constant expression

First: Array initial experienceWe often use containers in our lives, such as when we go to the supermarket to buy goods in a shopping bag. Also we need the container in the program, but the container is a little special, it is in the program is a

The compiler will replace the const variable with the corresponding value during the compilation process, in order to perform this substitution, the compiler must know the initial value of the variable. If the program contains multiple files, then

Compilation preprocessing is the initial step in the process of converting a C source program into an executable program. This step is done by the preprocessor (preprocessor). Before the source program is processed by the compiler, the preprocessor

C language-related pre-compilation instructions and compilation instructionsI. Content Overview This article mainly introduces the pre-compiled commands related to Conditional compilation in C language, including # define, # undef, # ifdef, # ifndef,

6th Chapter Function1. Local variables in the outermost scope of the function cannot use the same name as the function parameters because they belong to the same scope scope.2. The life cycle of a local static variable: initialized when the

1. Constant -- constant indicates a value that cannot be changedClassification of constants in Java:1, an integer constant. All integers2. Decimal constant. All decimal places3. boolean constants. It is special and has only two values. True False.4,

Enum TypeI. Scope of applicationAn enumeration type can be used to define a variable when it has only a few possible values. Ii. Rules of Use1. After the enumeration variable is established, the enumeration variable is assigned a value that requires

What is c++11 C++11 was once called c++0x, is the extension and revision of the current C + + language, c++11 not only contains the new functions of the core language, but also extends the standard library of C + + (STL), incorporating most of the

1. the header file is used for declaration instead of definition. Remember the differences between definitions and declarations when designing header files. The definition can appear only once, while the Declaration can appear multiple times

C/C ++ compilation system Compilation Program The process is preprocessing, compilation, and linking. A Preprocessor is a program that processes program source files according to pre-processing instructions before program source files are compiled.

C++primer 5th Edition Study notes (i)The first to second chapter of the heavy and difficult contentThis article mainly recorded my study C++primer (5th edition, Chinese version) encountered the heavy difficulties and analysis. Since the first to

In general, the initialization of static members of C + + classes is not difficult to understand, but refers to the "in-class initialization" of C + + static members that is confusing.Let's look at the following code:1 //example.h2#include 3#include

1, enter the file terminator in the Windows system method is CTRL + Z2, how to choose the type?1) Use a unsigned type when Youknow then the values cannot be negative2) use an int for integer arithmetic.short are usually too small and, in practice,

I. Overview of the ContentThis article mainly introduces the pre-compiling directives related to conditional compilation in C language, including # define, #undef, #ifdef, #ifndef, #if, #elif, #else, #endif, defined.Second, conditional

Brief introductionThe keyword static_assert is introduced in c++0x, which is used to make assertions during compilation, so it is called a static assertion.Its syntax is simple:static_assert(constant expression, hint-string).If the value of the

Switch statement The C language also provides another switch statement for multiple branch selections, in the general form of:switch (expression) {case constant Expression 1: statement 1;Case constant Expression 2: statement 2;...case constant

In the Java interview, I always like a few questions about the String object, such: 1. String s = new String ("abc"); several String objects are created. 2. String s1 = "abc ";String s2 = "";String s3 = s2 + "bc ";String s4 = "a" + "bc ";String s5 =

I. Two-D arraysDefinition of a two-dimensional array: Data type array name [constant expression 1][constant expression 2] = {value 1, value 2,.... Value n};For example:int Array[3][3] = {{1, 2, 3},{2, 1, 3},{3, 1, 2}};A two-dimensional array array[3]

Transferred from: http://www.cnblogs.com/lidabo/archive/2012/08/27/2658909.htmlthe process of compiling a program for C + + compiles is preprocessing, compiling, and linking. a preprocessor is a program that processes source files based on

C ++ Primer learning summary chapter 1 functions, Chapter 4 primerChapter 2 Functions 1. Local variables in the outermost scope of a function cannot use the same names as function parameters because they belong to the same scope.   2. lifecycle of