如何读取整数的一部分 [英] How to read a part of an integer
问题描述
我需要通过另一个变量读取整数的一部分。
例如，
如果用户输入761120921，
然后，i = 761120921
j = 76
k = 112
l = 0921。
你能解释我怎么做到这一点吗？
panther写道：
我需要通过另一个变量读取整数的一部分。
例如，
如果用户输入761120921，
那么，i = 761120921
j = 76
k = 112
l = 0921那样。
你能解释我怎么实现这个？
你需要手动分割数字。首先，你需要0921或921
作为最后一个号码吗？因为如果你不想放弃零，你就可以在字符串级别工作
。如果你想要放弃零，而你只是想要通常用整数工作，你可以通过
取得
的最后四位数。
i％10000;
然后去高位数字
i / = 10000;
问候，
Zeppe
5月3日下午12:53，豹< tharaka ... @ gmail.comwrote：
我需要读取整数的一部分另一个变量。
例如，
如果用户输入761120921，
那么，i = 761120921
j = 76
k = 112
l = 0921那个。
你能解释我怎么做到这一点？
豹的反应是正确的方法。
但是，如果你只需要将整数转换为字符串，你
可以使用itoa（int）或其他一些类似的功能。
panther< th **** **** @ gmail.com写道：
我需要通过另一个变量读取整数的一部分。
例如，
如果用户输入761120921，
那么，i = 761120921
j = 76
k = 112
l = 0921那个。
你能解释我怎么做到这一点？
一种方法是使用％和/运算符。例如，
i = 761120921
j = i / 10000000
k =（i / 10000）％1000
l = i％1000
另一种方法是以字符串形式读取数字，并使用
string :: substr（）函数。
-
Marcus Kwok
用''net''替换''invalid''回复
Hi,
I need to read part of an integer by another variable.
As example,
if user enter 761120921,
then, i = 761120921
j = 76
k = 112
l = 0921 as that.
can you explain how do i acheive this?
panther wrote:Hi,
I need to read part of an integer by another variable.
As example,
if user enter 761120921,
then, i = 761120921
j = 76
k = 112
l = 0921 as that.
can you explain how do i acheive this?
you need to split the number manually. At first, do you need 0921 or 921
as a last number? because if you don''t want to loose the zero you have
to work at a string level. If you want to loose the zero, and you just
want to work generally with integers, you can just for example take the
last four digits by doing
i % 10000;
and then go for the high order digits by
i /= 10000;
Regards,
Zeppe
On May 3, 12:53 pm, panther <tharaka...@gmail.comwrote:Hi,
I need to read part of an integer by another variable.
As example,
if user enter 761120921,
then, i = 761120921
j = 76
k = 112
l = 0921 as that.
can you explain how do i acheive this?panther''s response is the right way to do it.
However, if you simply need to turn the integer into a string, you
could use itoa(int) or a some other comparable functions.
panther <th********@gmail.comwrote:I need to read part of an integer by another variable.
As example,
if user enter 761120921,
then, i = 761120921
j = 76
k = 112
l = 0921 as that.
can you explain how do i acheive this?One way would be to use the % and / operators. For example,
i = 761120921
j = i / 10000000
k = (i / 10000) % 1000
l = i % 1000
Another way would be to read the number in as a string, and use the
string::substr() function.
--
Marcus Kwok
Replace ''invalid'' with ''net'' to reply
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