Íà ãëàâíóþ

Ïðîãðàììèðîâàíèå íà ÿçûêå âûñîêîãî óðîâíÿ. Turbo Pascal

Ïðåäñòàâëåíû ñîâðåìåííûå ìåòîäû è ñðåäñòâà ðàçðàáîòêè àëãîðèòìîâ è ïðîãðàìì, ïðèåìû ñòðóêòóðíîãî ïðîãðàììèðîâàíèÿ, îïðåäåëåíû õàðàêòåðèñòèêè êà÷åñòâà ïðîãðàììíîãî ïðîäóêòà, ñïîñîáû çàïèñè àëãîðèòìà íà ÿçûêå âûñîêîãî óðîâíÿ, áîëüøîå âíèìàíèå óäåëåíî îòëàäêå ïðîãðàìì. Èçó÷åíèå âåäåòñÿ íà êîíêðåòíûõ ïðèìåðàõ è ñîïðîâîæäàåòñÿ ñîîòâåòñòâóþùèìè òåìå êîíñòðóêöèÿìè ÿçûêà Pascal ñ ó÷åòîì îñîáåííîñòåé ñèñòåìû Turbo Pascal 7.0. Ïðàêòè÷åñêè ê êàæäîé ãëàâå äàíû êîíòðîëüíûå âîïðîñû è çàäàíèÿ äëÿ ñàìîïðîâåðêè. Ïðèâåäåíû ìåòîäè÷åñêèå ðåêîìåíäàöèè äëÿ âûïîëíåíèÿ êóðñîâîé ðàáîòû è åå òèïîâîé ïðèìåð. Ïîëíîå ñîäåðæàíèå Îãëàâëåíèå Ïðåäèñëîâèå                                                                            1 Ââåäåíèå                                                                                                  3 Ãëàâà 1. Îñíîâíûå ïðèíöèïû ðàçðàáîòêè àëãîðèòìîâ è ïðîãðàìì    5 1.1. Ýòàïû ðåøåíèÿ çàäà÷ íà ÝÂÌ                                                                5 1.1.1. Ïîñòàíîâêà çàäà÷è                                                                            6 1.1.2. Ôîðìàëèçàöèÿ èëè ìàòåìàòè÷åñêàÿ ïîñòàíîâêà çàäà÷è                          7 1.1.3. Âûáîð èëè ðàçðàáîòêà ìåòîäà ðåøåíèÿ                                                7 1.1.4. Ðàçðàáîòêà àëãîðèòìà                                                                        8 1.1.5. Ïðîãðàììèðîâàíèå                                                                            9 1.1.6. Îòëàäêà                                                                                           9 1.1.7. Âû÷èñëåíèå è îáðàáîòêà ðåçóëüòàòîâ                                                  12 1.2. Ôîðìû çàïèñè àëãîðèòìîâ                                                                     12 1.2.1. Ñëîâåñíîå îïèñàíèå                                                                          13 1.2.2. Çàïèñü àëãîðèòìà ñ ïîìîùüþ ñõåì                                                      13 1.2.3. Ïñåâäîêîäû                                                                                      17 1.2.4. Ñïîñîá çàïèñè íà ÿçûêå ïðîãðàììèðîâàíèÿ                                          18 1.3. Ñâîéñòâà àëãîðèòìîâ                                                                           19 1.4. Êà÷åñòâî ïðîãðàììíîãî ïðîäóêòà                                                           21 1.5. Îñíîâû òåõíîëîãèè ïðîãðàììèðîâàíèÿ                                                    24 1.5.1. Ñïîñîáû ïðîåêòèðîâàíèÿ àëãîðèòìîâ è ïðîãðàìì                                  25 1.5.2. Îñíîâíûå èäåè ñòðóêòóðíîãî ïðîãðàììèðîâàíèÿ                                   27 1.5.3. Ñòðóêòóðîãðàììû                                                                              35 1.5.4. Ðåêîìåíäàöèè ðàçðàáîò÷èêó ïðîãðàìì                                                 38 1.6. Âîïðîñû äëÿ ñàìîêîíòðîëÿ                                                                   40 Ãëàâà 2. Ââåäåíèå â àëãîðèòìè÷åñêèé ÿçûê Turbo Pascal         41 2.1. Õàðàêòåðèñòèêà ÿçûêà Ïàñêàëü                                                             41 2.2. Turbo Pascal                                                                                        43 2.2.1. Èñòîðè÷åñêàÿ ñïðàâêà                                                                       43 2.2.2. Ïàêåò Turbo Pascal 7.0                                                                       44 2.3. Àëôàâèò ÿçûêà                                                                                    45 2.3.1. Èäåíòèôèêàòîðû                                                                               46 2.3.2. Ðàçäåëèòåëè                                                                                     46 2.3.3. Ñïåöèàëüíûå ñèìâîëû                                                                        47 2.4. Ñòðóêòóðà ïðîãðàììû                                                                           48 2.4.1. Îáúÿâëåíèÿ                                                                                      48 2.4.2. Ñòðóêòóðà ïðîãðàììû â ÒР                                                                49 2.5. Òèïû äàííûõ                                                                                       50 2.5.1. Öåëûé òèï                                                                                        52 2.5.2. Âåùåñòâåííûå òèïû                                                                           53 2.5.3. Ñèìâîëüíûé òèï                                                                                56 2.5.4. Ëîãè÷åñêèé òèï                                                                                 59 2.6. Ðàçäåë îáúÿâëåíèé                                                                              60 2.6.1. Îáúÿâëåíèå