define int

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

Transferred from: http://paddy-w.iteye.com/blog/1403217In the Linux operating system using GCC programming, the current general processor is 32-bit word width, the following is the/usr/include/limit.h file on the Linux data type limitations and

Preface As for pointers, we first need to figure out four points: the pointer type, the pointer to the type, the value of the pointer, and the value the pointer points to. If this is not very clear, please refer to here URL:

Today with a few classmates see a function pointer definition:void (*f (int, void (*) (int))) (int)Previously seen in the C trap pit fails inside, but the article is described in detail, but often so that beginners do not grasp the focus, the result

#define是C语言中提供的宏定义命令, the main purpose is to provide programmers with certain convenience in programming, and to a certain extent, improve the efficiency of the program, but students often do not understand the nature of the command in learning,

See http://community.csdn.net/Expert/topic/3662/3662366.xml? Temp =. 1618006 there is a post about the excitement.The specific question is what is the macro function, # define macro1 (T, m) (INT) (void *) & (T *) 0-> m ). Is to get the offset of T

From: http://blog.csdn.net/linyaoxin/article/details/3160977 Const int * a, int const * a, int * const A, difference, pointer array, array pointer, declaration and definition Several confusing concepts are recorded hereI. ====== method declared in C

Definition: The # define Directive You can use the # define directive to give a meaningful name to a constant in your program. The two forms of the syntax are: Syntax # Define identifier token-stringopt # Define identifier [(identifieropt,...,

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

There are many places in the C language where macro definitions are used, such as in header files to prevent header files from being repeatedly included: #ifndef ctest_header_h #define CTEST_HEADER_H /header file content #endif Many macro