Code compiler (and executor). This command will compile and execute user-provided code in a number of languages, and then display the compiler and/or program output.
The program is executed within a gdb debugger instance, which may be interacted with via the [gdb macros described below](#using-the-gdb-debugger) or with the `gdb("command")` function.
The compiler and program are executed inside a virtual machine. After each run, the virtual machine is restored to a previous state. No system calls have been disallowed. You can write to and read from the filesystem, provided you do it in the same program. The network cable has been unplugged. You are free to write and test any code you like. Have fun.
-`[nick] { <same as above without the cc in front> }`
You can pass any gcc compiler options. By default, `-Wall -Wextra -std=c11 -pedantic` are passed unless an option is specified.
The `-paste` option will pretty-format and paste the code/output to a paste site and display the URL (useful to preserve newlines in output, and to refer to line-numbers).
The `-nomain` flag will prevent the code from being wrapped with a `main()` function. This is not necessary if you're explicitly defining a `main` function; it's only necessary if you don't want a `main` function at all.
The `-noheaders` flag will prevent any of the default headers from being added to the code. This is not necessary if you explicitly include any headers since doing so will override the default headers. This flag is only necessary if you want absolutely no headers whatsoever.
<PBot> pragma-: Program received signal 11 (SIGSEGV) in bang () at statement: strcpy(p, s); <localvariables:p =0x0,s ="lol">
<!---->
<pragma-> cc int a = 2 / 0;
<PBot> pragma-: [In function 'main': warning: division by zero] Program received signal 8 (SIGFPE) at statement: int a = 2 / 0;
#### C and C++ Functionality
#### Using the preprocessor
##### Default #includes
These are the default includes for C11. To get the most up-to-date list of #includes, use the `cc paste` command.
#define _XOPEN_SOURCE 9001
#define __USE_XOPEN
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<unistd.h>
#include<math.h>
#include<limits.h>
#include<sys/types.h>
#include<stdint.h>
#include<stdbool.h>
#include<stddef.h>
#include<stdarg.h>
#include<stdnoreturn.h>
#include<stdalign.h>
#include<ctype.h>
#include<inttypes.h>
#include<float.h>
#include<errno.h>
#include<time.h>
#include<assert.h>
#include<complex.h>
##### Using #include
In C and C++, you may `#include <file.h>` one after another on the same line. The bot will automatically put them on separate lines. If you do use `#include`, the files you specify will replace the default includes. You do not need to append a `\n` after the `#include`.
<pragma-> cc #include<sys/utsname.h> struct utsname u; uname(&u);
<PBot> pragma-: <nooutput:u ={sysname="Linux",nodename ="compiler",release ="3.2.0-8-generic",version ="#15-Ubuntu SMP Wed Jan 11 13:57:44 UTC 2012",machine ="x86_64",__domainname ="(none)"}>
<!---->
<pragma-> cc #include<stdio.h>#include<stdlib.h> void func(void) { puts("Hello, world"); } func();
<PBot> pragma-: Hello, World
In the previous examples, only the specified includes (e.g., `<sys/utsname.h>` in the first example, `<stdio.h>` and `<stdlib.h>` in the second, will be included instead of the default includes.
##### Using #define
You can also `#define` macros; however, `#defines` require an explicit `\n` sequence to terminate, oe the remainder of the line will be part of the macro.
<pragma-> cc #define GREETING "Hello, World"\n puts(GREETING);
<PBot> pragma-: Hello, World
#### main() Function Unnecessary
In C and C++, if there is no `main` function, then a `main` function will created and wrapped around the appropriate bits of your code (unless the `-nomain` flag was specified); anything outside of any functions, excluding preprocessor stuff, will be put into this new `main` function.
<pragma-> cc -paste int add(int a, int b) { return a + b; } printf("4 + 6 = %d -- ", add(4, 6)); int add3(int a, int b, int c)
<PBot> pragma-: Stack level 1, frame at 0x7fffffffe660: rip = 0x400e28 in foo (); saved rip 0x400e43 called by frame at 0x7fffffffe680, caller of frame at 0x7fffffffe650 source language c. Arglist at 0x7fffffffe650, args: Locals at 0x7fffffffe650, Previous frame's sp is 0x7fffffffe660 Saved registers: rbp at 0x7fffffffe650, rip at 0x7fffffffe658
#### Interactive Editing
The [cc](#cc) command supports interactive-editing. The general syntax is: `cc [command]`.
