diff --git a/src/cnn/backpropagation.c b/src/cnn/backpropagation.c
index 2285de3..c321538 100644
--- a/src/cnn/backpropagation.c
+++ b/src/cnn/backpropagation.c
@@ -115,9 +115,9 @@ __global__ void backward_average_pooling_kernel(float*** input, float*** output,
     int max_move = kernel_size - padding;
 
     for (int a=-padding; a < max_move; a++) {
-        for (int b=-paddding; b < max_move; b++) {
+        for (int b=-padding; b < max_move; b++) {
             int idy_2 = stride*idy +a;
-            int idz_2 = stride*idz +b:
+            int idz_2 = stride*idz +b;
             if (not_outside(idy_2, idz_2, 0, input_width)) {
                 int y = min(idy_2+1, min(kernel_size, input_width - idy_2));
                 int z = min(idz_2+1, min(kernel_size, input_width - idz_2));
@@ -214,7 +214,7 @@ __global__ void backward_max_pooling_kernel(float*** input, float*** output, int
         }
     }
     if (cpt==0) {
-        printf_error("Dimensions ou stride ou padding erroné dans 'backward_max_pooling_cpu'\n");
+        printf(RED "[ERROR]" RESET " Dimensions ou stride ou padding erroné dans 'backward_max_pooling_cpu'\n");
     }
     input[idx][stride*idy +a_max][stride*idz +b_max] = output[idx][idy][idz]/cpt;
 }
@@ -262,7 +262,7 @@ void backward_max_pooling_cpu(float*** input, float*** output, int input_width,
                     }
                 }
                 if (cpt==0) {
-                    printf_error("Dimensions ou stride ou padding erroné dans 'backward_max_pooling_cpu'\n");
+                    printf_error((char*)"Dimensions ou stride ou padding erroné dans 'backward_max_pooling_cpu'\n");
                 }
                 else {
                     input[i][stride*j +a_max][stride*k +b_max] = output[i][j][k]/cpt;
diff --git a/src/cnn/backpropagation.cu b/src/cnn/backpropagation.cu
index 2285de3..c321538 100644
--- a/src/cnn/backpropagation.cu
+++ b/src/cnn/backpropagation.cu
@@ -115,9 +115,9 @@ __global__ void backward_average_pooling_kernel(float*** input, float*** output,
     int max_move = kernel_size - padding;
 
     for (int a=-padding; a < max_move; a++) {
-        for (int b=-paddding; b < max_move; b++) {
+        for (int b=-padding; b < max_move; b++) {
             int idy_2 = stride*idy +a;
-            int idz_2 = stride*idz +b:
+            int idz_2 = stride*idz +b;
             if (not_outside(idy_2, idz_2, 0, input_width)) {
                 int y = min(idy_2+1, min(kernel_size, input_width - idy_2));
                 int z = min(idz_2+1, min(kernel_size, input_width - idz_2));
@@ -214,7 +214,7 @@ __global__ void backward_max_pooling_kernel(float*** input, float*** output, int
         }
     }
     if (cpt==0) {
-        printf_error("Dimensions ou stride ou padding erroné dans 'backward_max_pooling_cpu'\n");
+        printf(RED "[ERROR]" RESET " Dimensions ou stride ou padding erroné dans 'backward_max_pooling_cpu'\n");
     }
     input[idx][stride*idy +a_max][stride*idz +b_max] = output[idx][idy][idz]/cpt;
 }
@@ -262,7 +262,7 @@ void backward_max_pooling_cpu(float*** input, float*** output, int input_width,
                     }
                 }
                 if (cpt==0) {
-                    printf_error("Dimensions ou stride ou padding erroné dans 'backward_max_pooling_cpu'\n");
+                    printf_error((char*)"Dimensions ou stride ou padding erroné dans 'backward_max_pooling_cpu'\n");
                 }
                 else {
                     input[i][stride*j +a_max][stride*k +b_max] = output[i][j][k]/cpt;
diff --git a/src/cnn/convolution.c b/src/cnn/convolution.c
index 9ad5450..0589462 100644
--- a/src/cnn/convolution.c
+++ b/src/cnn/convolution.c
@@ -7,9 +7,6 @@
 
