相关疑难解决方法(0)

我正在尝试将char*字段分配给char*字段,但是会收到此错误:

incompatible types when assigning to type 'char[128]' from type 'char *'

我怎样才能解决这个问题？为什么会这样？

    AddressItem_Callback_ContextType *context = (AddressItem_Callback_ContextType *)malloc(sizeof(AddressItem_Callback_ContextType));

   //check if icons need to be downloaded
   if (pEntity->cBigIcon[0] != 0){
      if (res_get(RES_BITMAP,RES_SKIN, pEntity->cBigIcon) == NULL){

          context->Icon = pEntity->cBigIcon;
          context->iID = pEntity->iID;

         res_download(RES_DOWNLOAD_IMAGE, pEntity->cBigIcon, NULL, "",TRUE, 1, addressItem_icon_download_callback, context );
      }
   }

声明:

typedef struct
{
    int  iID;        //  POI Type ID
    int  iExternalPoiServiceID; // Service ID
    int  iExternalPoiProviderID; // Provider ID
    char cBigIcon[MAX_ICON_LENGHT];
    char cSmallIcon[MAX_ICON_LENGHT];
    char cBigPromotionIcon[MAX_ICON_LENGHT];
    char cSmallPromotionIcon[MAX_ICON_LENGHT];
    char cOnClickUrl[MAX_URL_LENGTH]; …

我的结构如下:

typedef struct {
      unsigned long attr;
      char fileName[128];
} entity;

然后我尝试分配一些值,但得到一条错误信息......

int attribute = 100;
char* fileNameDir = "blabla....etc";

entity* aEntity;

aEntity->attr = attributes;
aEntity->fileName = fileNameDir;

编译告诉我:

错误:#137:表达式必须是可修改的左值aEntity-> fileName = fileNameDir;

为什么我不能在这里将这个角色分配给结构中的那个角色？

谢谢