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':''Not to be confused with tom7's [[ABC (compiler)]], [[AlPhAbEt]], nor [[Abc]].'' ABC is an esoteric programming language created by [[User:Orange]]. The language is very simple and easy to implement. This language has nothing to do with the real programming language [https://en.wikipedia.org/wiki/ABC_(programming_language) ABC]. ==Instructions== a - Increment the accumulator b - Decrement the accumulator c - Output the accumulator d - Invert accumulator r - Set accumulator to a random number between 0 and accumulator n - Set accumulator to 0 $ - Toggle ASCII output mode. When on, the c instruction prints the accumulator as an ASCII character. l - Loop back to the beginning of the program. Accumulator and ASCII mode does not reset. ; - Debug. Prints out accumulator as a number and ascii character. Unknown instructions are treated as NOPs. ==Examples== ===Print out 1337=== acaaccaaaac ===Simulate a dice throw=== aaaaarac ===Random phone number generator=== ac naaaaaaaaradc naaaaaaaaarc naaaaaaaaarc naaaaaaaaradc naaaaaaaaarc naaaaaaaaarc naaaaaaaaradc naaaaaaaaarc naaaaaaaaarc naaaaaaaaarc ===[[Hello World]]=== $aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaacaaaaaa aaaaaaaaaaaaaaaaaaaaaaacaaaaaaaccaaacnaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aacbbbbbbbbbbbbcaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaacaaaaaaaa aaaaaaaaaaaaaaaacaaacbbbbbbcbbbbbbbbcnaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaac ===Count infinitely=== acl ===Beep infinitely using ASCII code 7 (bell)=== aaaaaaa$cn$l ==Resources== ===Interpreters=== ====Java==== public class ABC{ public static void interpreter(String code){ int acc=0; boolean stringMode=false; for(int i=0;i<code.length();i++){ switch(code.charAt(i)){ case'a':++acc;break; case'b':--acc;break; case'c':if(stringMode)System.out.print((char)acc); else System.out.print(acc); break; case'd':acc*=-1;break; case'r':acc=(int)Math.floor(Math.random()*(acc+1));break; case'n':acc=0;break; case'$':stringMode=(stringMode==false)?true:false;break; case'l':i=-1;break; case';':System.out.print(acc+" "+(char)acc); } } } } ==== Python ==== import sys import random prog = """ aaaaarac """ acc = 0 pc = 0 ascii_mode = False while True: if prog[pc] == 'a': acc += 1 elif prog[pc] == 'b': acc -= 1 elif prog[pc] == 'c': if ascii_mode: sys.stdout.write(chr(acc)) else: sys.stdout.write(str(acc) + ' ') elif prog[pc] == 'd': acc *= -1 elif prog[pc] == 'r': acc = random.randrange(0, acc) elif prog[pc] == 'n': acc = 0 elif prog[pc] == '$': ascii_mode = not ascii_mode elif prog[pc] == 'l': pc = 0 elif prog[pc] == ';': print(acc, chr(acc)) pc += 1 if pc == len(prog): sys.stdout.write('\n') break ====External Interpreters==== * [http://zzo38computer.org/esoteric/ABC/ABC.php ABC in PHP] {{deadlink}} * [http://www.shorttext.com/li35q5 ABC in Python] {{deadlink}} * [http://www.shorttext.com/9hqeqg ABC in Java] {{deadlink}} * [http://www.shorttext.com/85ozcq ABC in scheme] {{deadlink}} ===Discussions=== * [[Talk:ABC|Talk for ABC]] * [http://dis.4chan.org/read/prog/1217371234 Thread about ABC on 4chans /prog/ text board. Contains many implementations, including the above Algorithmic Language implementation.] {{deadlink}} [[Category:Languages]] [[Category:2008]] [[Category:Implemented]] [[Category:Unusable for programming]]'