add

cv5/a_train.c

@@ -6,10 +6,12 @@
 #include "a_train.h"
 
 struct car* add_car(struct car* first,const char* target) {
+    struct car* newcar = calloc(1, sizeof(struct car));
+
     if(target == NULL){
         return 0;
     }
-    struct car* newcar = calloc(1, sizeof(struct car));
+    
     if(first == NULL){
         return newcar;
     }