diff --git a/AnimalProcessing/Proficiencies/project.c b/AnimalProcessing/Proficiencies/project.c
index 0404ff7..b029511 100644
--- a/AnimalProcessing/Proficiencies/project.c
+++ b/AnimalProcessing/Proficiencies/project.c
@@ -67,11 +67,11 @@ int exec_cmd(char** args){
     // Child
     else if (pid == 0){
 
-        if(strcmp(*args , "run") != 0) exit(-1);
-        else exit(execvp("run", args));
-        char child_buffer[2048];
-        fgets(child_buffer, 2047, stdout);
-        printf("%s\n", child_buffer);
+        if(strcmp(args[0] , "run") != 0) exit(-1);
+        
+        if(execvp(args[1], args + 1) != 0) exit(-1);
+        exit(0);
+    
         //if(execvp(args[0], args) == -1) exit(-1);
         //exit(0);
     }
@@ -84,8 +84,10 @@ int exec_cmd(char** args){
 
         if(waitpid(pid, &wstatus, 0) ==  -1) return -1; 
         
-        if( WIFEXITED(wstatus)) return WEXITSTATUS(wstatus);
-    }
+        if( WIFEXITED(wstatus)){
+            if(WEXITSTATUS(wstatus) == 255) return 1;
+            else return WEXITSTATUS(wstatus);
+    }}
     return 0;
 }
 
@@ -102,7 +104,7 @@ int execution_loop(){
     char **args;
     while (1){ //boucle inf
     
-        puts("> "); //invitation à entrer une coooooooommmmmaaaaaaaannnnndde
+        fputs("> ", stdout); //invitation à entrer une coooooooommmmmaaaaaaaannnnndde
         
         // on recupere le texte tapé grace a stdin
         fgets(buffer, 2047, stdin);
@@ -116,28 +118,31 @@ int execution_loop(){
         int index = 0;
         while(args[index] != NULL) index ++;
         
-        printf("nbr args : %i\n", index);
+       // printf("nbr args : %i\n", index);
 
         if (index > 0){ // si l'user rentre juste un ' ' ou rien
 
             if (strcmp(args[0], "exit") == 0 ){
                  
-                if (!args[1]) free(args);
-
-                else{ 
-                    last_code = atoi(args[1]);
-                    free(args);
-                }
+                if (args[1]) last_code = atoi(args[1]);
                 
+                else last_code = 0;
+                    
+                free(args);
                 return last_code;        
             }
             
+            //execution du run <commande> via le child 
             else if (strcmp(args[0], "run") == 0){
-                printf("test\n");
+                //printf("test\n");
                 last_code = exec_cmd(args);
             }
             
-            else if (strcmp(args[0], "?") == 0) printf("%i\n", last_code);
+            //interrogation du last_code 
+            else if (strcmp(args[0], "?") == 0){
+                
+                printf("%i\n", last_code);
+            }
             
             else {
                     printf("Unknown command\n");