【C++Primer(5thEdition)Exercise】练习程序Chapter8（第八章）（13）

以下程序由 Teddy van Jerry &＃xff08;我自己&＃xff09;编写并运行&＃xff0c;基本保证正确性。&＃xff08;有时可能会为优化程序超前使用某些内容&＃xff09;

Before we comb through the codes

&＃xff08;I am still working on this chapter.&＃xff09;
Review:
【C&＃43;&＃43; Primer(5th Edition) Exercise】练习程序 - Chapter 1&＃xff08;第一章&＃xff09;
【C&＃43;&＃43; Primer(5th Edition) Exercise】练习程序 - Chapter 2&＃xff08;第二章&＃xff09;
【C&＃43;&＃43; Primer(5th Edition) Exercise】练习程序 - Chapter 3&＃xff08;第三章&＃xff09;
【C&＃43;&＃43; Primer(5th Edition) Exercise】练习程序 - Chapter 4&＃xff08;第四章&＃xff09;
【C&＃43;&＃43; Primer(5th Edition) Exercise】练习程序 - Chapter 5&＃xff08;第五章&＃xff09;
【C&＃43;&＃43; Primer(5th Edition) Exercise】练习程序 - Chapter 6&＃xff08;第六章&＃xff09;
【C&＃43;&＃43; Primer(5th Edition) Exercise】练习程序 - Chapter 7&＃xff08;第七章&＃xff09;

TIP:标有(C&＃43;&＃43;/11)者为C&＃43;&＃43;/11标准下可以使用的题&＃xff0c;若为老版本应加以修改。

Exercise 8.1

#include
using namespace std;istream& read(istream& is)
{string input;while (!is.eof() && is >> input) // if not the end of file{cout << input << endl;}is.clear();return is;
}int main()
{read(cin);return 0;
}


或者&＃xff1a;

#include
using namespace std;istream& read(istream& is)
{string input;while (!(is >> input).eof()) // if not the end of file{cout << input << endl;}is.clear();return is;
}int main()
{read(cin);return 0;
}


Exercise 8.2

见 Exercise 8.1

Exercise 8.3

It is equivalent to:

while(1){cin >> i;if (!cin.fail() && !cin.bad() && !cin.eof()){// do something}else break;}


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