The complete simplified car sequencing program follows. You can also view it online in the file YourSolverHome/examples/src/carseq_basic.cpp.

#include <ilsolver/ilosolverint.h>
 
ILOSTLBEGIN
const char* Names[] = {"green", "yellow", "blue"};
int main() {
  IloEnv env;
  try {
    IloModel model(env);
    const IloInt nbCars    = 8;
    const IloInt nbColors = 3;
    IloInt i;
    IloIntVarArray cars(env, nbCars, 0, nbColors-1);
    IloIntArray colors(env, 3, 0, 1, 2);
    IloIntVarArray cards(env, nbColors);
    cards[0] = IloIntVar(env, 0, 3);
    cards[1] = IloIntVar(env, 3, 3);
    cards[2] = IloIntVar(env, 0, 2);
    model.add(IloDistribute(env, cards, colors, cars));
    model.add(cars[0] != 0);
    IloSolver solver(model);
    if (solver.solve(IloGenerate(env, cars, IloChooseMinSizeInt)))
      {
      solver.out() << solver.getStatus() << " Solution" << endl;
      for (i = 0; i < nbCars; i++) {
        solver.out() << "Car " << i+1 <<  " color:     "
                     << Names[(IloInt)solver.getValue(cars[i])]     
                     << endl;
      }
    }
    else
      solver.out() << "No solution " << endl;
      solver.printInformation();
  }
  catch (IloException& ex) {
    cout << "Error: " << ex << endl;
  }
  env.end();
  return 0;
}
 

Results

You should get the following results, though the information displayed by IloSolver::printInformation will vary depending on platform, machine, configuration, and so on.

Feasible Solution
Car 1 color:     yellow
Car 2 color:     green
Car 3 color:     green
Car 4 color:     green
Car 5 color:     yellow
Car 6 color:     yellow
Car 7 color:     blue
Car 8 color:     blue
Number of fails               : 0
Number of choice points       : 6
Number of variables           : 12
Number of constraints         : 2
Reversible stack (bytes)      : 4044
Solver heap (bytes)           : 8064
Solver global heap (bytes)    : 4044
And stack (bytes)             : 4044
Or stack (bytes)              : 4044
Search Stack (bytes)          : 4044
Constraint queue (bytes)      : 11152
Total memory used (bytes)     : 39436
Elapsed time since creation   : 0.17