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ThinkPHP3.x constant sorting (pre-defined constant path constant system constant), thinkphp3.x constant. ThinkPHP3.x constant sorting (pre-defined constant path

The three nouns, though very raozui, are very accurate. The semantic analysis of Chinese language can easily separate the three conceptual areas.A) constant pointer.Constants are adjectives, pointers are nouns, and pointers are the center of a partial positive structure phrase. In this way, a constant pointer is essentially a pointer, and a constant modifies it,

1#include 2 3 intMain ()4 {5 intA = -;6 intb = -;7 8 /*9 * Constant pointer, can not modify point to addressTen * The value in the storage space, but you can modify the value pointing to the address One */ A int Const*P1 = A; - Const int*P2 = a;//constant Pointer - the /* - * Pointer constant, can not modify the address pointed to

Pointer to a constant, pointer constant, pointer constant to a constantThe first character is often called a constant pointer. They correspond to the following situations: const int * PI; or Int const * pi; int * const PI; const int * const PI; except for the letter pi, it is not easy to correctly write the "const", "*

(1) pointer to a constant: A pointer variable pointing to a constant. Const int * P = X; * P content cannot be modified, however, the pointer P can point to another address, which is the same as int const * P. (2) constant pointer: int * const P = X pointer itself is a constant, fixed to a variable, so P is not vari

PHP defines the array constant (array constant) method, array constant. PHP defines the array constant (array constant) method. in PHP, we cannot use const to directly define the array constant, but const can define the string

do not use too complex types, which will greatly reduce the readability of the program. Please use them with caution. The above types are enough for us to use. Now we will analyze the special: const char * pStr and char * const pStr. I do not know whether the following statements are correct. If you have better comments, please leave me a message indicating errors or deficiencies. Thank you very much! After reading the above information, I understand const char * pStr and char * const pStr in

PHP defines the array constant (array constant) method, array constant In PHP, we cannot use const to directly define array constants, but const can define string constants and use the eval () function to execute string constants. Therefore, we can return an array constant by defining a String

In C ++, constants are constants, such as int A = 5 and 5. So where does a constant exist? Is memory used? # Include Int;Main (void){A = 10;Cout Cout Cout Return 0;} The preceding section is from vc6.0.Code: The following message is displayed during compilation: Error c2101: '' on constant. That is, you cannot use the address operator for constants. This constant