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Life & fun · May 7, 2026

Ced – C REPL in 50 lines of POSIX shell

Yesterday, I found myself writing a little C throwaway script to test something out. That happens often enough to clutter my HOME and some other directories with these useless text files and binaries. So I thought that I can use a repl instead. Quick google search didn't find any good and tested solutions. So I wrote my own with help of a tcc compiler. Why POSIX Shell? Because it would be far too easy in a normal language (it'd probably take me ~10 minutes to rewrite this in Nim) and where is fun in that?

Ced – C REPL in 50 lines of POSIX shell launched on May 7, 2026 with 5 votes, #2,008 of 20,538 launches that month and more than 75% of that year's launches.

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What it does

ced - C REPL in 50 lines of POSIX shell + awk

ced is an interactive C REPL. Type a line, press Return, and see the result immediately. A minimal valid C program is maintained behind the scene. #include <stdio.h> int main() { return 0; } and positions you at line 3 (inside main). All line numbers are 1-indexed. Enter a statement without a semicolon and press Return to run it immediately. If the line is not a preprocessor directive, semicolon will be appended automatically. To continue a statement across multiple lines, end a line with ; or { and press Return. The following line will be joined to the previous one. It won't be executed until you submit the normal statement. To split a statement across lines while preserving the line…from codeberg.org

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