Brainfuck

++++++++++[>+++++++>++++++++++>+++><<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.

#include <fstream>
#include <iostream>
#include <vector>

using namespace std;
static char cpu[30000];

int main(int argc, char **argv) {
  vector<char> acc;
  char ch;
  ifstream infile(argv[1]);
  while (infile) {
    infile.get(ch);
    acc.push_back(ch);
  }
  infile.close();
  unsigned int j = 0;
  int brc = 0;
  for (int i = 0; i < acc.size(); ++i) {
    if (acc[i] == '>') j++;
    if (acc[i] == '<') j--;
    if (acc[i] == '+') cpu[j]++;
    if (acc[i] == '-') cpu[j]--;
    if (acc[i] == '.') cout << cpu[j];
    if (acc[i] == ',') cin >> cpu[j];
    if (acc[i] == '[') {
      if (!cpu[j]) {
        ++brc;
        while (brc) {
          ++i;
          if (acc[i] == '[')
            ++brc;
          if (acc[i] == ']')
            --brc;
        }
      } else continue;
    } else if (acc[i] == ']') {
      if (!cpu[j]) continue;
      else {
        if (acc[i] == ']') brc++;
        while (brc) {
          --i;
          if (acc[i] == '[') brc--;
          if (acc[i] == ']') brc++;
        }
        --i;
      }
    }
  }
}

def block(code):
    opened = []
    blocks = {}
    for i in range(len(code)):
        if code[i] == '[':
            opened.append(i)
        elif code[i] == ']':
            blocks[i] = opened[-1]
            blocks[opened.pop()] = i
    return blocks

def parse(code):
    return ''.join(c for c in code if c in '><+-.,[]')

def run(code):
    code = parse(code)
    x = i = 0
    bf = {0: 0}
    blocks = block(code)
    l = len(code)
    while i < l:
        sym = code[i]
        if sym == '>':
            x += 1
            bf.setdefault(x, 0)
        elif sym == '<':
            x -= 1
        elif sym == '+':
            bf[x] += 1
        elif sym == '-':
            bf[x] -= 1
        elif sym == '.':
            print(chr(bf[x]), end='')
        elif sym == ',':
            bf[x] = int(input('Input: '))
        elif sym == '[':
            if not bf[x]: i = blocks[i]
        elif sym == ']':
            if bf[x]: i = blocks[i]
        i += 1

code = input()
run(code)

#include <stdio.h>
#define RAM 8
unsigned char cell[RAM];
char ptr = 0;

void main(int argc, char *argv[]) {
  FILE *prg;
  if ((prg = fopen(argv[1], "rb")) == NULL)
    return;
  // INIT
  char com;
  while ((com = (char)getc(prg)) != EOF) {
    switch (com) {
    case '>':
      ptr++;
      if (ptr >= RAM)
        ptr--;
      break;

    case '<':
      ptr--;
      if (ptr < 0)
        ptr++;
      break;

    case '+':
      cell[ptr]++;
      break;

    case '-':
      cell[ptr]--;
      break;

    case '.':
      putc(cell[ptr], stdout);
      break;

    case ',':
      scanf("%d", &cell[ptr]);
      break;

    case '[':
      if (cell[ptr] == (char)0) {
        while (getc(prg) != ']') {
        }
      }
      break;

    case ']':
      if (cell[ptr] != (char)0) {
        do {
          fseek(prg, -2, SEEK_CUR);
        } while ((com = getc(prg)) != '[');
      } // IF
      break;
    } // SWITCH
  }   // WHILE
  fclose(prg);
}