ILOG OPL Development Studio Language Reference Manual

Initializing arraysYou can initialize arrays:♦Externally♦Internally♦In preprocessing instructions♦As generic arrays♦As generic indexed arraysExternallyArrays can be initialized by external data, in which case the declaration has the form:int a[1..2] [1..3] = ...;and the actual initialization is given in a data source, which is a separate .dat file inILOG OPL.Listing valuesThis is how arrays are initialized in most of the examples presented so far. Multidimensionalarrays in OPL are, in fact, arrays of arrays and must be initialized accordingly. For example,the declaration:/* .mod file */int a[1..2][1..3] = ...;/* .dat file */a = [[10, 20, 30],[40, 50, 60]];initializes a two-dimensional array by giving initializations for the one-dimensional arrays ofits first dimension. It is easy to see how to generalize this initialization to any number ofdimensions.Specifying pairsAn array can also be initialized by specifying pairs (index, value), as in the declaration:/* .mod file */int a[Days] = ...;42I L O G O P L D E V E L O P M E N T S T U D I O L A N G U A G ER E F E R E N C E M A N U A L