References, fields, properties, constructors in C #

One , the difference between the reference assignment and the ordinary assignment value

Pointers are not completely discarded in C #, pointers are called references in C #, they are similar but not exactly, and their use of pointers is as follows:

(same color note contrast)

In the C language:

INTR*P1,*P2;

int a=10,b=20;

p1=&a;

p2=&b;

P2=P1;

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In C #:

Class Person

{

int age;

String name;

}

Person p1,p2;//(similar to CHAR*P1,*P2;) After this expression executes, the system simply allocates two addresses to hold the two class variable names, and does not allocate space of length int+string size

p1= new Person ();

p1.age= Ten; After this two-type execution the system allocates memory to store p1.age and P1.name values, while P1 points to this memory space

p1.name= "WWE";//(at this point the equivalent of int a=10,b=20;p1=&a;p2=&b;)

p2= p1;//p2 and P1 point to the same memory space (corresponding to P2=P1 in C)

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Ii. fields, Attributes

Class Person

{

int age;//field (just a normal variable)

int age//Property (essentially a function that is used to manipulate fields)

{

Get{return age;}

set { age=value;}

}

Third, the constructor function

Class Person

{

int age;//field (just a normal variable)

Public person ()//essence is a function, but there is no return value , the name is the class name , used to initialize the object, that is, to do the assignment of the field, pay attention to the comparison with the attributes of their similarities and differences

{

age=10;

}

References, fields, properties, constructors in C #