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crepl is a simple REPL (read-eval-print loop) for C, implemented in Perl.

Usage:

Enter a single line of C code. It will be wrapped in a simple C program, compiled, and executed if compilation was successful.

Type h, help, or ? for a usage message.

The generated program, by default, is:

#include <stdio.h>
int main(void) {
    /* YOUR LINE HERE */
    ;
}

The added ; lets you omit the trailing semicolon on the entered statement.

crepl uses Perl's Term::ReadLine module, so it supports line editing.

By default, the C program has #include <stdio.h> at the top. More headers can be added to the list with include command:

{} include <stdlib.h>

Adding <math.h> or <tgmath.h> adds -lm to the compiler command line.

Type include by itself to list the current include list.

Multiple input lines are not combined; the body of the C program is just the one line you entered. Of course you can enter multiple statements on a single line. No state is kept from one line to the next, other than the list of included headers.

The C program is compiled with gcc -std=c11 -pedantic-errors.