C++ How to Program, 10/e

... Rolling a Six-Sided Die

Figure 6.10 uses the default_random_engine and the uniform_int_distribution to roll a six-sided die. Line 13 creates a default_random_engine object named engine. Its constructor argument seeds the random-number generation engine with the current time. If you don’t pass a value to the constructor, the default seed will be used and the program will produce the same sequence of numbers each time it executes—this is useful for testing purposes. Line 14 creates randomInt—a uniform_int_distribution object that produces unsigned int values (as specified by <unsigned int>) in the range 1 to 6 (as specified by the constructor arguments). The expression randomInt(engine) (line 19) returns one unsigned int value in the range 1 to 6.