Entry is designed as a utility program for users of CACTOS (Wensel, Daugherty, and Meerschaert, 1986) and CRYPTOS (Wensel, Krumland, and Meerschaert, 1987). The program is designed to easily create or edit stand description files without dealing with intricate format specifications. Records can be viewed, entered, and edited by using one-letter commands that are displayed on the computer screen. The executable computer code is designed for use with MS-DOS computers. While the vast majority of the source code for the program is written in standard FORTRAN-77, it uses machine-dependent screen and keyboard control to allow full screen editing instead of the traditional scrolling display. This allows Entry to be intuitive and easy to use, but complicates migration to other host systems, such as mini-computers and mainframes. For examination of stand descriptions in a concatenated file, STAG (Biging and Meerschaert, 1987) or GENR (Krumland and Wensel, 1980) is recommended. These programs have the ability not only of displaying tree lists, but also of displaying diameter distributions, stand profiles, and stock tables. Entry should be reserved for manipulating the numbers in the files and entering new data. STAND DESCRIPTIONS IN THE CACTOS AND CRYPTOS SYSTEMS Both CACTOS and CRYPTOS operate on a sample tree list which describes the forest stand on which the simulator operates. Frequently, this stand description is only one of many from an inventory or growth study. For this reason, both of the simulators have a batch processing mode where multiple concatenated files can be run through the simulator using the same or several alternate prescriptions. Entry has the ability to work with a file containing any number of concatenated stand descriptions. The basic format of the stand description is the same for both CACTOS and CRYPTOS. The only difference is in the the species codes, which range from 1 to 14 for CACTOS and 1 to 8 for CRYPTOS. The basic layout of the individual stand description is shown below. Note that a concatenated stand description would have this structure repeated for each of the samples in the file, one right after the other with no blank lines. Line(1) Stand description label (20 characters), tree record count, elevation, number of years to grow in the first growth cycle, and a number which indicates the file type. These indicators are shown in the following table: code meaning 0 or 1 raw data file with all heights measured in feet to the tip of the tree 2 heights are in feet to the merch. top 3 heights are in 16.5 foot logs above a 1.5 foot stump 4 heights are in 1/2 logs The indicator is set to 100 by CACTOS or CRYPTOS when an external save is performed in order to distinguish these from stand descriptions without pseudo-stochastic quintupling (see Initialization Routine and Program Defaults in the CACTOS or CRYPTOS User's Guide). Line(2) Fifty-year (breast height) site indices for all of the species present on the plot in order of their species codes, shown below. Zeros or blanks may be entered for species not present on the plot. Line(3) Optional breast height ages for the species in the order given for site index in line 2. Zeroes or blanks may be entered if actual values are unknown. (Age is a descriptive variable only and is not needed for the simulator to function.) Line(4-end) Individual tree records follow, one per line. Each tree record has the following five items: species number (see below) DBH in inches total height in feet live crown ratio (decimal fraction) or height to the base of the live crown per-acre expansion (i.e. the number of trees per acre represented by this tree record)
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