correction code

AnimalProcessing/Fundamentals/exec.c

@@ -42,4 +42,5 @@ printf("%d\n", r1);
 
     int r2 = execute_me("wrong", argv);
     printf("%d\n", r2);
-}*/
+}
+*/

AnimalProcessing/Fundamentals/pipe.c

@@ -44,7 +44,7 @@ void piped(){
         char buffer[2048];
         read(fd[0], buffer, sizeof(buffer));
         
-        printf("My child sends me : %s\n", buffer);
+        printf("My child sends me : %s", buffer);
         close(fd[0]); 
         wait(NULL);
 

AnimalProcessing/Fundamentals/wait.c

@@ -14,7 +14,7 @@ int fibo (int n){
 }
 int wait_child(int x){
 
-    if(x < 0) return -1;
+    if(x < 0) return 1;
 
     int wstatus;
     pid_t pid = fork();