The inputtrap...goto statement, using the str.exp, sets up an automatic computed goto based on the next input @ statement’s data. The position of each character in the string expression corresponds to the position of the statement label in the list. This acts as a trap that causes a goto on all subsequent input @ statements and branches to a label in the current program.
inputtrap str.exp goto statement.label{,statement.label{,...}}
| str.exp | An expression evaluating to characters to be searched for in the input. |
| statement.label | statement label to be branched to. |
inputtrap must precede its associated input @ statement. Only one inputtrap statement can be active at any time.
If data is entered that does not correspond to the inputtrap str.exp, then no trap occurs and execution continues with the statement after the input @.
inputtrap "abcd" goto 10,20,30,40 input @(5,5):x stop 10 print "You entered a" stop 20 print "You entered b" stop 30 print "You entered c" stop 40 print "You entered d" stop