测试输入值 [英] testing input values

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本文介绍了测试输入值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

嗨:


我正试图找到一种测试输入值的方法。

为了测试一个整数,我尝试了这段代码:

******代码******

int input_number;

cin>> input_number;

while(!input_number)

cout<<<"""""<<<<< endl;

******结束代码**** **

当我输入字符或字符串时我没有收到错误消息。如果有人可以帮我解决这个问题,我会感激。$ />

谢谢。

Hi:

I''m trying to find a way to test input values.
To test an integer I tried this code:
******Code******
int input_number;
cin>>input_number;
while(!input_number)
cout<<"invalid input"<<endl;
******End Code******
when I enter a character or a string I don''t get the error message. I would
appreciate if someone could help me solve this problem.

Thanks.

推荐答案



" TechNovice" < AP ********* @ hotmail.com>在消息中写道

news:yjmjb.91087

"TechNovice" <ap*********@hotmail.com> wrote in message
news:yjmjb.91087


k74.57013@lakeread05 ...
k74.57013@lakeread05...
嗨:
<我正在试图找到一种测试输入值的方法。
为了测试整数,我尝试了这段代码:
******代码******
int input_number;
cin>> input_number;
while(!input_number)


测试流,而不是int对象。如果读取

失败,则int对象不受影响。


while(!cin)

{

cout<<"无效输入"<< endl;


//然后在我们读取更多数据之前我们必须

//重置流状态:


cin.clear();


//并提取并丢弃有问题的字符:

cin.ignore(numeric_limits< streamsize> :: max(), ''\ n'');


''numeric_limits''由< limits>声明。

''streamsize''由<声明; ios>

******结束代码******
当我输入字符或字符串时,我不会收到错误消息。如果有人可以帮我解决这个问题,我会很感激。
Hi:

I''m trying to find a way to test input values.
To test an integer I tried this code:
******Code******
int input_number;
cin>>input_number;
while(!input_number)
Test the stream, not the int object. If the read
failed, the int object was not affected.

while(!cin)
{
cout<<"invalid input"<<endl;
// then before we can read more data we must
// reset the stream state:

cin.clear();

// and extract and discard the offending characters:
cin.ignore(numeric_limits<streamsize>::max(), ''\n'');

''numeric_limits'' is declared by <limits>
''streamsize'' is declared by <ios>
******End Code******
when I enter a character or a string I don''t get the error message. I would appreciate if someone could help me solve this problem.




HTH,

-Mike



HTH,
-Mike




" Mike Wahler" < MK ****** @ mkwahler.net>在消息中写道

news:rJ ***************** @ newsread3.news.pas.earthl ink.net ...

"Mike Wahler" <mk******@mkwahler.net> wrote in message
news:rJ*****************@newsread3.news.pas.earthl ink.net...

TechNovice < AP ********* @ hotmail.com>在消息中写道
新闻:yjmjb.91087

"TechNovice" <ap*********@hotmail.com> wrote in message
news:yjmjb.91087


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