AN3350 datasheet(95/185 Pages) STMICROELECTRONICS

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AN3350

C compiler

Doc ID 018512 Rev 2

95/185

and continues until the end of a source code line.

A C-style comment begins with

ends with

and may span more than one line.

12.2.11

C++-style digraphs

When the C99 extensions setting is on, the compiler recognizes C++-style two-character

combinations that represent single-character punctuation. Table 15 lists these digraphs.

12.2.12

Empty arrays in structures

When the C99 extensions setting is on, the compiler allows an empty array to be the last

member in a structure definition. Example 32 shows an example.

Example 32 Example of an empty array as the last struct member

struct {

int r;

char arr[];

} s;

12.2.13

Hexadecimal floating-point constants

Precise representations of constants specified in hexadecimal notation to ensure an

accurate constant is generated across compilers and on different hosts. The compiler

generates a warning message when the mantissa is more precise than the host floating

point format. The compiler generates an error message if the exponent is too wide for the

host float format.

Examples:

0x2f.3a2p3

0xEp1f

Table 15.

C++-style digraphs

This digraph

is equivalent to this character

[

]

{

}

%:%:

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