+++++ +++++ initialize counter (cell #0) to 10
[ use loop to set the next four cells to 70/100/30/10
> +++++ ++ add 7 to cell #1
> +++++ +++++ add 10 to cell #2
> +++ add 3 to cell #3
> + add 1 to cell #4
<<<< - decrement counter (cell #0)
]
> ++ . print 'H'
> + . print 'e'
+++++ ++ . print 'l'
. print 'l'
+++ . print 'o'
> ++ . print ' '
<< +++++ +++++ +++++ . print 'W'
> . print 'o'
+++ . print 'r'
----- - . print 'l'
----- --- . print 'd'
> + . print '!'
> . print '\n'

char space[30000];

int main() {
    char *ptr = space;
    *ptr = 'a';
}

void run_code(char *code_start, char *code_end) {
    char *space = (char *)calloc(max_size, sizeof(char));
    char *ptr = space;
    char *code = code_start;
    while (code < code_end) {
        switch (*code) {
            case '>':
                ptr++;
                break;

            case '<':
                ptr--;
                break;

            case '+':
                (*ptr)++;
                break;

            case '-':
                (*ptr)--;
                break;

            case '.':
                putchar(*ptr);
                break;
  
            case ',':
                *ptr = getchar();
                break;

            case '[':
                if (!(*ptr)) {
                    int lbraces = 0;
                    while ((*code) != ']' || lbraces != 1) {
                        if ((*code) == '[') lbraces++;
                        if ((*code) == ']') lbraces--;
                        code++;
                    }
                }
                break;

            case ']':
                if (*ptr) {
                    int rbraces = 0;
                    while ((*code) != '[' || rbraces != 1) {
                        if ((*code) == ']') rbraces++;
                        if ((*code) == '[') rbraces--;
                        code--;
                    }
                }
                break;
        }
        code++;
    }
    free(space);
    space = ptr = NULL;
    return;
}