Each cc snippet is saved in a buffer which is named after the channel or nick it was used in. You can use [show](#show) or [diff](#diff) with a buffer argument to view that buffer; otherwise you can use the [copy](#copy) command to copy the most recent snippet of another buffer into the current buffer and optionally chain it with another command -- for example, to copy the `##c` buffer (e.g., from a private message or a different channel) and paste it: `cc copy ##c and paste`.
The commands are: [copy](#copy), [show](#show), [diff](#diff), [paste](#paste), [run](#run), [undo](#undo), [s//](#s), [replace](#replace), [prepend](#prepend), [append](#append), and [remove](#remove). Most of the commands may be chained together by separating them with whitespace or "and".
To copy the most recent snippet from another buffer (e.g., to copy another channel's or private message's buffer to your own private message or channel), use the `copy` command. Other commands can optionally be chained after this command.
Usage: `cc copy <buffer> [and ...]`
##### show
To show the latest code in the buffer, use the `show` command. This command can take an optional buffer argument.
<pragma-> cc show
<PBot> pragma-: printf("Hello, world!");
This command is stand-alone and cannot be chained with other interactive-editing commands.
##### diff
To see the differences between the two most recent snippets, use the `diff` command. This command can take an optional buffer argument.
<PBot> Let Batman be another name for a character. Let Bruce_Wayne be a character. Let superhero be a character, with value being Bruce_Wayne cast to a Batman.
### expand
Expands macros in C code and displays the resulting code. Macros must be terminated by a `\n` sequence. You may `#include` headers to expand macros defined within.
Usage: `expand <C snippet>`
<pragma-> expand #define WHILE while ( \n #define DO ) { \n #define WEND } \n int i = 5; WHILE --i DO puts("hi"); WEND
<PBot> pragma-: int i = 5; while ( --i ) { puts("hi"); }
<pragma-> expand #include<stdlib.h> NULL
<PBot> pragma-: ((void *)0)
### prec
### paren
Shows operator precedence in C99 expressions by adding parentheses.
Usage: `prec <expression>``paren <expression>`
<pragma-> prec *a++
<PBot> pragma-: *(a++)
<!---->
<pragma-> prec a = b & c
<PBot> pragma-: a = (b & c)
<!---->
<pragma-> prec token = strtok(s, d) != NULL
<PBot> pragma-: token = (strtok(s, d) != NULL)
### faq
Displays questions from the [http://http://www.eskimo.com/~scs/C-faq/top.html](comp.lang.c FAQ). Some queries may return more than one result; if this happens, you may use the `match #` optional argument to specify the match you'd like to view.
Usage: `faq [match #] <search regex>`
<pragma-> faq cast malloc
<PBot> 2 results, displaying #1: 7. Memory Allocation, 7.6 Why am I getting ``warning: assignment of pointer from integer lacks a cast** for calls to malloc? : http://www.eskimo.com/~scs/C-faq/q7.6.html
<pragma-> faq 2 cast malloc
<PBot> 2 results, displaying #2: 7. Memory Allocation, 7.7 Why does some code carefully cast the values returned by malloc to the pointer type being allocated? : http://www.eskimo.com/~scs/C-faq/q7.7.html
<pragma-> faq ^6.4
<PBot> 6. Arrays and Pointers, 6.4 Why are array and pointer declarations interchangeable as function formal parameters? : http://www.eskimo.com/~scs/C-faq/q6.4.html
### cfact
Displays a random C fact. You may specify a search text to limit the random set to those containing that text.
`Usage: cfact [search text]`
<pragma-> cfact
<PBot> pragma-: [6.7.2.1 Structure and union specifiers] A structure or union may have a member declared to consist of a specified number of bits. Such a member is called a bit-field.
### cjeopardy
C Jeopardy is loosely based on the Jeopardy! game show. The questions are phrased in the form of an answer and are answered in the form of a question.
There are approximately 1,330 questions. All of the questions are sentences extracted from the C11 draft standard PDF, with certain nouns or phrases replaced with `this`. The goal of the game
is to answer the correct noun or phrase.
The `cjeopardy` command displays a random C Jeopardy question. You can specify a search text to limit the random set to those containing that text.
