HP 33s scientific calculator 用户手册

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页码 388
 
 Programming 
Techniques 
13–5
 
File name 33s-English-Manual-040130-Publication(Edition 2).doc       Page : 388 
Printed Date : 2004/1/30                       Size : 13.7 x 21.2 cm 
A Programmed GTO Instruction 
The GTO label  instruction (press 
¹
 
r
  label) transfers the execution of a 
running program to the program line containing that label, wherever it may be. 
The program continues running from the new location, and never automatically 
returns to its point of origination, so GTO is not used for subroutines. 
For example, consider the "Curve Fitting" program in chapter 16. The    
instruction branches execution from any one of three independent initializing 
routines to LBL Z, the routine that is the common entry point into the heart of the 
program: 

   
 
Can start here. 
 
 
  
 
1
 
Branches to Z. 
 
 
 
  
 
 
Can start here. 
 
 
  
 
1
 
Branches to Z. 
 
 
 
  
 
 
Can start here. 
 
 
  
 
1
 
Branches to Z. 
 
 
 
  
 
1
 
Branch to here. 
 
 
Using GTO from the Keyboard 
You can use 
¹
 
r
 to move the program pointer to a specified label or line 
number without starting program execution.