《c++ primer 5th》chapter9-ex9.1_ex9.30

• do while条件语句内要使用的变量必须定义在do while语句外；
• do while条件语句内不能定义任何变量；

Exercise 9.1

Exercise 9.2

Exercise 9.3

Exercise 9.4

Exercise 9.5

Exercise 9.6

Exercise 9.7

Exercise 9.8

Exercise 9.9

Exercise 9.10

Exercise 9.11

Exercise 9.12

Exercise 9.13

Exercise 9.14

Exercise 9.15

Exercise 9.16

Exercise 9.17

Exercise 9.18

Exercise 9.19

Exercise 9.20

Exercise 9.21

Exercise 9.22

Exercise 9.23

Exercise 9.24

Exercise 9.25

Exercise 9.26

Exercise 9.27

Exercise 9.28

Exercise 9.29

Exercise 9.30