Qcl can be obtained online from: http://tph.tuwien.ac.at/~oemer/qcl.html
Qcl can be difficult to compile using recent versions of gcc/g++. You can download the precompiled version here
The precompiled version contains the documentation from the official website in the ./doc subdirectory, as well as examples in the ./lib subdirectory.
Some example code for qcl is available here.
Execute it using
qcl b 5 i example.qcl.
The file is text, and I encourage you to look through it. If you have any questions, e-mail me.