Update cv4/a_train.c

cv4/a_train.c

@@ -1,11 +1,12 @@
 #include <stdio.h>
 #include"a_train.h"
 
-/////@
+
 
 
 struct car* add_car(struct car* first,const char* target)
 {
+    struct car* ret = first;
     struct car* nc=(struct car*) malloc(sizeof(struct car));
     strcpy(nc->value, target);
     nc->next=NULL;
@@ -17,7 +18,7 @@ struct car* add_car(struct car* first,const char* target)
             first=first->next;
         }
         first->next=nc;
-        return first;
+        return ret;
     }
     
     first=nc;