Help Me in this code! Why is it not working?

Question

I have tried to make a simple brainf*** interpreter to take code and output its result... But it is not working and giving any output... Please Help!

Answer 1

0) Where did you get this code
1) Where did you try to run it on
2) What errors did you get

Answer 2

@Hatsy
0) Made it myself
1) Ran it on CppDroid
2) No Errors, but no output on input:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++.
//Should Print 'A'
Or this:
++++++++[>+++++++++<-]>+.<++++++[>------<-]>-----.<++++++[>+++++++<-]>++.<+++++[>+++++++<-]>.+++++++.-----------------.<++++++++[>--------<-]>-----.<+++++++[>++++++++<-]>+.<++++[>+++++<-]>++.++++++.

Answer 3

@Hatsy Rei
On running this in Code Playground, the compiler gives me a Compilation Error, which I am unable to find...

Answer 4

@Babak Sheykhan (PERS)
Yes...

Answer 5

@Ace
Can you please name one, sir?
The truth is that I have never used an online debugger... 😅

Answer 6

@Ace
But what you meant was an automatic one, right sir?
Or you wanted me myself to find the errors - that I tried but couldn't find any...(Perhaps I don't have that much knowledge)...

Answer 7

@Ace
Thank You, Sir!

Answer 8

#include <iostream>
using namespace std;
class Brainfuck {
  public:
    char data[30000];
    char *d;
    const char *p;
    Brainfuck(const char prog[]) {
      d = data;
      p = prog;
    }
    void pincr() {
      d++;
    }
    void pdecr() {
      d--;
    }
    void vincr() {
      (*d)++;
    }

    void vdecr() {
      (*d)--;
    }
    void puts() {
      cout << *d;
    }
    void gets() {
      cin >> *d;
    }
    void bropen() {
      int bal = 1;
      if (*d == '\0') {
        do {
          p++;
          if (*p == '[') bal++;
          else if (*p == ']') bal--;
        } while ( bal != 0 );
      }
    }
    void brclose() {
      int bal = 0;
      do {
        if (*p == '[') bal++;
        else if (*p == ']') bal--;
     p--;
      } while ( bal != 0 );
    }
    void evaluate() {
      while (*p) {
        switch (*p) {
          case '>':
            pincr();
            break;
          case '<':
            pdecr();
            break;
          case '+':
            vincr();
            break;
          case '-':
            vdecr();
            break;
          case '.':
            puts();
            break;
          case ',':
            gets();
            break;
          case '[':
            bropen();
            break;
          case ']':
            brclose();
            break;
        }
        p++;
      }
    }
;

int main(void) {
  char* buffer;
buffer= new char [10000];
cin>>buffer;
  Brainfuck interpreter(buffer);
  interpreter.evaluate();
}

Answer 9

Did you trace your code?