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- 10 input"datum format ttmmjjjj ";d$
- 20 t=val(mid$(d$,1,2))
- 30 m=val(mid$(d$,3,2))
- 40 j=val(mid$(d$,5))
- 50 gosub 1000
- 60 input"frist in tagen ";r
- 70 jd=jd+r
- 80 gosub 2000
- 90 print "laeuft am";t;".";m;".";j;". ab!"
- 100 end
- 1000 rem kalender -> julianisch
- 1010 if m>2 then m=m-3:goto 1030
- 1020 m=m+9:j=j-1
- 1030 jh=int(j/100):ja=j-100*jh
- 1040 jd=int(146097*jh/4)+int(1461*ja/4)
- 1050 jd=jd+int((153*m+2)/5)+t
- 1060 return
- 2000 rem julianisch -> kalender
- 2005 j=int((4*jd-1)/146097)
- 2010 jd=4*jd-1-146097*j
- 2020 t=int(jd/4)
- 2030 jd=int((4*t+3)/1461)
- 2040 t=4*t+3-1461*jd
- 2050 t=int((t+4)/4)
- 2060 m=int((5*t-3)/153)
- 2070 t=5*t-3-153*m
- 2080 t=int((t+5)/5)
- 2090 j=100*j+jd
- 2100 ifm<10thenm=int(m+3):goto2120
- 2110 m=int(m-9):j=j+1
- 2120 return
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