if you have:
typedef struct{
int data, value, frequency;
} datatype;
typedef datatype data_array[MAXNUM];
typedef data_array *data_array_pointer;
typedef data_array_pointer pointer_matrix_type[MAXNUM];
pointer_matrix_type array;
then to access, say the data field, of each datatype struct, say
(*array[i])[j].data
bb