RosettaCodeData/Task/Bioinformatics-Sequence-mut.../PureBasic/bioinformatics-sequence-mut...

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#BASE$="ACGT"
#SEQLEN=200
#PROTOCOL=#True
Global dna.s
Define i.i
Procedure pprint()
Define p.i, cnt.i, sum.i
For p=1 To Len(dna) Step 50
Print(RSet(Str(p-1)+": ",5))
PrintN(Mid(dna,p,50))
Next
PrintN("Base counts:")
For p=1 To 4
cnt=CountString(dna,Mid(#BASE$,p,1)) : sum+cnt
Print(Mid(#BASE$,p,1)+": "+Str(cnt)+", ")
Next
PrintN("Total: "+Str(sum))
EndProcedure
Procedure InsertAtPos(basenr.i,position.i)
If #PROTOCOL : PrintN("Insert base "+Mid(#BASE$,basenr,1)+" at position "+Str(position)) : EndIf
dna=InsertString(dna,Mid(#BASE$,basenr,1),position)
EndProcedure
Procedure EraseAtPos(position.i)
If #PROTOCOL : PrintN("Erase base "+Mid(dna,position,1)+" at position "+Str(position)) : EndIf
If position>0 And position<=Len(dna)
dna=Left(dna,position-1)+Right(dna,Len(dna)-position)
EndIf
EndProcedure
Procedure OverwriteAtPos(basenr.i,position.i)
If #PROTOCOL : PrintN("Change base at position "+Str(position)+" from "+Mid(dna,position,1)+" to "+Mid(#BASE$,basenr,1)) : EndIf
If position>0 And position<=Len(dna)
position-1
PokeS(@dna+2*position,Mid(#BASE$,basenr,1),-1,#PB_String_NoZero)
EndIf
EndProcedure
If OpenConsole()=0 : End 1 : EndIf
For i=1 To #SEQLEN : dna+Mid(#BASE$,Random(4,1),1) : Next
PrintN("Initial sequence:")
pprint()
For i=1 To 10
Select Random(2)
Case 0 : InsertAtPos(Random(4,1),Random(Len(dna),1))
Case 1 : EraseAtPos(Random(Len(dna),1))
Case 2 : OverwriteAtPos(Random(4,1),Random(Len(dna),1))
EndSelect
Next
PrintN("After 10 mutations:")
pprint()
Input()