russcip

A safe Rust interface for SCIP. The project is currently an early-stage work in progress, issues/pull-requests are very welcome.

This crate also exposes access to the SCIP's C-API through the ffi module.

Dependencies

make sure SCIP 8.0.3 is installed and included in the library path, or define an environment variable SCIPOPTDIR with the install directory.

Install

By running

cargo add russcip

or to get the most recent version, add the following to your Cargo.toml

[dependencies]
russcip = { git = "https://github.com/mmghannam/russcip" }

Example

Model and solve an integer program.

use russcip::model::Model;
use russcip::model::ObjSense;
use russcip::status::Status;
use russcip::variable::VarType;

fn main() {
    // Create model
    let mut model = Model::new();
    model.include_default_plugins();
    model.create_prob("test");
    model.set_obj_sense(ObjSense::Maximize);
    model.hide_output();

    // Add variables
    let x1 = model.add_var(0., f64::INFINITY, 3., "x1", VarType::Integer);
    let x2 = model.add_var(0., f64::INFINITY, 4., "x2", VarType::Integer);

    // Add constraints
    model.add_cons(&[&x1, &x2], &[2., 1.], -f64::INFINITY, 100., "c1");
    model.add_cons(&[&x1, &x2], &[1., 2.], -f64::INFINITY, 80., "c2");

    model.solve();

    let status = model.get_status();
    println!("Solved with status {:?}", status);

    let obj_val = model.get_obj_val();
    println!("Objective value: {}", obj_val);

    let sol = model.get_best_sol();
    let vars = model.get_vars();

    for var in vars {
        println!("{} = {}", &var.get_name(), sol.get_var_val(&var));
    }
}