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Add two values
from https://en.wikipedia.org/wiki/Brainfuck#Adding_two_values
ALL ABOARD
chug chug
END OF THE LINE
Cell c0 = 2
ALL ABOARD
choo
END OF THE LINE
ALL ABOARD
chug chug chug chug chug
END OF THE LINE
Cell c1 = 5
ALL ABOARD
tickets please
END OF THE LINE
Start your loops with your cell pointer on the loop counter (c1 in our case)
ALL ABOARD
choo choo
END OF THE LINE
ALL ABOARD
chug
END OF THE LINE
Add 1 to c0
ALL ABOARD
choo
END OF THE LINE
ALL ABOARD
chugga
END OF THE LINE
Subtract 1 from c1
ALL ABOARD
your ticket please
END OF THE LINE
End your loops with the cell pointer on the loop counter
At this point our program has added 5 to 2 leaving 7 in c0 and 0 in c1
but we cannot output this value to the terminal since it is not ASCII encoded
To display the ASCII character "7" we must add 48 to the value 7
We use a loop to compute 48 = 6 * 8
ALL ABOARD
chug chug chug chug
END OF THE LINE
ALL ABOARD
chug chug chug chug
END OF THE LINE
c1 = 8 and this will be our loop counter again
ALL ABOARD
tickets please
choo choo
END OF THE LINE
ALL ABOARD
chug chug chug
END OF THE LINE
ALL ABOARD
chug chug chug
END OF THE LINE
Add 6 to c0
ALL ABOARD
choo
END OF THE LINE
ALL ABOARD
chugga
END OF THE LINE
Subtract 1 from c1
ALL ABOARD
your ticket please
choo choo
END OF THE LINE
ALL ABOARD
click
END OF THE LINE
Print out c0 which has the value 55 which translates to "7"!
Finally print a newline:
ALL ABOARD
chugga chugga chugga chugga chugga chugga chugga chugga chugga chugga chugga
chugga chugga chugga chugga chugga chugga chugga chugga chugga chugga chugga
chugga chugga chugga chugga chugga chugga chugga chugga chugga chugga chugga
chugga chugga chugga chugga chugga chugga chugga chugga chugga chugga chugga
chugga click
END OF THE LINE
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