int and long

Original URL: http://www.cnblogs.com/kex1n/archive/2010/10/06/1844737.htmlThe type of data, in particular int, is different in length under the platform of different bits of machine. The C99 standard does not specify the length size of the specific

1. Integer PromotionIn an expression, any place where an int or unsigned int type can be used to do the right value can also use a signed or non - the char, short, and Bit-field symbols. If the value range of the original type can be represented by

Convert int and long to Char and string in QT   Convert Char to qstring Qstring Buf = qstring (qlatin1string (char); // convert Char to qstring Qstring value: Char Str. tostdstring (). c_str ()   For example, char tockenid [60]; Qstring STR = UI->

Getting startedFunction main function in variable C ++ Data Type C ++ operator C ++ array String Array string operation function C ++ is a powerful language that can be used for tasks that other languages cannot do. However, this powerful feature

C ++ data is nothing more than constants and variables. constants and variables have a storage structure in the computer. The program we write and the stored program data are stored in the computer memory in binary sequence. bit is a unit containing

Left shift operation: x X can be byte, short, Char, Int, and long basic types. N (displacement) can only be int type. Compiler execution steps: 1) if X is of the byte, short, and Char Types, It is upgraded to int; 2) If X is of the byte, short,

Nan is a constant value, indicating that an object is not a quantity. However, this value can only exist in values of double and float floating point variables. The following is a reprinted Article, which is probably sufficient to illustrate this

Data Model (lp32 ilp32 lp64 llp64 ilp64) The 32-bit environment involves the "ilp32" data model because the C data type is 32-bit int, long, and pointer. The 64-bit environment uses different data models. At this time, the long and pointer are

The use of int and long is confusing today. In C, the number of bytes of int and long is the same as that of the operating system pointer. However, in C language, the length of long is always greater than or equal to int. In objective-C, nsinteger

Today I will review the variables and basic types of C ++, and then look at the integer. Generally, the data type that represents an integer is called an integer, but in fact, an integer in C ++ includes an arithmetic type that represents an

There are eight basic data types in Java: Byte, short, Int, long, float, do le, Char, Boolean Integer Here, byte, short, Int, and long all represent integers, but their value ranges are different. The value range of byte is-128 ~ 127, occupies 1

1. [root @ linuxzgf ~] # GetconfLONG_BIT [root @ linuxzgf ~] # GetconfWORD_BIT (in 32-bit systems, the int and long types are generally 4 bytes, while in 64-bit systems, the int type is 4 bytes, however, long has been changed to 8 bytes available in

Click to open linkIn 32-bit, 64-bit systems, the only change is the length of the pointer; The 32-bit system is 4 bytes, 64 bits is 8 bytes. This refers to the bit width of the register, which is the so-called three-position . Results under

-The 1l type is long int, And the 1u type is unsigned Int. For comparison, there is an implicit type conversion. In C, when a variable is long int, if the value range of long int can cover unsigned int, the variable of unsigned int is converted to

10 simple Java performance optimizations and java performance optimizations Recently, the word "full domain (Web Scale)" has become popular, and people are also scaling their application architecture to make their systems more "full domain ". But

This article focuses on C ++ data types. C ++ Data Types in C ++ define how compilers store information in memory. In different development environments, you can assign any numeric type to a variable. The translator can allocate space based on the

Currently, the mainstream development language is C ++, but it does not feel as flexible as the C language. I would like to introduce the code implementation ControlTemplate method, the following is an example of C ++ code:

C ++ data types are used to store values. They have names and data types. The data types of variables determine how to store the bits representing these values in the computer's memory, the maximum length allowed by the variable name varies with the

A problem occurs in the group today. The problem is as follows: the first assignment is acceptable. Why is the second assignment unavailable? [cpp] int * x = NULL; int const * y = NULL; y = x; int ** z = 0; int const ** n = 0; n = z at the time I

Java simple data type-general Linux technology-Linux programming and kernel information. The following is a detailed description. Java defines eight simple (or basic) data types: byte, short, int, and long ), char, float, double, and boolean types