logo
Tags down

shadow

How to convert a double to a string without using the CRT


By : Kjetil Tenold
Date : October 14 2020, 11:12 PM
should help you out Given that you state your question has no practical application, I figure you're trying to learn about floating point number representations.
Thus, if you're looking for a solution without using any library support, start with the format specification. From that you can discern the various "special" values (Infinity, NAN, etc) as well as decoding/calculating the actual numeric value. Once you have the significand and exponent, you know where to put the decimal point. You'll have to write your own itoa type routine. For radices which are a power of two, this can be as simple as a lookup table. For decimal, you'll have to do a little extra math.
code :


Share : facebook icon twitter icon

Convert string/char to double and following calculation with the double


By : Jaquera Johnson
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further First of all, since you are using c_str, your strings cannot be of type char*; most likely they are std::string.
In addition, you don't need to create a copy of your string: std::string str = msg->data is superfluous (even though it doesn't hurt).
code :
ROS_INFO("I am making calculation: [%f]", fmsg + 1);

Convert string to double and then double to string without losing precision


By : Gaurav Singhal
Date : March 29 2020, 07:55 AM
hop of those help? Someone had the same problem as you had. Simply set the precision of the std::ostringstream to your desired size and return it as std::string.
Here is a reference to an older question which shows the implementation:

convert object that holds a double to a string and then back to double


By : JeanB
Date : March 29 2020, 07:55 AM
To fix this issue I have a two Dimensional Object array (Object[][] data) that holds pairs of products-prices. , Try

Manually convert string to double java without using parse double


By : lmjnelson
Date : March 29 2020, 07:55 AM
hop of those help? You could split on the '.', then loop through the left side, grab the next char digit, if the existing value > 0, multiply it by 10, then add the read digit (use a switch/case). You would end up growing the number out to the left.
Then process the right side of the '.' by going right-to-left and doing the same thing, except this time divide by 10 and add digit/10. You will grow the decimal to the right.

In Java, how can I convert a string to a double (not Double)?


By : Nelson Ferreira
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Use Double#parseDouble.
As you can see the static method returns a primitive double and not an object Double:
Related Posts Related Posts :
  • intellisense for empty Win32 projects
  • Parsing mathematical functions of custom types
  • Android play raw Audio from C++ side
  • How to access Active Directory using C++Builder?
  • String statements
  • Instruction-Level-Parallelism Exploration
  • Select from SQLite with Qt
  • Dynamic Memory Allocation
  • Maximum number of characters in a string
  • Float Values as an index in an Array in C++
  • Is 'using namespace std;' a standard C++ function?
  • Building a suffix tree in C++
  • Passing ifstream to a function in C++
  • Where would you use a friend function vs. a static member function?
  • Invalid free while performing a std::string assign with -O2 set in g++
  • Shutting down multithreaded NSDocument
  • C(++) malloc confusion
  • Portable c++ atomic swap (Windows - GNU/Linux - MacOSX)
  • C++ array initialization
  • How (i.e. what tool to use) to monitior headers sent by Curl (Cookie problem)
  • Understanding the library functions in c++
  • C++, read and write to a binary file at the same time
  • strange result when calling SHFileOperation to delete file after install MS office2003
  • C++ multiple inheritance preventing diamond
  • How do you create a simple comment header template for all new classes in Visual C++ 2010?
  • Is it possible to use cin with Qt?
  • How to debug a strange memory leak (C++)
  • What is meant by Resource Acquisition is Initialization (RAII)?
  • How should I go about building a simple LR parser?
  • Is there any non-GPL-opensource C\C++ H264 encoding library?
  • return pointer to data declared in function
  • How can I determine the current exception in a catch (...) block?
  • Dependency difference between Release & Debug
  • Help with memory allocation for multiplayer game server
  • C++ malloc - dynamic array
  • c++ InterlockedExchangePointer and pointer alignment
  • Using SQLite with Qt
  • How to select against which version of the Visual C++ libraries the application is compiled?
  • How to access image Data from a RGB image (3channel image) in opencv
  • Adding default arguments to variadic macro
  • Any exit status without explicitly using return /exit
  • Using C++ types in an ANTLR-generated C parser
  • How to ignore false positive memory leaks from _CrtDumpMemoryLeaks?
  • how to use dll?
  • C++ string literal data type storage
  • How to get qmake to generate "project dependencies" in a Visual Studio .sln project
  • Why would someone use C instead of C++?
  • C ReadProcessMemory - how to examine the memory area associated with a process
  • how can I force C++ macro substitution at the time I choose in this case?
  • C++: What is the appropriate use for the std::logic_error exception?
  • Is there a working C++ grammar file for ANTLR?
  • Copy Constructor?
  • How to start a voice quality PESQ test?
  • I'm trying to change my Maze traversal recursive coding part into a while loop
  • Providing less than operator for one element of a pair
  • Question about exact time of destruction of temporaries in C++
  • Please suggest some algorithm to find the node in a tree whose distance to its farthest node is minimum among all the no
  • Best practices with object manager
  • Using input to call a member function
  • How to find out if a character in a string is an integer
  • shadow
    Privacy Policy - Terms - Contact Us © bighow.org