ìåòîê                                                                             60 2.6.2. Îáúÿâëåíèå êîíñòàíò                                                                        60 2.6.3. Îáúÿâëåíèå ïåðåìåííûõ                                                                     62 2.7. Âûðàæåíèÿ                                                                                          63 2.7.1. Îïåðàöèè                                                                                         63 Àðèôìåòè÷åñêèå îïåðàöèè                                                                          63 Ëîãè÷åñêèå îïåðàöèè                                                                                 64 Îïåðàöèè ñ áèòàìè                                                                                    65 Îòíîøåíèÿ                                                                                                66 2.7.2. Ïîðÿäîê âû÷èñëåíèÿ àðèôìåòè÷åñêèõ è ëîãè÷åñêèõ âûðàæåíèé               66 2.8. Ñòàíäàðòíûå ôóíêöèè                                                                          68 2.8.1. Àðèôìåòè÷åñêèå ôóíêöèè                                                                  69 2.8.2. Ëîãè÷åñêèå è ñèìâîëüíûå ôóíêöèè                                                     70 2.9. Âîïðîñû äëÿ ñàìîêîíòðîëÿ                                                                   71 Ãëàâà 3. Îïåðàòîðû                                                               73 3.1. Ïðîñòûå îïåðàòîðû                                                                              73 3.1.1. Îïåðàòîð ïðèñâàèâàíèÿ                                                                     74 3.1.2. Ïóñòîé îïåðàòîð                                                                               76 3.1.3. Îïåðàòîð áåçóñëîâíîãî ïåðåõîäà                                                        77 3.2. Ñòðóêòóðíûå îïåðàòîðû                                                                        78 3.2.1. Ñîñòàâíîé îïåðàòîð                                                                          78 3.2.2. Óñëîâíûé îïåðàòîð if                                                                         79 3.2.3. Îïåðàòîð âûáîðà                                                                              81 3.2.4. Ââîä è âûâîä äàííûõ                                                                         87 Ââîä äàííûõ                                                                                              87 Âûâîä äàííûõ                                                                                            88 3.2.5. Îïåðàòîðû öèêëîâ                                                                             91 Îïåðàòîð öèêëà ñ ïàðàìåòðîì                                                                     92 Îïåðàòîð öèêëà ñ ïðåäóñëîâèåì                                                                  98 Îïåðàòîð öèêëà ñ ïîñòóñëîâèåì                                                                  104 3.2.6. Ïðèìåðû ïðîãðàìì ñ èñïîëüçîâàíèåì öèêëè÷åñêèõ ñòðóêòóð                   107 Èòåðàöèîííûå öèêëû                                                                                  107 Âëîæåííûå öèêëû                                                                                      112 3.3. Âîïðîñû äëÿ ñàìîêîíòðîëÿ                                                                   125 Ãëàâà 4. Êîíñòðóèðîâàíèå è ïðåîáðàçîâàíèå òèïîâ äàííûõ    127 4.1. Îïèñàíèå òèïà                                                                                    127 4.2. Ïðåîáðàçîâàíèå òèïîâ äàííûõ                                                               128 4.2.1. Íåÿâíûå ïðåîáðàçîâàíèÿ                                                                   128 4.2.2. Ïðåîáðàçîâàíèå òèïîâ ñ ïîìîùüþ ôóíêöèé                                          129 4.2.3. ßâíûå ïðåîáðàçîâàíèÿ                                                                       129 4.3. Ïåðå÷èñëÿåìûé òèï äàííûõ                                                                   131 4.4. Îãðàíè÷åííûé òèï äàííûõ                                                                     136 4.5. Ñòðóêòóðèðîâàííûå òèïû. Ìàññèâû                                                        138 4.5.1. Îäíîìåðíûå ìàññèâû                                                                         139 4.5.2. Îïðåäåëåíèå äâóìåðíîãî ìàññèâà â Turbo Pascal                                  149 4.5.3. Ìàññèâ ñèìâîëîâ                                                                              162 4.5.4. Îøèáêè èñïîëüçîâàíèÿ ðåãóëÿðíîãî òèïà äàííûõ                                   163 4.6. Âîïðîñû äëÿ ñàìîêîíòðîëÿ                                                                   164 Ãëàâà 5. Ïðîöåäóðû è ôóíêöèè                                             165 5.1. Ëîêàëüíûå è