Type conversion in C,

Type conversion in C,

Value types include integer, floating point, Boolean, String, DateTime, and Enum E (······)), structure type (Struct S (······))

 

Reference types include: string type, Class type (Object, Class C (·), interface type (Iterface I (······)), array type (one dimension and multi-dimensional array. Such as int [] and int [,])

 

The type conversion process is the packing and unpacking conversion process. The packing and unpacking conversion are specialized terms for type conversion. (Boxing conversion: implicit conversion of value type to reference type is allowed; reverse conversion of unpacking)

[Object class is the base class of all classes]

Basic type conversion:

1. automatic conversion (implicit conversion)

2. Forced conversion (display conversion)

3. Parse conversion (string value conversion)

 

Differences between automatic conversion and forced conversion:

 

1. Forced conversion can only be converted to the same type

 

2. automatic conversion can reference type conversion value type

 

[The value type can be converted to the reference type, but the reference type cannot be converted to the value type]

 

 

The automatic (implicit conversion) format is:

String s = "12.5 ";

Int t = Convert. ToDouble (s );

(Convert: data can be converted only when it meets the conditions of the type to be converted .)

 

Forced conversion (display conversion) format:

Double d = 23.6;

Int I = (int) d;

 

Parse conversion format:

String s = "3.14 ";

Float f = float. parse (s );

The brackets must be strings.

 

Additional packing and unpacking conversion:

Packing conversion:

Int I = 3;
String s = Convert. ToString (I );

 

Binning conversion:

String I = "3 ";
Double d = Convert. ToDouble (I );
Int s = (int) d;

 

In the C language, what is the symbol (->) and how to use it?

This is a symbol in the struct pointer. Write a program to explain it, for example:
# Include <stdio. h>
Struct STU // define a struct
{
Int num;
} Stu;
Int main ()
{
Struct STU * p; // defines a struct pointer.
P = stu; // p points to the struct variable stu.
Stu. num = 100; // attaches an initial value to the struct member num.
Printf ("% d", p-> num); // output the num value in stu
Return;
}
As you can see, the-> method is to reference the variable in the struct !!
Format: p-> struct member (such as p-> num)
The function is equivalent to stu. num or (* p). num.
I don't know. You don't understand, and don't understand call me. O (∩ _ ∩) O ~
Hope to adopt it.

In the C language, what is the symbol (->) and how to use it?

This is a symbol in the struct pointer. Write a program to explain it, for example:
# Include <stdio. h>
Struct STU // define a struct
{
Int num;
} Stu;
Int main ()
{
Struct STU * p; // defines a struct pointer.
P = stu; // p points to the struct variable stu.
Stu. num = 100; // attaches an initial value to the struct member num.
Printf ("% d", p-> num); // output the num value in stu
Return;
}
As you can see, the-> method is to reference the variable in the struct !!
Format: p-> struct member (such as p-> num)
The function is equivalent to stu. num or (* p). num.
I don't know. You don't understand, and don't understand call me. O (∩ _ ∩) O ~
Hope to adopt it.