By Erik Wischnewski

Mit diesem Buch wird Ihnen als Pascal-Einsteiger eine Hilfe an die Hand gegeben, mit der Sie Ihre ersten Anwendungen programmieren können. Aber auch als fortgeschrittener Anwender werden Sie zahlreiche information und methods finden, auf die Sie schon lange gewartet haben. Sie werden erstaunt sein, wieviel Ihnen geboten wird. Insgesamt finden Sie nicht nur - wie im Titel versprochen - a hundred, sondern sogar 103 wertvolle Rezepte für TurboPascal zusammengetragen. Jedes Rezept enthält außer einer nützlichen Prozedur oder Funktion auch ein inter­ essantes Anwendungsbeispiel, wie etwa trigonometrische Berechnungen, Umrechnungen von Temperaturen oder U-Boot versenken. Jedes Rezept bringt Ihnen einen vollen Lernerfolg. Sie werden nach wenigen Minuten bereits Ihre ersten Programme geschrieben haben. Sie können die Rezepte direkt als Bibliothek übernehmen oder auf Ihnen aufbauend eigene Anwendungen daraus gestalten. Zur Erhaltung der Übersicht wird nur das Wesentliche als Programmcode wiedergegeben. Im fortgeschrittenen Stadium gehen Programmierer im allgemeinen dazu über, möglicherweise auftretende Fehler abzufangen und zu bearbeiten. In diesem Büchlein wird bewußt darauf verzichtet, da anderenfalls der Umfang dreimal so groß geworden wäre. Es gibt nur wenige Ausnahmen, bei denen neben einer gekürzten model auch eine kompliziertere Vollversion als Rezept zu finden ist. Sollten Sie keine Lust haben, die zahlreichen advice und ProgrammbeispieIe seIbst einzutippen, können Sie den gesamten Quellcode dieses Buches in lauffähiger shape (Units und Programme) bei mir für 29.80 DM erwerben (Heinrich-Heine-Weg thirteen, W- 2358 Kaltenkirchen).

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Extra resources for 100 Rezepte für Turbo Pascal: Programmiertips mit Pfiff für Einsteiger und Fortgeschrittene

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Wird als Richtung U übergeben, dann wird aufwärts gerollt, bei D abwärts. ~ PROCEOURE Rollen (XO,YO: Xl, Yl: Richtung: VAR 5,Z: Byte; P: Word; Byte; Byte; Char); Laufindex für 5palte und Zeile Position im Bildschirmspeicher BEGIN CA5E Richtung OF 'U': BEGIN FOR Z := YO TO Yl 00 FOR 5 := XO TO Xl 00 BEGIN P := (Z-1)*160 + (5-1)*2; Mem [5egMon:P-160) := Mem Mem [5egMon:P-160+l) := Mem END; FOR 5 := XO TO Xl 00 BEGIN P := (Y1-1)*160 + (5-1)*2; Mem [5egMon:P) := 32; END; END; ' 0 ' : BEGIN FOR Z := Yl OOWNTO YO 00 FOR 5 := XO TO Xl DO BEGIN P := (Z-1)*160 + (5-1)*2; Mem [5egMon:P+160) := Mem Mem [5egMon:P+160+1) := Mem END; FOR 5 := XO TO Xl 00 BEGIN P := (YO-l)*160 + (5-1)*2; Mem [5egMon:P) := 32; END; END; END; END; ~ 4-J' { up aufwärts } [5egMon:P); [5egMon:P+l); { down abwärts } [5egMon:P); [5egMon:P+l); Lassen Sie eine Zeile von oben nach unten »rutschen und zurück.

4 Implementation der Graphiktreiber 58 Dieses Unit implementiert die als OBJ-Datei vorliegenden Graphiktreiber und Schriftfonts. Dadurch müssen Sie bei Graphikprogrammen die BGI-Dateien nicht mitliefern, wenn Sie Ihre TurboPascal-Programme an andere weitergeben wollen. ~ UNIT Graphik; INTERFACE USES Dos,Crt,Graph; PROCEDURE HereulesTreiber; PROCEDURE EGAVGATreiber; PROCEDURE Kleinschrift; IMPLEKENTATION PROCEDURE HerculesTreiber; PROCEDURE EGAVGATreiber; PROCEDURE Kleinschrift; {$L HERC } {$L EGAVGA } {$L LITT } EXTERNAL; EXTERNAL; EXTERNAL; BEGIN IF (RegisterBGIDriver (@HerculesTreiber) < (RegisterBGIDriver (@EGAVGATreiber) < (RegisterBGIFont (@Kleinschrift) < THEN FehlerMeldung ( ' Graphiktreiber-Fehler END.

Der Treiber wird oftmals auch Expanded Memory Manager (EMM) genannt. ~ FUNCTION EMSInstalled: Baalean; VAR Reg: Registers; I: Byte; DeviceName: STRING [8]; BEGIN WITH Reg 00 BEGIN OeviceName := AB := 53; AL := 103; MSDOS (Reg); FOR I := 0 TO 7 00 OeviceName := OeviceName + Chr (Mem [ES:10+I]); EMSInstalled := (OeviceName = 'EMMXXXXO'); ENO; END; 4/- 1!! Wenn Sie wissen möchten, ob ein EMS-Treiber installiert ist, können Sie folgendes Programm erstellen und jederzeit als EXE starten. 7) in einem Unit namens EMS einschließlich der benötigten Variablen verstaut haben.

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