athos@2144: #include <lemon/lp.h>
athos@2144: //#include <lemon/ilp_glpk.h>
athos@2144: 
athos@2144: using namespace lemon;
athos@2144: 
athos@2144: int main(){
athos@2144: 
athos@2144:   //MipGlpk ilp;
athos@2144: 
athos@2144:    Mip ilp;
athos@2144: 
athos@2144:     
athos@2144:   typedef Mip::Row Row;
athos@2144:   typedef Mip::Col Col;
athos@2144:   
athos@2144:   ilp.max();
athos@2144:   
athos@2144:   Col x1 = ilp.addCol();
athos@2144:   Col x2 = ilp.addCol();
athos@2144:   Col x3 = ilp.addCol();
athos@2144:   
athos@2144:   ilp.integer(x1,true);
athos@2144:   ilp.integer(x2,true);
athos@2144:   ilp.integer(x3,true);
athos@2144:   
athos@2144:   ilp.addRow(x1+x2+x3 <=100);  
athos@2144:   ilp.addRow(10*x1+4*x2+5*x3<=600);  
athos@2144:   ilp.addRow(2*x1+2*x2+6*x3<=300); 
athos@2144:   
athos@2144:   ilp.colLowerBound(x1, 0);
athos@2144:   ilp.colLowerBound(x2, 0);
athos@2144:   ilp.colLowerBound(x3, 0);
athos@2144:   //Objective function
athos@2144:   ilp.setObj(10*x1+6*x2+4*x3);
athos@2144:   
athos@2144:   //Call the routine of the underlying LP solver
athos@2144:   ilp.solve();
athos@2144:   
athos@2144:   //Print results
athos@2144:   if (ilp.primalStatus()==LpSolverBase::OPTIMAL){
athos@2144:     std::cout<<"Optimal solution found!"<<std::endl;
athos@2144:     printf("optimum value = %g; x1 = %g; x2 = %g; x3 = %g\n", 
athos@2144:            ilp.primalValue(), 
athos@2144:            ilp.primal(x1), ilp.primal(x2), ilp.primal(x3));
athos@2144:   }
athos@2144:   else{
athos@2144:     std::cout<<"Optimal solution not found!"<<std::endl;
athos@2144:   }
athos@2144: 
athos@2144: }