13 lines
331 B
Plaintext
13 lines
331 B
Plaintext
10 INPUT "Enter a number: ";n
|
|
20 LET t=0
|
|
30 GO SUB 60
|
|
40 PRINT t
|
|
50 STOP
|
|
60 LET nold1=1: LET nold2=0
|
|
70 IF n<0 THEN PRINT "Positive argument required!": RETURN
|
|
80 IF n=0 THEN LET t=nold2: RETURN
|
|
90 IF n=1 THEN LET t=nold1: RETURN
|
|
100 LET t=nold2+nold1
|
|
110 IF n>2 THEN LET n=n-1: LET nold2=nold1: LET nold1=t: GO SUB 100
|
|
120 RETURN
|