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Disc to find the problem. Has 20 random numbers to form a circle (end to end), respectively, obtaining four consecutive number and the largest of the four-digit and value) as well as four consecutive numbers and a minimum of four number (output of the entire series, maximum, minimum number of four and values. requirements: 1) the Disc class circle contains private member int num [20], int Max [4], int Min [4], int sum_max, int sum_min, at the same time according to the need to increase the private or public members and public member functions. 2) The random number generated in the program 20.