Can be used to skip the current question after 5 minutes have elapsed.
<PBot> 1009) This macro expands to a integer constant expressions that can be used as the argument to the exit function to return successful termination status to the host environment.
Shows the personal C Jeopardy statistics for a player. If used without any arguments, it shows your own statistics.
Usage: `score [player name]`
#### rank
Shows ranking for various C Jeopardy statistics, or your personal rankings in each of the statistics. If used without any arguments, it shows the available keywords for which statistics to rank.
Usage: `rank [keyword or player name]`
#### reset
Resets your personal C Jeopardy statistics for the current session. Your life-time records will still be retained.
#### qstats
Shows statistics specific to a C Jeopardy question. Can also rank questions by a specific statistic.
Usage: `qstats [question id]`
Usage: `qstats rank [keyword or question id]`
#### qshow
Displays a specific C Jeopardy question without making it the current question. Useful for seeing which question belongs to a question id; .e.g. with `qstats`.
<PBot> Displaying #1 of 64 matches: 5.1.2.2.1p1: [Program startup] If they are declared, the parameters to the main function shall obey the following constraints: -- The value of argc shall be nonnegative. -- argv[argc] shall be a null pointer. -- If the value of argc is greater than zero, the array members argv[0] through argv[argc-1] inclusive shall contain pointers to st... truncated; see http://codepad.org/f2DULaGQ for full text.
<pragma-> Hmm, that was a bit long. I wanted just the part up to "nonnegative" ...
<pragma-> c99 pointer value -text ^.*?nonnegative
<PBot> Displaying #1 of 64 matches: 5.1.2.2.1p1: [Program startup] If they are declared, the parameters to the main function shall obey the following constraints: -- The value of argc shall be nonnegative ...
<PBot> Displaying #1 of 4 matches: 6.3.2.1p1: [Lvalues, arrays, and function designators] Except when it is the operand of the sizeof operator or the unary & operator, or is a string literal used to initialize an array, an expression that has type ``array of type is converted to an expression with type ``pointer to type that points to the initial element of the array ob... truncated; see http://codepad.org/mf1RNnr2 for full text.
<PBot> Displaying #3 of 4 matches: 6.3.2.3p1: [Pointers] For any qualifier q, a pointer to a non-q-qualified type may be converted to a pointer to the q-qualified version of the type; the values stored in the original and converted pointers shall compare equal.
Displays manpage summaries and/or C related tidbits (headers, prototypes, specifications), as well as a link to the FreeBSD manpage.
Usage: `man [section] query`
<pragma-> man fork
<PBot> Includes: sys/types.h, unistd.h - pid_t fork(void); - SVr4, SVID, POSIX, X/OPEN, BSD - fork creates a child process that differs from the parent process only in its PID and PPID, and in the fact that resource utilizations are set to 0 - http://www.iso-9899.info/man?fork
<pragma-> man atexit
<PBot> Includes: stdlib.h - int aid (*function)(void)); - SVID 3, BSD 4.3, ISO 9899 - atexit () function registers the given function to be called at normal program termination, whether via exit(3) or via return from the program's main - http://www.iso-9899.info/man?atexit
<pragma-> man getcwd
<PBot> Includes: unistd.h - char *getcwd(char *buf, size_t size); - POSIX.1 - getcwd () function copies an absolute pathname of the current working directory to the array pointed to by buf, which is of length size - http://www.iso-9899.info/man?getcwd
### google
Displays google results for a query.
Usage: `google [number of results] <query>`
<pragma-> google brian kernighan
<PBot> brian kernighan (115,000): Brian Kernighan's Home Page: (http://www.cs.princeton.edu/~bwk/)
<!---->
<pragma-> google 3 brian kernighan
<PBot> brian kernighan (115,000): Brian Kernighan's Home Page: (http://www.cs.princeton.edu/~bwk/), An Interview with Brian Kernighan: (http://www-2.cs.cmu.edu/~mihaib/kernighan-interview/), Interview with Brian Kernighan | Linux Journal: (http://www.linuxjournal.com/article.php?sid=7035), Brian W. Kernighan: (http://www.lysator.liu.se/c/bwk/) ,Brian W. Kernighan: Programming in C: A Tutorial: (http://www.lysator.liu.se/c/bwk-tutor.html)
### define
### dict
Displays dictionary definitions from http://dict.org using DICT protocol.
