[ARX]这段代码为什么老出错？

suker23

 ads_name entname;
 ads_point ptt;
 AcDbObjectId entId;
 AcDb2dPolyline*  pent;
 acedEntSel("\n选择多段线",entname,ptt);
 acdbOpenObject(pent,entId,AcDb::kForRead);//在这里出错
 AcDbObjectIterator* pvertexiter=pent->vertexIterator();//
 pent->close();
 AcDb2dVertex *pvertex;
 AcGePoint3d location;
 AcDbObjectId vertexId;

 for(int i=0;!pvertexiter->done();i++,pvertexiter->step())
 {
  vertexId=pvertexiter->objectId();
  acdbOpenObject(pvertex,vertexId,AcDb::kForRead);
  location=pvertex->position();
  pvertex->close();
  acutPrintf("\n 坐标 x=%0.3f,y=%0.3f,z=%0.3f",location[X],location[Y],location[Z]);
 }
 delete  pvertexiter;
 该怎么调试？

houdy

Acad::ErrorStatus dbStatus = acdbOpenObject(pent,entId,AcDb::kForRead);

在Debug模式下，根据dbStatus的值判断出可能的错误。

kkr824

试试

Acad::ErrorStatus es = acdbOpenAcDbEntity((AcDbEntity *&)pent,entId,AcDb::kForRead);

HuaiYu

这是那个书上的例子吧，我也遇到了这个问题，也正烦着呢

 

arbyao

好像没给entId赋值啊

 

easypower

AcDb2dPolyline*  pent;
改成

AcDbPolyline* pent;