用逗号输入整数 [英] Inputting integers with commas
问题描述
怎么办？这么简单＃@％^& @的东西，我花了好几个小时。
例如，
long mynum ;
istringstream mystr（" 380,900"，istringstream :: in）;
mystr>> mynum;
cout<< mynum;
收益率为380。
我试过设置mystr的语言环境，
mystr.imbue（locale（" en_US"））;
各种各样的东西，但没有快乐。
是，我知道我可以迭代并删除逗号，但是我希望
希望有一个更优雅和/或内置的解决方案。
-
％Randy Yates％" Bird，在翼上，
%% Fuquay-Varina，NC％漂浮在
%%% 919- 577-9882％，但他眼中有泪滴......
%%%%< ya *** @ ieee.org> ％''一个夏日梦''，*面对音乐*，ELO
http ：//home.earthlink.net/~yatescr
How to do? Such a simple #@%^&@ thing and I''m spending hours on it.
For example,
long mynum;
istringstream mystr("380,900", istringstream::in);
mystr >> mynum;
cout << mynum;
yields "380".
I''ve tried setting the locale of mystr,
mystr.imbue(locale("en_US"));
to various things but no joy.
Yes, I know I could iterate through and .erase the commas, but I
was hoping there was a more elegant and/or built-in solution.
--
% Randy Yates % "Bird, on the wing,
%% Fuquay-Varina, NC % goes floating by
%%% 919-577-9882 % but there''s a teardrop in his eye..."
%%%% <ya***@ieee.org> % ''One Summer Dream'', *Face The Music*, ELO
http://home.earthlink.net/~yatescr
推荐答案
Randy Yates schrieb：
Randy Yates schrieb:
怎么办？这么简单＃@％^& @的事情，我花了好几个小时。
例如，
长的mynum;
istringstream mystr（" 380,900"，istringstream :: in）;
mystr>> mynum;
cout<< mynum;
收益率" 380"。
How to do? Such a simple #@%^&@ thing and I''m spending hours on it.
For example,
long mynum;
istringstream mystr("380,900", istringstream::in);
mystr >> mynum;
cout << mynum;
yields "380".
正确地说，你只读第一个数字; - ）
除此之外你可以把逗号读成char：
char c;
long mynum1，mynum2;
mystr>> mynum1>> c>> mynum2;
HTH，
Malte
And correctly so, you''re only reading the first number ;-)
Apart from that you could just read the comma into a char:
char c;
long mynum1, mynum2;
mystr >> mynum1 >> c >> mynum2;
HTH,
Malte
Malte Starostik schrieb：
Malte Starostik schrieb:
Randy Yates schrieb：
Randy Yates schrieb:
怎么办？这么简单＃@％^& @的东西，我花了好几个小时。
例如，
long mynum;
istringstream mystr（ 380,900，istringstream :: in）;
mystr>> mynum;
cout<< mynum;
收益率" 380"。
How to do? Such a simple #@%^&@ thing and I''m spending hours on it.
For example,
long mynum;
istringstream mystr("380,900", istringstream::in);
mystr >> mynum;
cout << mynum;
yields "380".
正确地说，你只读第一个数字; - ）
And correctly so, you''re only reading the first number ;-)
抱歉，我认为逗号不应该分开单个
数字而是千分隔符？ （不习惯，在我的de_DE语言环境中
千分隔符是a。而小数点是a，）
在这种情况下可能是这样的：
long mynum;
istringstream mystr（" 380,900"，istringstream :: in）;
for（mynum = 0; mystr;）
{
long tmp;
if（mystr>> tmp）mynum + = tmp;
char c;
if（mystr>> c&& c ==''，''）mynum * = 1000;
}
cout<< mynum<< endl;
错误检查虽然非常不理想，但它读取的内容如
380，-900为379100,380,1,0为380001000等。
问候，
Malte
Sorry, I gather that comma is not supposed to separate individual
numbers but a thousand separator? (not used to that, in my de_DE locale
the thousand separator is a . while a decimal point is a ,)
In that case maybe something like this:
long mynum;
istringstream mystr("380,900", istringstream::in);
for ( mynum = 0; mystr; )
{
long tmp;
if (mystr >> tmp) mynum += tmp;
char c;
if (mystr >> c && c == '','' ) mynum *= 1000;
}
cout << mynum << endl;
The error checking is quite suboptimal though and it reads things like
380,-900 as 379100, 380,1,0 as 380001000 etc.
Regards,
Malte
Malte Starostik< ma ******* ******@t-online.de>写道：
Malte Starostik <ma*************@t-online.de> writes:
Randy Yates schrieb：
Randy Yates schrieb:
怎么办？这么简单的＃@％^& @的东西，我花了好几个小时才开始。例如，
long mynum;
istringstream mystr（" 380,900"，istringstream :: in）;
mystr>> mynum;
cout<< mynum;
收益率380。
正确地说，你只读了第一个数字
How to do? Such a simple #@%^&@ thing and I''m spending hours on
it. For example,
long mynum;
istringstream mystr("380,900", istringstream::in);
mystr >> mynum;
cout << mynum;
yields "380".
And correctly so, you''re only reading the first number
我明白了。因此，当你的老板给你发电子邮件并询问
Hey Malte，请为公司野餐订购1,173件T恤，
you比如说，
嘿老板，这是1或173？
;（
;-)
除此之外你可以把逗号读成char：
char c;
long mynum1，mynum2;
mystr>> mynum1>> c>> mynum2;
正如我所说，我知道有各种各样的方法 - 我正在寻找
优雅/正确的方式。
HTH，
不是真的。
Malte
I see. So when your boss emails you and asks
"Hey Malte, please order 1,173 T-Shirts for the company picnic",
you say,
"Hey boss, which is it, 1 or 173?"
;(
;-)
Apart from that you could just read the comma into a char:
char c;
long mynum1, mynum2;
mystr >> mynum1 >> c >> mynum2;
As I said, I know there are ways AROUND it - I was looking for the
elegant/proper way.
HTH,
Not really.
Malte
-
％Randy Yates％"也许有一天我会感受到她冷酷的拥抱，
%% Fuquay-Varina，NC％并亲吻她的界面，
％ %% 919-577-9882％直到那时，我会离开她。
%%%%< ya *** @ ieee.org> ％''你的真实，2095'，*时间*，ELO
http： //home.earthlink.net/~yatescr
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