Created
June 20, 2012 13:28
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a simple interpreter for BASIC written in AWK | |
see url https://gist.github.com/2959816 | |
########## GWBASIC ############### | |
#!./basic2.sh | |
print "start" | |
s = 0:i = 0 | |
loop: | |
s = s + i:i = i + 1 | |
print "s" , s | |
print "i" , i | |
print "test" & (i<10) | |
if i<=100 goto loop | |
print "end" | |
print s | |
#!./basic2.sh | |
10 print "start" | |
20 s = 0:i = 0 | |
30 s = s + i:i = i + 1 | |
40 print "s" , s | |
50 print "i" , i | |
60 print "test" & (i<10) | |
70 if i<=100 goto 30 | |
80 print "end" | |
90 print s | |
#!./basic2.sh | |
print 0 | |
print 1,2 | |
print 0,"1 2 3 " & 1+2+3 | |
input x | |
print x+1 | |
#!./basic2.sh | |
print "start" | |
s = 0:i = 0 | |
loop: | |
10 s = s + i:i = i + 1 | |
print "s" & s | |
print "i" & i | |
if mod(i,2)=0 then print ">>>" & i:print "!!" | |
print "test" & (i<10) | |
if i<=100 then 10 | |
print "end" | |
print s | |
#!./basic2.sh | |
x=1 | |
gosub display | |
x=x+1 | |
gosub display | |
end | |
display: | |
print ">>>>",x | |
return | |
#!./basic2.sh | |
print "start" | |
x[0]=1:x[1]=2 | |
i=1:s=0 | |
while i<=100 | |
s=s+i | |
i=i+1 | |
while 0<0 | |
end | |
wend | |
#print "!!" | |
#end | |
wend:print s | |
print "end" | |
print x[0]+x[1] | |
#!./basic2.sh | |
print "hello" | |
cls | |
print 0,1, | |
print 2; | |
print 3 | |
print 4 | |
input "num",x | |
print x | |
##### EXTEND ##### | |
#!./basic2.sh | |
print "begin!" | |
@if 0 | |
print "see me!" | |
print "a!" | |
@else | |
print "b!" | |
@endif | |
print "end!" | |
print 0 | |
print "eof" | |
#!./basic2.sh | |
print "begin!" | |
print 0,"true" | |
@if 1 | |
print "a",1 | |
@else | |
print "b",0 | |
@endif | |
print "c",1 | |
@if 0 | |
print 1,"false" | |
@if 1 | |
print 5,"false" | |
@else | |
print 6,"false" | |
@endif | |
@elseif 1 | |
print 2,"true" | |
@if 1 | |
print 3,"true" | |
@else | |
print 4,"false" | |
@endif | |
@endif | |
print 7,"true" | |
print "end!",-1 | |
print 0 | |
print "eof" |
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