macros for dummies

commonly used strings , common basic variable definition macros ConstApple has always recommended that we use a const instead of a macro Const Effect : 1. modifier right basic variable or pointer variable int a int *p 2. the const modifier variable is read-only Modifying basic variables//int Const A = 3;//Const int a = 3; int * const p; //P: read-only *p: variable int const * p1; //p1: variable *p1: Read Only const int * p2; //P2:

, y = 4 },{X = 0, y = 4}} -- Print the colorPrint (myPolygon ["color"]) -- Print it again using dot-- NotationPrint (myPolygon. color) -- The points are accessible-- In myPolygon [1] to myPolygon [4] -- Print the second point's x-- CoordinatePrint (myPolygon [2]. x) Program descriptionFirst, create a table. Different from the previous example, In the constructor of the table, there are {x = 0, y = 0 },What does this mean? This is actually a small table, defined in the big table, the small tableT

This article tests three compilers, namely VC, mingw, and GCC, in 32-bit and 64-bit modes. In six cases, the predefined macro values related to 64-bit programming are used. It is of reference significance for cross-platform programming. Agner fog mentioned some reservation Macros in his calling conventions for different C ++ compilers and operating systems. The following is an excerpt. Note: The following content is from calling conventions for diffe

Preface: If you are familiar with C language, you should be familiar with macros. macros are often used in C language programming. The main purpose of using macros is to facilitate programming for programmers, in addition, the program efficiency can be improved to a certain extent. The macro definition command in C language is # define. The following are some sma

Preface: If you are familiar with C language, you should be familiar with macros. macros are often used in C language programming. The main purpose of using macros is to facilitate programming for programmers, in addition, the program efficiency can be improved to a certain extent. The macro definition command in C language is # define. The following are some sm

This article tests three compilers, namely VC, mingw, and GCC, in 32-bit and 64-bit modes. In six cases, the predefined macro values related to 64-bit programming are used. It is of reference significance for cross-platform programming. Agner fog mentioned some reservation Macros in his calling conventions for different C ++ compilers and operating systems. The following is an excerpt. Note: The following content is from calling conventions for diffe

------ ManyProgramThe clerk does not know what the "macro" in C really means? In particular, macros and functions are often confused when they have parameters. Here I want to talk about "macros". macros are just a definition. They define a statement block. When the program is compiled, the compiler must first execute an action to replace the source program and

In the usual use of Word, you will always encounter the need to repeat the same content situation, when users can use the macro function to simplify a series of operations, thereby improving the efficiency of the instrument processing. A macro is a well-defined operation, a collection of instructions, or a piece of program code. A macro is actually a series of commands and functions stored in a Visual Basic module that can be run at any time when it needs to be performed. Creating autorun

C ++ macros and enumeration, enumerationMacro Our calculator program uses 1234 for addition, subtraction, multiplication, and division, which makes reading a little difficult. After a month, you may not be able to remember whether the code is 0123 or 1234. You still have to search for it in the Code. If you can get a meaningful alias for the four numbers representing the four arithmetic operations, first, you know what it is. No problem. Use

"Hot Questions-Extended learning" Inline constenum macros "C + + can use technology to replace macros"The inline of C + + is an improvement to the C function macro, the const substitution macro constants.inline overrides are provided for function macro C + +. try to replace the macro with a const, Enum,inline. --"Effective C + +" clause 2Advantages of macros