1
0
mirror of https://github.com/sehugg/8bitworkshop.git synced 2024-11-26 10:49:17 +00:00
8bitworkshop/presets/basic/sieve.bas

20 lines
416 B
QBasic
Raw Normal View History

OPTION DIALECT MODERN
OPTION CPUSPEED MAX
010 REM***A PRIME NUMBER SIEVE BENCHMARK
020 T = TIMER
022 C = 0
025 N = 8191
030 DIM F(N+1)
040 FOR I = 0 TO N : F(I)=1 : NEXT I
050 S = N
060 FOR I = 0 TO S
070 IF F(I)=0 THEN GOTO 110
080 P = I+I+3
085 IF I+P>S THEN GOTO 110
090 FOR K=I+P TO S STEP P : F(K)=0 : NEXT K
100 C = C+1
110 NEXT I
120 T = TIMER-T
130 PRINT C;" PRIMES FOUND IN ";T;" SECONDS"
150 END