ãëîáàëüíûå èìåíà                                                              168 5.2. Ïðîöåäóðû                                                                                          169 5.3. Ïàðàìåòðû                                                                                          174 5.3.1. Ïàðàìåòðû-çíà÷åíèÿ                                                                         175 5.3.2. Ïàðàìåòðû-ïåðåìåííûå                                                                      175 5.3.3. Ïàðàìåòðû-êîíñòàíòû                                                                        176 5.3.4. Ïàðàìåòðû áåç òèïà                                                                           177 5.4. Ôóíêöèè                                                                                             180 5.5. Ðåêóðñèÿ â Turbo Pascal                                                                       186 5.6. Äîïîëíèòåëüíûå òèïû ïîäïðîãðàìì                                                        192 5.6.1. Âíåøíÿÿ ïîäïðîãðàììà                                                                      192 5.6.2. Âñòðîåííûé àññåìáëåð                                                                       193 5.6.3. Ïîäïðîãðàììû, èìåþùèå òåëà â ìàøèííîì êîäå                                    195 5.6.4. Ïðîöåäóðû îáðàáîòêè ïðåðûâàíèé                                                       195 5.7. Ìàññèâû îòêðûòîãî òèïà                                                                       196 5.8. Ïðîöåäóðíûé òèï                                                                                 198 5.9. Ïðèìåðû ïîäïðîãðàìì                                                                          201 5.10. Âîïðîñû äëÿ ñàìîêîíòðîëÿ                                                                  220 Ãëàâà 6. Ñòðóêòóðèðîâàííûå òèïû                                         221 6.1. Ñòàíäàðòíûé òèï string                                                                         221 6.2. Ðàñøèðåííûå âîçìîæíîñòè ðàáîòû ñî ñòðîêàìè                                       229 6.2.1. ASCIIZ-ñòðîêè                                                                                  229 6.2.2. Ïðåäîïðåäåëåííûé òèï PChar                                                              229 6.2.3. Ñòàíäàðòíûé ìîäóëü Strings                                                                231 Äèíàìè÷åñêîå ñîçäàíèå è óíè÷òîæåíèå ñòðîê                                               231 Êîïèðîâàíèå ñòðîê                                                                                     232 Êîíêàòåíàöèÿ ñòðîê                                                                                   233 Ñðàâíåíèå ñòðîê                                                                                        234 Äîïîëíèòåëüíûå ôóíêöèè ðàáîòû ñî ñòðîêàìè                                               234 6.3. Ìíîæåñòâåííûé òèï äàííûõ                                                                   236 6.4. Êîìáèíèðîâàííûé òèï äàííûõ                                                                243 6.5. Ôàéëîâûé òèï äàííûõ                                                                           252 6.5.1. Ôàéëû è äîñòóï ê íèì                                                                        253 6.5.2. Ïîäãîòîâêà ôàéëîâ ê ðàáîòå è åå çàâåðøåíèå                                      254 6.5.3. Îïåðàöèè ââîäà/âûâîäà                                                                     255 6.5.4. Îïåðàöèè, ïîçâîëÿþùèå ïåðåìåùàòüñÿ ïî ôàéëó                                 255 6.5.5. Ïðî÷èå ïðîöåäóðû è ôóíêöèè äëÿ ðàáîòû ñ ôàéëàìè ëþáîãî âèäà           256 6.5.6. Òåêñòîâûå ôàéëû                                                                              262 6.5.7. Ñòàíäàðòíûå òåêñòîâûå ôàéëû                                                            264 6.5.8. Ôàéëû áåç òèïà                                                                                 265 6.6. Âîïðîñû äëÿ ñàìîêîíòðîëÿ                                                                   268 Ãëàâà 7. Ñòðóêòóðèðîâàíèå ïðîãðàìì                                     269 7.1. Îðãàíèçàöèÿ è èñïîëüçîâàíèå ìîäóëåé                                                   269 7.1.1. Ðàçäåë interface                                                                                272 7.1.2. Ðàçäåë implementation                                                                        274 7.1.3. Ðàçäåë èíèöèàëèçàöèè                                                                       275 7.1.4. Ñîâìåñòíîå èñïîëüçîâàíèå ìîäóëåé                                                    281 7.1.5. Êîìïèëÿöèÿ ìîäóëåé                                                                         284 7.1.6. Ñòàíäàðòíûå ìîäóëè                                                                          