define meaning of

Original link: Click to open the link C++/C macro definition (define) the Meaning of # # # The # # # in define is commonly used for stitching strings, but in the actual use of the process, there are some subtle differences, we have a few examples

The Meaning of # # # in C++/C macro definition (define)# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # define.#是字符串化的意思, the # that appears in the macro definition is a string that is followed by a parameter;eg#define STRCPY__

The difference between #define, const, typedef#define is not defining variables, it's just for text substitution.For example:#define PI 3.1415926float Angel;angel=30*pi/180;Then, when the program is compiled, the compiler will first "#define PI 3.141

Et define off override variable functionThe default "&" in Sql*plus represents an alternative variable, that is, Sql*plus will ask you to enter an alternate value whenever the symbol appears in the command. This means that you cannot enter a string

As a hard-pressed engineering student, "Signal and system" + "digital signal processing" is not the past, a variety of headache concepts and mathematical formula: Fourier variation, Laplace change, Z-transform, convolution, cyclic convolution,

Let's look at a few examples (1) struct{int x; int y;} Test1; Well, define the structure test1, test1.x and test1.y can be used in the statement. (2) struct test {int x; int y;} Test1; Well, define the structure test1, test1.x and test1.y can be

Jency LeeLinks: http://www.cnblogs.com/Jency/articles/C_Cplusplus_define.html1. Simple define Definition #define MaxTime + A simple maxtime is defined, which represents 1000 if you write in the program if (i Compiler replaces maxtime with 1000

The meaning of life, a very large and broad question, there is no definite answer. Everyone has a different view and understanding, 1000 readers there are 1000 of Hamlet. When you see this book, you must also be thinking about what is the meaning of

Difference between typedef and define   The following code is used to describe Typedef char * typedef_char;# Define define_char char * // No semicolon here Void main (INT argc, char * argv []){Char s [] = "ASDF ";Const typedef_char P = s; // char *

The Define () function defines a constant.define () functions: Defines a constant. Constants is much like variables, except for the following differences: constants [constant] and variables [variable] There are many similarities, so it is easy to