Two dimensional DSP array declaration http://www.eventhelix.com/realtimemantra/object_oriented/object_design_tips_2.htm

two-dimensional-dsp-array.cpp

// Each Signal Processor Card contains 32 DSPs. 
// This is represented by a two dimensional
// array of DSP objects. The first dimension 
// is the Signal Processor Card Id and the second
// dimension is the DSP id on the card
  
DSP m_dsp[MAX_SIGNAL_PROCESSOR_CARDS][MAX_DSPS_PER_CARD];