《c++ primer 5th》chapter8-ex8.1_ex8.14

• 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 8.1

Exercise 8.2

Exercise 8.3

Exercise 8.4

Exercise 8.5

Exercise 8.6

Exercise 8.7

Exercise 8.8

Exercise 8.9

Exercise 8.10

Exercise 8.11

Exercise 8.12

Exercise 8.13

Exercise 8.14