1. There are 10 judges scoring (remove one highest and one lowest) to get the average score.
2. Learn about Java random numbers by yourself, generate a random array of length 10 (each number ranges from 0 to 99), and output after sorting.
3. Make 7 out of 35 lottery programs. (That is, 1 ~ 35 randomly generates 7 non-repeating numbers)
4. Define an int array with a length of 10, and count the maximum, minimum, and odd and even numbers in the array.
