《c++ primer 5th》chapter10-ex10.26_ex10.42

• 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 10.26

Exercise 10.27

Exercise 10.28

Exercise 10.29

Exercise 10.30

Exercise 10.31

Exercise 10.32

Exercise 10.33

Exercise 10.34

Exercise 10.35

Exercise 10.36

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Exercise 10.38

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Exercise 10.40

Exercise 10.41

Exercise 10.42