makefile 多路径下编译失败解决方案

makefile 多路径下编译失败
错误提示：
make: *** No rule to make target `user.c', needed by `user.o'. Stop.
请问如何才能实现多目录的编译？？请指教一下，谢谢！！！
文件结构
E:.
│ makefile
│ makefile.bak
│ 新建 Microsoft Word 文档.doc
│
├─include
│ user.h
│ user.h.bak
│
└─src
  app.c
  app.c.bak
  user.c
  user.c.bak
makefile脚本

Python code

CC = g++OBJ = user.o app.o#vpath %.h /include#vpath %.c /srcVPATH=/src:/includeapp:$(OBJ)    $(CC) -o app $(OBJ)user.o:user.c    $(CC) -c user.capp.o:app.c  user.h    $(CC) -c app.cclean:    rm *.o app

C/C++ code

//user.h#include <stdio.h>void PrintHello();

C/C++ code

//user.c#include "user.h"void PrintHello(){    printf("hello ,it is my makefile test\n");}

C/C++ code

//app.c#include "user.h"int main(){  PrintHello();    }