How to display floating-point numbers with a mantissa set to zero in C++? -

-

The following code shows floating-point numbers in scientific notation: 

  float foo = 1.0 ; :: Court :: setf (:: std :: ios :: scientist); :: std :: cout & lt; & Lt; Foo;

This produces this output: 

  1.000000e-000

What I would like to do is display floating Point numbers in a specific notation that are similar to scientific notation but set to zero with one Manthissa. With the same floating-point number above, it will be produced: 

  0.100000e + 001

In C, I believe it will be written like this : 

  printf ("% .6E", FU);

Update: OK, I do not really know how to do it in C. Update 2: An example using iostream formatting was incorrect. I modified it according to Michael Bore's comment.

If you want to do this with ostreams, then I think using 'aspects' It will be required that this small part of C ++ lets you control too much formatting, but you like it.

Here is a description of num_put , which formats the numbers you did not like, such as:

You can get your Ostream (literally Ostr.imbue () ) which will include a locale in which you will create numbers as a way of formatting. Want to

I suggest that to convert a number into a string, one should start by typing the function that you want. Once you have that, if you want to completely hog and place & amp; Aspect accessories, you can (or maybe you will decide that it is very complex, which is the end of most people).


Comments

Post a Comment

Popular posts from this blog

MySql variables and php -

-
I am getting an error with php in order to format mysql_query () in php to format this string What is the right way? SELECT SELECT SELECT (*) Agents @AgentCount; User_Agent_English, User_Angent_Oursal, US.___Gent_Aginal, COUNT (User_Agent_Percade) ACC, COUNT (*) / (AgentCount) Percentage by agents user_agent_preser order DEC limit limit 50; In PHP, how am i setting $ query $ query = "SELECT count (*) agents @ agentcount; SELECT user_agent_parsed, User_agent_original , COUNT (user_agent_parsed) ascount, COUNT (*) / (@AgentCount) as a percentage by user_agent_parced by URI date DESC limit 50 "; This exact query will work properly if I put it in MySQL directly through a command line session. Do I need to release two separate php calls from mysql_query () and store the results first? I get the following error: There is an error in your SQL syntax; Instead of using a sub-selection and instead of using the 'SELECT user_agent_parsed, user_agent_original, ne...
Read more

php - Laravel - Overriding a resource route into a different route filter group -

-
Does Laravel's routing work as expected? What I think, if I want to override a route, then I just have to give the expected route before each other. I have something like this: root :: group (array ('first' = & gt; 'defaultLoads' =); function () {root :: post 'Newsletter', 'newsletter controller @ store'); root: group (array ('(newsletter', 'newsletter controller');}}); That if I post this route, only http://domain.com/newsletter should run only the default loads route filter. However, when I call php Runs artisan routes , I get this: | | POST newsletter | newsletter.store | newslettercontroller@ store | default loads | login | | though it reads the route correctly (PHP artisan loads which The correct path is to the right place) but the file of the resource path even if it is not in the filter group, the path is affected. Then my question: How does it work Laravel? If so, do I post this -> Newsle...
Read more

url rewriting - How to implement the returnurl like SO in PHP? -

-
This URL should work even after the rewrite. Is this possible? Otherwise, I can only hardcoded everything If you are trying to create a login system with redirection You need to use the HTTP_REFERER header to find out where the user came from so that you can send it back there. The best way to do this is to use something like this in your login form: // - Login php & Lt; Input type = "password" name = "password" /> & Lt; Input type = "hidden" name = "returnrelale" value = "& lt ;? php echo $ redirectURL ;? & gt;" / & Gt; & Lt; / Form & gt; Please note that some ISP, browser or proxy will delete the referrer header, so you can not rely on each user to work fully. If you use a statement, to check whether the header exists or not, you can send those users back to the homepage or whatever. Edit If you are looking to use $ _SERVER ['REQUEST_URI'], if you are running Apache It sho...
Read more