objective c - Why does casting a large double to a long sometimes return a positive and other times return a negative value in C? -


I put it in the case of an iOS test and run it in the (32 bit iPad simulator): 

  Double Wow = 3166323616091.220215; NSLog (@ "Double:% F", WOW); NSLog (@ "long:% ld", (long) whu); NSLog (@ "double:% F", 3166323616091.220215); NSLog (@ "long:% ld", (long) 3166323616091.220215);   
 Output is:  
  2014-04-23 13:40: 50.904 extract [53336: 303] double: 3166323616091.220215 2014-04-23 13: 40: 50.905 ext. [53336: 303] Long: -2147483648 2014-04-23 13:40: 50.906 ext. [53336: 303] Double: 3166323616091.220215 2014-04-23 13:40:40: 50.907 Execute [53336: 303] Long: 2147483647   
 Why do I get this to shorten the big double value in maximum value for maximum (32 bit) but when  literally  cut a positive Value returns  variable  casting negative value Gives Yon? In fact, I do not understand why the negative has returned back to everyone. Am I missing something like this with precision, perhaps?   
 
 
 Runtime code will result from a variable casting and the resultant overflow produces a maximum negative number (0x80000000 is an undetermined result, but what the runtime is doing). Constantly casting the compiler will change the number and it will be converted to the maximum positive number (0x7FFFFFFF).

Comments

Post a Comment

Popular posts from this blog

Java - Error: no suitable method found for add(int, java.lang.String) -

I'm in the middle of homework work and I'm stuck. At this point in my code, I think that I should have a GUI window that opens and allows me to type "inserted text number". Notice is not going anywhere but at this point, If I pass through the problem then it will be in a linked list. I am getting two of the same error for the lines. Add (index, element); And I can not seem to get past it, there is no suitable method for the error "add (int, java. string string)". Code is below, please advise. To clarify - this will not be a method error because it is a linked list. There should not be any way involved. import java.awt. *; Import java.awt.event. *; Import javax.swing. *; Import java.util. *; Import java.util.Scanner; Import java.util.LinkedList; Public class TopTenList JFrame {Private TopTenList tt; See the Private JTextArea list; Private JTextField cmdTextField; Private JTextField resultsTestfield; // This GUI window is the code for the public toptist...
Read more

java - JPA TypedQuery: Parameter value element did not match expected type -

I am using JPA 2.0 and getting the following code in the DAO layer: Public Zero Test () {string key = "status"; String [] Conditions = {"A", "B"}; & Lt; TestTable & gt; Results = Search (Keys, Conditions); } Public listing & lt; TestTable & gt; Search (string key, object value error) {string sql = "test ndf to testlet and jade nand." + Key + "in:" + key; TypedQuery & LT; TestTable & gt; Query = entityManager.createQuery (SQL, TestTable.class); Query.setParameter (key, Arrays.asList (valueArr)) / *** Error Line *** Return query.getResultList (); } In the above error line, it throws the following exception: java.lang.IllegalArgumentException: parameter value element [[Ljava.lang.String; @ cbe5bc] did not match the expected type [java.lang.String] Why is this expected type string while actually this string []? Please help! Note: This is derived from the normal routine and is a simplified code. I can no...
Read more

c++ - static template member variable has internal linkage but is not defined -

Yes, I know, there is a question with almost the same title, but it refers to a different situation. Error message) In my case, I have a .cpp file with a big named designation name (implementation details). There is a property class template with a static data member in that name space, which I need to access from outside the unknown namespace. I give it a little bit of meat: file.hpp namespace Bar {template & lt; Typename A & gt; Struct foo {static_assert (is_same & lt; a, float & gt; :: value} is_same & lt; a, double>: value, ""); Fixed zero set_static_var (a const & x); // ...}; } and file.cpp namespace {template & lt; Typename A & gt; Struct foo_traits {// supports the implementation of several static code bars: foo & lt; & Gt; Fixed A data; }; The template's & lt; & Gt; Float foo_traits & lt; Float & gt; :: datum; // No change if this is in the global namespace template & lt; & Gt; Doub...
Read more