* X, double_vector_t* Y){
 double erreur_quad(couple a, double_vector_t *X, double_vector_t *Y){
 	double somme = 0;
 	for (int i = 0; i < X->N; i++){
-		somme += (a.a * X->components[i] + a.b - Y->components[i])*(a.a * X->components[i] + a.b - Y->components[i]);
+		somme += pow((a.a * X->components[i] + a.b - Y->components[i]), 2);
 	}
 }
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