PseudoEngine 2

A pseudocode interpreter designed to be compatible with the Cambridge IGCSE and A level pseudocode syntax

The REPL

The REPL stands for Read Execute Print Loop. It's an interactive interface where you can type pseudocode statements one by one. Each statement is immediately run, and the result or any errors are shown right away. This is helpful for quickly testing small pieces of code and experimenting with syntax without needing to create a full file.

> OUTPUT "Hello World!"
Hello World!
> 5 + 2 * 3
11
> LEFT("ABCD", 2)
"AB"
> x <- 1 / 0

Runtime Error in file <stdin>:
Division by 0

Traceback:
Program, line 1, column 9

Usage

Launching the REPL

Lanuch the program directly by double clicking the executable
OR
Run it in the terminal with no arguments

Running files in the REPL

The REPL can be used to run files using RUNFILE <file>.
For example, here is a simple hello world program stored in the file hello.pseudo

OUTPUT "Hello World!"

You can run it like this:

> RUNFILE hello.pseudo
==> Running file 'hello.pseudo'
Hello World!

==> Program exited successfully
> 

Tip: For RUNFILE to work easily, place your .pseudo file in the same folder as the PseudoEngine2 executable. Otherwise, you'll need to provide the full path to your file (e.g., RUNFILE /path/to/your/hello.pseudo).

Running files directly from the terminal

You can also run a pseudocode file directly when you launch PseudoEngine2 from the terminal.

Navigate to where your PseudoEngine2 executable is, and provide the path to your pseudocode file as an argument:

Windows:

PseudoEngine2.exe <filepath/your_program.pseudo>

Linux/Unix:

./PseudoEngine2 <filepath/your_program.pseudo>

Make sure you replace PseudoEngine2 with the actual name of the executable or rename the executable

Example programs

See examples

Building from source

Make sure cmake and a c++ compiler is installed, then clone the repository and inside its folder run the following commands:

cmake -B build -DCMAKE_BUILD_TYPE=Release
cmake --build build

The executable will be generated inside the build folder