In such a statement, when the expression satisfies 2 or 3, the statement 1 should be executed.

Because there is an empty statement in case 2, it has no break statement. Continue to execute the statement in case 3 until you encounter the break statement. Case3 has a break statement, so it terminates. If it does not continue to execute,

2.I < When = 100000, for example, when I=50000 and t=0, execute the case0 statement. Note: When I= 100000 (this is the only value), t= 1, but the processing statement cannot be written as case 1, but it should be case. I< In the case of 200000, we can compare the case of I= 100000 and 100000.

100000 & lt； I & lt=200000, for example, I= 150000, and your t = I/100000; T is plastic, so the case of t= 1 or 2(t=2) leaves 200,000.

200000 & lt I & lt=400000, t=2 or 3 or 4 (the case of 4 will be discussed later), so case2 and case3 in the program should execute the same statement.

400000 & lt I< when =600000, t=4 or 5 or 6 (the case of 6 will be discussed later), case4 and case5 execute the same statement, and the statement should be written as case5.

600000 & lt I< when = 1000000, t=6, 7, 8, 9,10 (to be processed later in the case of10), case6, 7, 8, 9 execute the same statement, and the statement should be written as case9.

Finally, you only need to compare the above situation of t= 10 with that of I> 1000000d, and you should write down your handling situation.