286 7.2. Îâåðëåé                                                                                             288 7.2.1. Îñîáåííîñòè èñïîëüçîâàíèÿ îâåðëåÿ                                                   289 7.2.2. Îðãàíèçàöèÿ è èñïîëüçîâàíèå îâåðëåÿ â ÒР                                        290 7.2.3. Ìîäóëü Overlay                                                                                 291 7.3. Âîïðîñû äëÿ ñàìîêîíòðîëÿ                                                                   295 Ãëàâà 8. Ññûëî÷íûå òèïû. Äèíàìè÷åñêèå îáúåêòû ñëîæíîé ñòðóêòóðû     297 8.1. Äèíàìè÷åñêèå îáúåêòû è ññûëêè                                                           298 8.1.1. Ñòàíäàðòíûå ñðåäñòâà ðàáîòû ñ óêàçàòåëÿìè                                       300 8.1.2. Äåéñòâèÿ íàä ññûëêàìè                                                                     302 Ïðèñâàèâàíèå                                                                                            302 Ñðàâíåíèå ññûëîê                                                                                      303 Óíè÷òîæåíèå äèíàìè÷åñêèõ îáúåêòîâ                                                           304 8.1.3. Àäìèíèñòðàòîð êó÷è                                                                          304 8.1.4. Ñòàíäàðòíûå ïðîöåäóðû è ôóíêöèè                                                     307 8.2. Äèíàìè÷åñêèå ñòðóêòóðû äàííûõ                                                           309 8.2.1. Ñòåê                                                                                                309 Íà÷àëüíîå ôîðìèðîâàíèå ñòåêà                                                                   310 Äîáàâëåíèå êîìïîíåíòà â ñòåê                                                                    310 Âûáîðêà êîìïîíåíòîâ èç ñòåêà                                                                    311 8.2.2. Î÷åðåäü                                                                                           314 Íà÷àëüíîå ôîðìèðîâàíèå î÷åðåäè                                                               315 Äîáàâëåíèå êîìïîíåíòà â î÷åðåäü                                                               316 Âûáîðêà êîìïîíåíòà èç î÷åðåäè                                                                  317 8.2.3. Ñïèñêè                                                                                            319 Íà÷àëüíîå ôîðìèðîâàíèå ñïèñêà è äîáàâëåíèå êîìïîíåíòà â êîíåö ñïèñêà      320 ×òåíèå è âñòàâêà êîìïîíåíòà ïî êëþ÷ó                                                        321 8.2.4. Äâóíàïðàâëåííûå ñïèñêè                                                                   329 Âñòàâêà ýëåìåíòà                                                                                      330 Óäàëåíèå ýëåìåíòà                                                                                    331 Ïîèñê ýëåìåíòà                                                                                         331 8.2.5. Äâîè÷íîå äåðåâî                                                                              332 Ïîèñê âåðøèíû â äåðåâå                                                                             333 Âêëþ÷åíèå çâåíà â äåðåâî                                                                          334 Óäàëåíèå çâåíà èç äåðåâà                                                                           336 8.3. Âîïðîñû äëÿ ñàìîêîíòðîëÿ                                                                   337 ÏÐÈËÎÆÅÍÈß                                                                                            339 Ïðèëîæåíèå 1. Ñèñòåìà ïðîãðàììèðîâàíèÿ ÒÐ 7.0                                          341 Ï1.1. Èíòåãðèðîâàííàÿ ñðåäà ðàçðàáîòêè Turbo Pascal 7.0                               341 Ï1.1.1. Çàïóñê è âûõîä                                                                               341 Ï1.1.2. Êîìïîíåíòû                                                                                    342 Ïîëîñà ìåíþ è ïîäìåíþ                                                                             342 Ñòðîêà ñòàòóñà è íåêîòîðûå ôóíêöèîíàëüíûå êëàâèøè                                   344 Îêíî ðåäàêòèðîâàíèÿ                                                                                 345 Ï1.1.3. Ðàáîòà â ñòðîêå ìåíþ                                                                      346 Ìåíþ File                                                                                                  346 Ìåíþ Edit                                                                                                 350 Ìåíþ Search                                                                                             352 Ìåíþ Run                                                                                                  