Using Numbered Registers

7KH￿*!￿DQG￿￿￿NH\V￿DFFHVV￿WKH￿￿￿￿XVHU￿UHJLVWHUV￿￿7KH￿ *!￿NH\￿LV￿XVHG￿WR￿FRS\￿WKH￿GLVSOD\HG￿QXPEHU￿WR￿D￿ GHVLJQDWHG￿UHJLVWHU￿￿7KH￿￿￿NH\￿LV￿XVHG￿WR￿FRS\￿D￿QXPEHU￿ IURP￿D￿UHJLVWHU￿WR￿WKH￿GLVSOD\￿

7R￿VWRUH￿RU￿UHFDOO￿D￿QXPEHU￿LQ￿WZR￿VWHSV￿￿￿ 3UHVV￿*!￿RU￿￿￿￿￿7R￿FDQFHO￿WKLV￿VWHS￿￿SUHVV￿R￿RU￿%￿￿￿￿(QWHU￿WKH￿UHJLVWHU￿QXPEHU￿￿￿￿WKURXJK￿￿￿￿

,Q￿WKH￿IROORZLQJ￿H[DPSOH￿￿WZR￿VWRUDJH￿UHJLVWHUV￿DUH￿XVHG￿￿&DOFXODWH￿WKH￿

IROORZLQJ￿

475.6

560.1 + 475.6

 

39.15 ￿DQG￿

39.15

 

------------

--------------------------------

 

Keys:

Display:

Description:

￿￿￿￿￿*!￿

475.60

 

6WRUHV￿￿￿￿￿￿￿￿￿GLV￿

 

 

 

SOD\HG￿QXPEHU￿￿LQ￿5￿￿

d￿￿￿￿￿*!￿

39.15

 

6WRUHV￿￿￿￿￿￿￿LQ￿5￿￿

￿

12.15

 

&RPSOHWHV￿ILUVW￿

 

 

 

FDOFXODWLRQ￿

￿￿￿￿￿￿￿￿

475.60

 

5HFDOOV￿5￿￿
d￿￿

39.15

 

5HFDOOV￿5￿￿

￿

26.45

 

&RPSOHWHV￿VHFRQG￿

 

 

 

FDOFXODWLRQ￿

:LWK￿WKH￿H[FHSWLRQ￿RI￿VWDWLVWLFV￿￿\RX￿FDQ￿DOVR￿XVH￿*!￿DQG￿￿￿IRU￿DSSOLFDWLRQ￿UHJLVWHUV￿￿)RU￿H[DPSOH￿￿*!.￿VWRUHV￿WKH￿QXPEHU￿IURP￿WKH￿GLVSOD\￿LQ￿WKH￿.￿UHJLVWHU￿￿￿.￿FRSLHV￿WKH￿FRQWHQWV￿IURP￿.￿WR￿WKH￿GLVSOD\￿

,Q￿PRVW￿FDVHV￿￿LW￿LV￿XQQHFHVVDU\￿WR￿FOHDU￿D￿VWRUDJH￿UHJLVWHU￿VLQFH￿VWRULQJ￿D￿ QXPEHU￿UHSODFHV￿WKH￿SUHYLRXV￿FRQWHQWV￿￿+RZHYHU￿￿\RX￿FDQ￿FOHDU￿D￿VLQJOH￿ UHJLVWHU￿E\￿VWRULQJ￿￿￿LQ￿LW￿￿7R￿FOHDU￿DOO￿WKH￿UHJLVWHUV￿DW￿RQFH￿￿SUHVV￿*&￿￿

40 3: Number Storage and Arithmetic