illegal use of this type as an expression解决方法

illegal use of this type as an expression
我定义了一个结构体
typedef struct
{

int x;
int y;
U16 itemImageId;
U16 checkId;
U16 checkedId;
int index;
char str[50];
}MY_MenuDC;
然后使用他
MY_MenuDC *MenuDC = (MY_MenuDC*)malloc(sizeof(MY_MenuDC));

结果编译报错
E:\prj_mt6235\plutommi\mmi\myapp\myappsrc\myappsrc.c(140) : error C2275: 'MY_MenuDC' : illegal use of this type as an expression
  E:\prj_mt6235\plutommi\mmi\myapp\myappsrc\myappsrc.c(113) : see declaration of 'MY_MenuDC'
E:\prj_mt6235\plutommi\mmi\myapp\myappsrc\myappsrc.c(140) : error C2065: 'MenuDC' : undeclared identifier

[解决办法]

C/C++ code

#include<stdio.h>#include <stdlib.h>#define U16 unsigned short void main(){    typedef struct    {        int x;        int y;        U16 itemImageId;        U16 checkId;        U16 checkedId;        int index;        char str[50];    }MY_MenuDC;    //然后使用他    MY_MenuDC *MenuDC = (MY_MenuDC*)malloc(sizeof(MY_MenuDC));}