355 Ìåíþ Compile                                                                                            356 Ìåíþ Debug                                                                                              358 Ìåíþ Tools                                                                                               358 Ìåíþ Options                                                                                            359 Ìåíþ Window                                                                                            359 Ìåíþ Help                                                                                                 360 Ïðèëîæåíèå 2. Îòëàäêà ïðîãðàìì â Turbo Pascal 7.0                                       364 Ï2.1. Îáùèå âîïðîñû îòëàäêè ïðîãðàìì                                                        364 Ï2.1.1. Êëàññèôèêàöèÿ îøèáîê                                                                    365 Ï2.1.2. Êàê ïèñàòü ïðîãðàììû äëÿ îòëàäêè?                                                   366 Ï2.2. Ïðîöåññ îòëàäêè ïðîãðàìì                                                                  367 Ï2.2.1. Ñëó÷àè, êîãäà îòëàäêà íåâîçìîæíà                                                   367 Ï2.2.2. Îáðàáîòêà îøèáîê                                                                           369 Êîíòðîëü îøèáîê ââîäà/âûâîäà                                                                   369 Êîíòðîëü íà ïðèíàäëåæíîñòü äîïóñòèìîìó äèàïàçîíó                                     370 Ï2.2.3. Äðóãèå âîçìîæíîñòè îáðàáîòêè îøèáîê                                             372 Ï2.2.4. ×òî ìîæåò äåëàòü îòëàä÷èê?                                                             372 Ï2.2.5. Îáçîð âîçìîæíîñòåé îòëàä÷èêà                                                        373 Òðàññèðîâêà                                                                                             373 Ïåðåõîä íà êóðñîð                                                                                     373 Òî÷êè îñòàíîâà                                                                                         373 Ïðîñìîòð                                                                                                  374 Âû÷èñëåíèå èëè ìîäèôèêàöèÿ                                                                     374 Ïîèñê                                                                                                       374 Ï2.2.6. Ïîäãîòîâêà ê èñïîëüçîâàíèþ îòëàä÷èêà                                             374 Ï2.2.7. Íà÷àëî ñåàíñà îòëàäêè                                                                    376 Ï2.2.8. Ðåñòàðò ñåàíñà îòëàäêè                                                                   376 Ï2.2.9. Îêîí÷àíèå ñåàíñà îòëàäêè                                                               377 Ï2.3. Ïðèìåðû ñåàíñîâ îòëàäêè                                                                   377 Ï2.3.1. Òðàññèðîâêà ïðîãðàììû                                                                   377 Ï2.3.2. Ïîøàãîâîå âûïîëíåíèå ïðîãðàììû                                                     379 Ï2.3.3. Èñïîëüçîâàíèå òî÷åê îñòàíîâà                                                         381 Ï2.3.4. Èñïîëüçîâàíèå êîìáèíàöèè êëàâèø +                                                383 Ï2.3.5. Ïðîñìîòð çíà÷åíèé                                                                          384 Ï2.3.6. Ðåäàêòèðîâàíèå è óäàëåíèå â îêíå Watches                                       386 Âû÷èñëåíèå è ìîäèôèêàöèÿ                                                                         387 Ìîäèôèêàöèÿ âûðàæåíèé                                                                            388 Ï2.3.7. Ïîèñê                                                                                            389 Ñòåê âûçîâîâ                                                                                            389 Ïîèñê ïðîöåäóð è ôóíêöèé                                                                         390 Ïðèëîæåíèå 3. Ìîäóëü Graph                                                                       392 Ï3.1. Ïîäêëþ÷åíèå è èíèöèàëèçàöèÿ ìîäóëÿ Graph                                         392 Ï3.1.1. Äðàéâåðû                                                                                       393 Ï3.1.2. Ïðîöåäóðû è ôóíêöèè ïðîöåññà èíèöèàëèçàöèè                                  394 Ïðîöåäóðà InitGraph                                                                                   394 Ôóíêöèÿ GraphResult                                                                                  396 Ôóíêöèÿ GraphErrorMsg                                                                               396 Ïðîöåäóðà CloseGraph                                                                                 