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July 3, 2017 04:25
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def setup(): | |
index = 0 | |
vals = [] | |
for i in range(256): | |
vals.append(0) | |
program = raw_input('enter your brainfuck program: ') | |
parens = match_parens(program) | |
interpret(vals,index,parens,program) | |
def interpret(vals,index,parens,program): | |
i = 0 | |
ivparens = {v: k for k, v in parens.items()} | |
while i < len(program): | |
if program[i] == '>': | |
index=index+1 | |
elif program[i] == '<': | |
index=index-1 | |
elif program[i] == '+': | |
vals[index]=vals[index]+1 | |
elif program[i] == '-': | |
vals[index]=vals[index]-1 | |
elif program[i] == '[': | |
if vals[index] == 0: | |
i = parens[i] | |
elif program[i] == ']': | |
if vals[index] != 0: | |
i = ivparens[i] | |
elif program[i] == '.': | |
print chr(vals[index]) | |
elif program[i] == ',': | |
vals[index] = ord(raw_input()[0]) | |
i=i+1 | |
def match_parens(program): | |
stack = [] | |
parens = {} | |
for i in range(len(program)): | |
if program[i] == '[': | |
stack.append(i) | |
if program[i] == ']': | |
parens.update({stack.pop(): i}) | |
return parens | |
setup() |
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