BrainFuck

using System;using System.Runtime.InteropServices;
namespace BrainFrack{
    class Program{
        static unsafe void Main(string[]args){
            string c=Console.ReadLine();
            int s=30000;
            byte* p=(byte*)Marshal.AllocCoTaskMem(s);
            for(int i=0;i<s;i++)*p++=0;
            p-=s;
            Console.Clear();
            b(c,ref p);
            Console.ReadLine();
        }
        static unsafe void b(string c,ref byte*p){
            for (int i=0;i<c.Length;i++)
                switch (c[i]){
                    case'>':p++;break;
                    case'<':p--;break;
                    case'+':(*p)++;break;
                    case'-':(*p)--;break;
                    case'.':Console.Write((char)*p);break;
                    case',':*p = (byte)Console.ReadKey(true).KeyChar;break;
                    case'[':b(c.Substring(i+1),ref p);while(c[++i]!=']');break;
                    case']':if(*p==0)return;i=-1;break;
                }
        }
    }
}