Matrix Elements VB-800 Instrukcja Użytkownika Pobierz pdf (Strona 140)

132 Appendix A6 OxGauss Language Reference

type: one of

fn, keyword, matrix, proc, string

function-type: one of

fn, keyword, proc

A character matrix is a matrix where the elements holds strings rather than numeric

data. Since the underlying storage type is a double, the strings cannot be longer than 8

characters.

A string array is a vector or matrix of strings. For this type, there is no restriction

on the length of the strings stored in the array.

A6.4.1.1 Type conversion

When a double is converted to an int, the fractional part is discarded. For example,

conversion to int of 1.3 and 1.7 will be 1 on both occasions. When an int is converted

to a double, the nearest representation will be used.

A single element of a string (a character) is of type int. An int or double can be

assigned to a string element, which ﬁrst results in conversion to int, and then to a single

byte character.

A6.4.2 Lvalue

An lvalue is an object to which an assignment can be made.

A6.5 OxGauss Program

program:

external-statement-list

external-declaration-list

A OxGauss program consists of a sequence of statements and external declarations.

These either reserve storage for an object, or serve to inform of the existence of objects

created elsewhere. All statements at the external level make up the main section of the

program.

A6.6 External declarations

external-declaration-list:

external-declaration

external-declaration-list external-declaration

external-declaration:

declare-statement

external-statement

function-statement

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