Page 33 - PIC18F4550微處理機C語言設計實務

૵ሔଡ଼ΥႧԊձ C ႧԊ 1

ܸᅺהܸٙЗѧʘʫ࢙הᎷπٙ༟ࣘۨ࿒ * ܸᅺΤ၈ ;

Էνj

int *ipointer; // ੭ୌ໮ᅰ࠽π׳Зѧܸٙᅺ ipointer
char *cpointer; // 8 Зʩ༟ࣘʫ࢙π׳Зѧܸٙᅺ cpointer

܁ѓۨ࿒ʑঐٝ༸ܸᅺӊ̋ 1 ࣛdࠅ༪ཀεˇЗʩଡ଼f

ίਂ܁ѓމܸᅺࣛdܸᅺΤ၈ۃࠦࠅ̋ * ໮fࠅ຾ܸᅺπ՟הܸٙЗѧʘʫ࢙ࣛd

ίܸᅺۃࠦࠅ̋ * ໮f

Էνj

unsigned char Array[] = {0,1,2,3};
unsigned char *cpointer;
cpointer = &Array[0]; // ਗ਼ cpointer ܸᅺܸΣ Array[0] ٙЗѧ
*cpointer = 1; // ਗ਼ cpointer ܸᅺܸΣٙЗѧ€ɰఱ݊ Array[0]
ࡌҷމ 1dੂБഐҼʘܝ Array[] ৬ΐٙʫ࢙ਗ਼ᜊϓ {1,1,2,3}

ࠅ຾༶ၑאܸݼ€assign˸՟੻ܸᅺהܸٙЗѧࣛdܸᅺΤ၈ۃࠦʔ̋ * ໮f

Էνj

ટᚃɪࠦٙ܁ѓd߰ࠅࡌҷ Array[1] ٙʫ࢙d˙جνɨj

cpointer = cpointer+1;
*cpointer = 5;

Ϊމ cpointer ݊܁ѓމ unsigned char ܸٙᅺdה˸ +1 ڌͪЗѧᄣ̋ɓࡈ Byted
ΪϤ +1 ʘܝܸ݊Ց Array[1] ٙЗѧf

ੂБഐҼʘܝ Array[] ৬ΐٙʫ࢙ਗ਼ᜊϓ {1,5,2,3}f

Ңࡁ̙˸Դ͜ & ༶ၑɿ՟̈ᜊᅰٙЗѧ࠽Ԩܸ֛ഗܸᅺdԷνj

int abc = 0x3d ; // ܁ѓɓࡈ዆ᅰᜊᅰ abcdՉʫ࢙݊ 0x3d
int *iptr = &abc ; // ܁ѓɓࡈܸᅺ *iptr ܸΣ዆ᅰᜊᅰ abc ٙЗѧ
iptr = iptr+1; // ܸᅺ *iptr ܸΣɨɓࡈЗѧ€iptr ʫ࢙̋ 2dΪމ݊዆ᅰ
*iptr = *iptr + 1; // ܸᅺ *iptr הܸٙাኳ᜗ʫ࢙̋ 1diptr ʫ࢙Ӛᜊ

ܸᅺٙࠠᓃ̌ঐ̙݊˸஗༶ၑ˸՟੻הࠅٙЗѧdৰəܸ֛༶ၑ =d՟ѧ༶ၑɿ

& ၾ՟࠽༶ၑɿ * ̮dᒔϞ̋ +eಯ –e჈ᄣ ++e჈ಯ ––e޴̋ܝܸ֛ += ၾ޴ಯܝ
ܸ֛ –= ഃ༶ၑɿ̙˸Դ͜f

23