Data handling basics

model "Chess 3"
 uses "mmxprs"

 declarations
  R = 1..2                             ! Index range
  DUR, WOOD, PROFIT: array(R) of real  ! Coefficients
  x: array(R) of mpvar                 ! Array of variables
 end-declarations

 DUR   :: [3, 2]                       ! Initialize data arrays
 WOOD  :: [1, 3]
 PROFIT:: [5, 20]

 sum(i in R) DUR(i)*x(i) <= 160        ! Constraint definition
 sum(i in R) WOOD(i)*x(i) <= 200
 forall(i in R) x(i) is_integer

 maximize(sum(i in R) PROFIT(i)*x(i))
 writeln("Solution: ", getobjval)
end-model