 #include "include/config.h"
 
-#ifdef __CUDACC__
-__host__ __device__
-#endif
 
 void make_convolution_cpu(Kernel_cnn* kernel, float*** input, float*** output, int output_width, int stride, int padding) {
     // c'est le kernel de input
diff --git a/src/cnn/convolution.cu b/src/cnn/convolution.cu
index 9ad5450..0589462 100644
--- a/src/cnn/convolution.cu
+++ b/src/cnn/convolution.cu
@@ -7,9 +7,6 @@
 
 #include "include/config.h"
 
-#ifdef __CUDACC__
-__host__ __device__
-#endif
 
 void make_convolution_cpu(Kernel_cnn* kernel, float*** input, float*** output, int output_width, int stride, int padding) {
     // c'est le kernel de input
diff --git a/src/cnn/include/convolution.h b/src/cnn/include/convolution.h
index 0d555ed..6919f5c 100644
--- a/src/cnn/include/convolution.h
+++ b/src/cnn/include/convolution.h
@@ -1,8 +1,5 @@
 #include "struct.h"
 
-#ifdef __CUDACC__
-__host__ __device__
-#endif
 
 /*
 * Effectue la convolution naïvement sur le processeur
diff --git a/src/cnn/include/make.h b/src/cnn/include/make.h
index a115079..3e2a4ac 100644
--- a/src/cnn/include/make.h
+++ b/src/cnn/include/make.h
@@ -3,9 +3,6 @@
 #ifndef DEF_MAKE_H
 #define DEF_MAKE_H
 
-#ifdef __CUDACC__
-__host__ __device__
-#endif
 
 /*
 * Effectue la propagation d'une convolution avec stride et padding choisis sur le processeur
diff --git a/src/cnn/make.c b/src/cnn/make.c
index 3cdc8bd..a2a8dea 100644
--- a/src/cnn/make.c
+++ b/src/cnn/make.c
@@ -10,9 +10,6 @@
 
 #include "include/config.h"
 
-#ifdef __CUDACC__
-__host__ __device__
-#endif
 
 /* 
 * Average Pooling
diff --git a/src/cnn/make.cu b/src/cnn/make.cu
index 3cdc8bd..a2a8dea 100644
--- a/src/cnn/make.cu
+++ b/src/cnn/make.cu
@@ -10,9 +10,6 @@
 
 #include "include/config.h"
 
-#ifdef __CUDACC__
-__host__ __device__
-#endif
 
 /* 
 * Average Pooling
diff --git a/src/common/include/utils.h b/src/common/include/utils.h
index 6758feb..585e6c3 100644
--- a/src/common/include/utils.h
+++ b/src/common/include/utils.h
@@ -39,6 +39,9 @@ int max(int a, int b);
 #endif
 
 
+#ifdef __CUDACC__
+__host__ __device__
+#endif
 /*
 * On renvoie true si et seulement si _ et _:
 * lower_bound <= x < upper_bound
diff --git a/src/common/utils.c b/src/common/utils.c
index 76e612e..da2c7f8 100644
--- a/src/common/utils.c
+++ b/src/common/utils.c
@@ -26,6 +26,10 @@ int max(int a, int b) {
 }
 #endif
 
+
+#ifdef __CUDACC__
+__host__ __device__
+#endif
 int not_outside(int x, int y, int lower_bound, int upper_bound) {
     return !(x < lower_bound || y < lower_bound || x >= upper_bound || y>= upper_bound);
 }
diff --git a/src/common/utils.cu b/src/common/utils.cu
index 03ee100..da2c7f8 100644
--- a/src/common/utils.cu
+++ b/src/common/utils.cu
@@ -27,6 +27,13 @@ int max(int a, int b) {
 #endif
 
 
+#ifdef __CUDACC__
+__host__ __device__
+#endif
+int not_outside(int x, int y, int lower_bound, int upper_bound) {
+    return !(x < lower_bound || y < lower_bound || x >= upper_bound || y>= upper_bound);
+}
+
 int i_div_up(int a, int b) { // Partie entière supérieure de a/b
     return ((a % b) != 0) ? (a / b + 1) : (a / b);
 }