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Games::Dice simulates die rolls. It uses a function-oriented (not object-oriented) interface. No functions are exported by default. At present, there are two functions which are exportable: 'roll' and 'roll_array'. The latter is used internally by 'roll', but can also be exported by itself. The number and type of dice to roll is given in a style which should be familiar to players of popular role-playing games: _a_d_b_[+-*/b]_c_. _a_ is optional and defaults to 1; it gives the number of dice to roll. _b_ indicates the number of sides to each die; the most common, cube-shaped die is thus a d6. % can be used instead of 100 for _b_; hence, rolling 2d% and 2d100 is equivalent. 'roll' simulates _a_ rolls of _b_-sided dice and adds together the results. The optional end, consisting of one of +-*/b and a number _c_, can modify the sum of the individual dice. +-*/ are similar in that they take the sum of the rolls and add or subtract _c_, or multiply or divide the sum by _c_. (x can also be used instead of *.) Hence, 1d6+2 gives a number in the range 3..8, and 2d4*10 gives a number in the range 20..80. (Using / truncates the result to an int after dividing.) Using b in this slot is a little different: it's short for "best" and indicates "roll a number of dice, but add together only the best few". For example, 5d6b3 rolls five six- sided dice and adds together the three best rolls. This is sometimes used, for example, in roll-playing to give higher averages. Generally, 'roll' probably provides the nicer interface, since it does the adding up itself. However, in some situations one may wish to process the individual rolls (for example, I am told that in the game Feng Shui, the number of dice to be rolled cannot be determined in advance but depends on whether any 6's were rolled); in such a case, one can use 'roll_array' to return an array of values, which can then be examined or processed in an application-dependent manner.
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