Databases for the `-d` option are listed here: http://www.iso-9899.info/PBot/dict_databases.txt -- Note that there may be several commands aliased to one of these databases; for example, the `foldoc` command is an alias to `dict -d foldoc`.
Usage: `dict [-d database] [-n start from definition number] [-t abbreviation of word class type (n]oun, v]erb, adv]erb, adj]ective, etc)] [-search <regex> for definitions matching <regex>] <word>`
<pragma-> dict hit
<PBot> hit: n: 1) (baseball) a successful stroke in an athletic contest (especially in baseball); "he came all the way around on Williams' hit", 2) the act of contacting one thing with another; "repeated hitting raised a large bruise"; "after three misses she finally got a hit" [syn: hitting, striking], 3) a conspicuous success; "that song was his first hit and marked the beginning of his career"; "that new Broadway show is a real smasher"
<!---->
<pragma-> dict -n 4 hit
<PBot> hit: n: 4) (physics) an brief event in which two or more bodies come together; "the collision of the particles resulted in an exchange of energy and a change of direction" [syn: collision], 5) a dose of a narcotic drug, 6) a murder carried out by an underworld syndicate; "it has all the earmarks of a Mafia hit", 7) a connection made via the internet to another website; "WordNet gets many hits from users worldwide"
<!---->
<pragma-> dict -t v hit
<PBot> hit: v: 1) cause to move by striking; "hit a ball", 2) hit against; come into sudden contact with; "The car hit a tree"; "He struck the table with his elbow" [syn: strike, impinge on, run into, collide with] [ant: miss], 3) affect or afflict suddenly, usually adversely; "We were hit by really bad weather"; "He was stricken with cancer when he was still a teenager"; "The earstruck at midnight" [syn: strike], 4) deal a blow to
<!---->
<pragma-> dict -search ball hit
<PBot> hit: n: 1) (baseball) a successful stroke in an athletic contest (especially in baseball); "he came all the way around on Williams' hit", v: 1) cause to move by striking; "hit a ball"
Displays dictionary definitions from http://urbandictionary.com.
Usage: `udict <query>`
### wdict
Displays Wikipedia article abstracts (first paragraph). Note: case-sensitive and very picky.
Usage: `wdict <query>`
### acronym
Displays expanded acronyms.
Usage: `acronym <query>`
<pragma-> acronym posix
<PBot> posix (3 entries): Portable Operating System for Information Exchange, Portable Operating System Interface Extensions (IBM), Portable Operating System Interface for Unix
<pragma-> acronym linux
<PBot> linux (1 entries): Linux Is Not UniX
### math
### calc
Evaluate calculations. Can also perform various unit conversions.
Usage: `math <expression>``calc <expression>`
<pragma-> calc 5 + 5
<PBot> 5 + 5 = 10
<!---->
<pragma-> calc 80F to C
<PBot> pragma-: 80F to C = 26.6666666666667 C
### qalc
Evaluate calculations using the `QCalculate!` program.
Usage: `qalc <expression>`
### compliment
Displays a random Markov-chain compliment/insult.
Usage: `compliment [nick]`
### insult
Displays a random insult.
Usage: `insult [nick]`
### excuse
Displays a random excuse.
Usage: `excuse [nick]`
### horoscope
Displays a horoscope for a Zodiac sign (google this if you don't know your sign).
Usage: `horoscope <sign>`
### quote
Displays quotes from a popular quotation database. If you use `quote` without arguments, it returns a random quote; if you use it
with an argument, it searches for quotes containing that text; if you add `--author <name>` at the end, it searches for a quote by
that author; if you specify `text` and `--author`, it searches for quotes by that author, containing that text.
<PBot> "Each success only buys an admission ticket to a more difficult problem." -- Henry Kissinger (1923 - ).
<pragma-> quote --author lao tzu
<PBot> 41 matching quotes found. "A journey of a thousand miles begins with a single step." -- Lao-tzu (604 BC - 531 BC).
<pragma-> quote butterfly
<PBot> 11 matching quotes found. "A chinese philosopher once had a dream that he was a butterfly. From that day on, he was never quite certain that he was not a butterfly, dreaming that he was a man." -- Unknown.