397 Ôóíêöèÿ GetGraphMode                                                                               397 Ïðîöåäóðà DetectGraph                                                                               397 Ïðîöåäóðà RestorCRTMode                                                                           398 Ïðîöåäóðà SetGraphMode                                                                            398 Ôóíêöèÿ GetDriverName                                                                               399 Ôóíêöèÿ GetModeName                                                                               399 Ôóíêöèÿ GetMaxMode                                                                                 400 Ôóíêöèÿ GetMaxMode                                                                                 400 Ôóíêöèÿ GetModeName                                                                               400 Ïðîöåäóðà GetViewSettings                                                                         401 Ïðîöåäóðà GraphDefaults                                                                             401 Ï3.2. Ââåäåíèå â ðàáîòó ñ èñïîëüçîâàíèåì ìîäóëÿ Graph                                402 Ï3.2.1. Óïðàâëåíèå ýêðàíîì                                                                        402 Ñèñòåìà êîîðäèíàò                                                                                    402 Òåêóùèé óêàçàòåëü                                                                                    402 Ôóíêöèè GetMaxX è GetMaxY                                                                       403 Ïðîöåäóðà MoveTo                                                                                     403 Ïðîöåäóðà MoveRel                                                                                    403 Ïðîöåäóðû GetX è GetY                                                                               404 Ïðîöåäóðà SetViewPort                                                                               404 Ïðîöåäóðà GetAspectRatio                                                                           405 Ïðîöåäóðà SetAspectRatio                                                                           405 Ïðîöåäóðà ClearDevice                                                                                407 Ïðîöåäóðà ClearViewPort                                                                             407 Ï3.2.2. Ãåîìåòðè÷åñêèå ïðèìèòèâû                                                               407 Ïðîöåäóðà PutPixel                                                                                     407 Ôóíêöèÿ GetPixel                                                                                        408 Ïðîöåäóðà SetLineStyle                                                                               408 Ïðîöåäóðà Line                                                                                          409 Ïðîöåäóðà LineTo                                                                                       409 Ïðîöåäóðà LineRel                                                                                      410 Ïðîöåäóðà Rectangle                                                                                  411 Ïðîöåäóðà DrawPoly                                                                                   411 Ïðîöåäóðà Circle                                                                                        412 Ïðîöåäóðà Arc                                                                                           412 Ïðîöåäóðà GetArcCoords                                                                             412 Ïðîöåäóðà Ellipse                                                                                       414 Ï3.2.3. Òåêñòîâûé âûâîä ñðåäñòâàìè Graph                                                   415 Ïðîöåäóðà OutText                                                                                    415 Ïðîöåäóðà OutTextXY                                                                                 415 Ïðîöåäóðà SetTextStyle                                                                              416 Ïðîöåäóðà SetTextJustify                                                                            418 Ïðîöåäóðà SetUserCharStyle                                                                        418 Ôóíêöèÿ TextWidth                                                                                    418 Ôóíêöèÿ TextHeight                                                                                    419 Ôóíêöèÿ InstallUserFont                                                   ...

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