# Brain Fuck # Inspired by Flandre Scarlet # https://www.sololearn.com/Profile/5220309/ # and this amazing live implementation of Brain Fuck # https://code.sololearn.com/W5I2P1Y5aGfd/ import re class BrainFuck(object): def __init__(self, instr): self.str = instr self.pos = 0 self.loops = [] self.stack = [0] self.idx = 0 if re.search("[^\+\-\>\<\[\]\.\,]", instr): print("Wrong input,", end=" ") print("allowed set ot chars:", end=" ") print("+-><[].,") else: self.run() def run(self): while self.pos < len(self.str): {'+': self.add, '-': self.substract, '>': self.stack_up, '<': self.stack_down, '[': self.loop, ']': self.end_loop, '.': self.write, ',': self.read}[self.str[self.pos]]() self.pos += 1 print() def add(self): self.stack[self.idx] += 1 def substract(self): self.stack[self.idx] -= 1 def stack_up(self): self.idx += 1 if self.idx == len(self.stack): self.stack.append(0) def stack_down(self): self.idx -= 1 if self.idx else 0 def loop(self): self.loops.append(self.pos) def end_loop(self): pos = self.loops.pop() if self.stack[self.idx]: self.pos = pos self.loop() def write(self): print(chr(self.stack[self.idx]), end="") def read(self): self.stack[self.idx] = ord(input()[0]) if __name__ == "__main__": bf = BrainFuck("++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>") print(bf.stack)

brain_fuck.py