78IV datasheet(40/523 Pages) NEC

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CHAPTER 2 CONSTRUCTS OF C LANGUAGE

User’s Manual U15556EJ1V0UM

(2) Automatic storage duration

For objects that have automatic storage duration, an area is reserved when they enter a block to be declared.

If initialization is specified, the objects are initialized as they enter from the beginning of the block. In this case, if

any object enters the block by jumping to a label within the block, the object will not be initialized.

For objects that have automatic storage duration, the reserved area will not be guaranteed after the execution of

the declared block.

Objects that have automatic storage duration are as follows.

•

Objects that have no linkage

•

Objects declared inside a block without the storage class specifier static

2.3.5 Data types

A type determines the meaning of the value to be stored in each object.

Data types are divided into the following three categories depending on the variable to be declared.

•

Object type ................................................... Type that indicates an object with size information

•

Function type ................................................ Type that indicates a function

•

Incomplete type ............................................ Type that indicates an object without size information

•

Basic types

Integral types

char type

(Arithmetic types)

Signed

signed char

integral

short int

types

int

long int

Unsigned integral types

(specified by unsigned)

Enumeration type

Floating point types

float

double

long double

•

Character types

char

signed char

unsigned char

•

Incomplete types

Array with an indefinite object size, structure, union,

and void type

•

Derived types

Array type

Structure type

Union type

Function type

Pointer type

•

Scalar types

Basic (Arithmetic types)

Pointer type

Aggregate type

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