STL MAP自定义主键

struct KeyWord{int iImgID; //图像IDint iDatabaseID; //所属类别ID//需要重载结构的小于符号bool operator < ( const KeyWord rhs) const {return iImgID < rhs.iImgID || iImgID == rhs.iImgID && iDatabaseID < rhs.iDatabaseID;}};map< KeyWord, ShapeInfo > G_mShapeUpdate;G_mShapeUpdate.insert( pair<KeyWord, ShapeInfo>( keyword, shapeinfo ) );。。。。。。itShape = G_mShapeUpdate.find( keyword ); //当找到了的时候 if ( itShape != G_mShapeUpdate.end( ) ) { shapeinfo = (*itShape).second; return 0; }