[C language]Handling 64-bit integers

Last update on October 3, 2009 07:56 AM by jak58
Published by netty5

[C language]Handling 64-bit integers






Basically in C language, an unsigned number over 32 bit can not exceed the value of 4 294 967 295.
It may happen that you are required to handle higher numbers and for this you need these numbers to be coded in 64 bit.

However, this may not be handled in the same way as an ordinary integer. The constants and the posting of these numbers must be defined differently.

Unsigned 64-bit integer


Type: unsigned long long
Formatting for display: % llu
Suffix to define a constant: ULL

Example:


//Assign the value in a 4294967296 
unsigned long long a= 4294967296ULL; 
//Show the value 
printf ( "% llu", a);

Signed 64-bit integer


Type: long long
Formatting for display: % lld
Suffix to define a constant: LL

Example:


//Assign the value in a 4294967296 
long long a= 4294967296LL; 
// Show the value 
printf ( "% lld", a); 



Using an unusual suffix to define a constant value

Unsigned long long a = 4294967296

Your compiler will prompt you that this number is too large for "long" typr. Ie a full 32 bits. The constants have such default. This concept is directly related to the architecture of 32-bit processors. A record 32-bit processor is limited and your default compiler will try to fit the numbers in one registry. But with a suffix such as LL and ULL, your compiler will store your number on 2 registers, i.e. on 64-bit, hence providing an optimized use.
Best answers for « Handling 64 bit integers » in :
Adobe Flash Player on Vista 64-bit Show Adobe Flash Player on Vista 64-bit Issue Solution Issue As you know, there’s any version of flash player available for Vista 64-bit platform. So you will not be able to watch streaming videos or access some websites. I guess you...
Converting a 32-bit integer into IP Show Converting a 32-bit integer into IP Number to convert: 3265917058 Binary representation 11000010 10101001 11110000 10000010 - 3265917058 00000000 00000000 00000000 11000010 - 3265917058 >> 24 ( 194 ) 11000010 10101001 11110000...
Determine which version of Windows, you are using [32 or 64 bits ShowDetermine which version of Windows, you are using [32 or 64 bits] Method 1 Method 2 Method 3 (Vista and 7) Want to know if your Windows is in 32 or 64 bit? Method 1 Start Run Enter command: winver Ok Look in the...
Compiling an assembly program with Nasm ShowCompiling an assembly program with Nasm Intro With LInux With Windows Intro Netwide Assembler (NASM) is an assembler and disassembler for the Intel x86 architecture and is commonly used to create 16-bit, 32-bit (IA-32) and 64-bit...
Compiling/testing in 32-bit on Ubuntu X86-64 ShowCompiling/testing in 32-bit on Ubuntu X86-64 If you want compile a source code for testing purpose or to use it as a 32-bit binary,the main problem is that the headers of the standard library are not suitable for this purpose and that a...
Download Intel® PROSet/Wireless for XP and Vista ShowIntel PROSet Wireless Intel is the driver necessary for handling wireless networks. The list of chipsets supported are: Intel ® WiFi Link 5100 Intel ® WiFi Link 5300 Intel ® Wireless WiFi Link 4965AGN Intel ® PRO / Wireless 3945ABG...
Download ATI Catalyst Software Suite for Vista (32 bit) ShowThe latest release for ATI drivers for windows Vista regrouping the following features and option: Catalyst Control Center Version 8.9 Radeon display driver 8.522 HydraVision WDM Driver Install Bundle Southbridge/IXP...
PCI Bus ShowThe PCI Bus The PCI bus (Peripheral Component Interconnect) was developed by Intel on 22 June 1992. Contrary to the VLB bus, it is not so much a traditional local bus but rather an intermediate bus located between the processor bus (NorthBridge)...
What is a computer bus? ShowIntroduction to the concept of a bus A bus, in computing, is a set of physical connections (cables, printed circuits, etc.) which can be shared by multiple hardware components in order to communicate with one another. The purpose of buses is to...
AGP bus ShowIntroduction to the AGP bus The AGP bus (short for Accelerated Graphics Port) was released in May 1997 for Slot One chipsets, then was later released for Super 7 chips in order to manage graphical data flow, which had grown to large to be...