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Õàäãàëàõ
àíãèëàë, Ðåêóðñ
ЛЕКЦ 8
Õè÷ýýëèéí Àãóóëãà
Õàäãàëàõ àíãèëàë
 Static
 Extern
Áëîê á¿òýö
Ðåêóðñ
Ðåêóðñûí õýðýãëýý
Typedef
3
Õàäãàëàõ àíãèëàë
4
 Õàäãàëàõ àíãèëàë íü õóâüñàã÷èéí àæèëëàõ
õ¿ðýý áà àìüäðàëûí õóãàöààã òîäîðõîéëäîã.
 default áóþó àíõäàã÷ õàäãàëàõ àíãèëàë íü
auto àíãèëàë þì.
 ªºðººð õýëáýë õóâüñàã÷èéã çàðëàõäàà
õàäãàëàõ àíãèëàëûã íü çààæ ºãººã¿é áîë òýð
õóâüñàã÷ íü øóóä auto õàäãàëàõ àíãèëàëààð
çàðëàãäàíà.
 Èéì õàäãàëàõ àíãèëàëòàé çàðëàãäñàí
õóâüñàã÷èéí àæèëëàõ õ¿ðýý íü ëîêàëü áóþó
ôóíêöûí õ¿ðýýíä ë àæèëëàíà.
Static õóâüñàã÷
5
 Óòãà íü òóõàéí ïðîãðàììûí àìüäðàëûí õóãàöààíä
õàäãàëàãääàã, õàðèí àæèëëàõ õ¿ðýý íü íýã ôóíêöûí
õ¿ðýýãýýð òîäîðõîéëîãääîã õóâüñàã÷èéã ñòàòèê õóâüñàã÷
ãýíý.
 Ǻâõºí õóâüñàã÷ ÷ áèø, ôóíêöûã ñòàòèê àíãèëàëààð
çàðëàæ áîëíî.
 Õýðýâ Ñ ïðîãðàìì õýä õýäýí ôàéëààñ òîãòäîã áîë
ñòàòèê àíãèëàëààð çàðëàãäñàí ôóíêöûã òóõàéí ôàéëä ë
õýðýãëýõ áóþó áóñàä ôàéëààñ ýíý ôóíêöûã àøèãëàõ
áîëîìæã¿é áîëíî.
Æèøýý
#include <stdio.h>
Count()
{ static int k=1; printf(“k=%dn”, k++); }
main()
{ Count(); /* k = 1 */
Count(); /* k = 2 */
Count(); /* k = 3 */
Count(); /* k = 4 */
Count(); /* k = 5 */
}
6
extern õóâüñàã÷
Ãàäààä õóâüñàã÷ áîëîí ãàäààä ôóíêöûã
àøèãëàõäàà ò¿¿íèéã extern ò¿ëõ¿¿ð ¿ãýýð
çàðëàäàã.
ªºðººð õýëáýë òàíû àøèãëàõ ãýæ áóé ôóíêö ,
õóâüñàã÷ íü ýíý ôàéëä áèø ººð áóñàä ôàéëä
áàéðëàäàã ¿åä ýíý ò¿ëõ¿¿ð ¿ãèéã àøèãëàí
çàðëàñíààð òýäãýýðèéã àøèãëàõ áîëîìæòîé
áîëíî.
Ǻâõºí ãëîáàëü õóâüñàã÷äûã ë extern õàäãàëàõ
àíãèëàëààð òîäîðõîéëæ ºãíº.
7
Õàäãàëàõ àíãèëàëóóä
8
Ò¿ëõ¿¿ð ¿ã Àæèëëàõ õ¿ðýý Àì üäðàëû í õóãàöàà
auto Ëî êàëü Ôóí êöû í õóãàöàà
static Ëî êàëü Ï ðî ãðàì ì û í òóðø èä
register Ëî êàëü Ï ðî ãðàì ì û í òóðø èä
external Á¿õ ô àéëóóäàä Áàéí ãà
external static Í ýãô àéëä Áàéí ãà
Æèøýý
/* Prg1.c */
#include <stdio.h>
int max,sum;
Sum(int a,int b)
{ sum=a+b; }
Max(int a,int b)
{ max=a>b?a:b; }
9
/* Prg2.c */
#include <stdio.h>
extern int max,sum;
extern int Sum(int,int);
extern int Max(int,int);
main()
{ Sum(2,3); Max(2,3);
printf(" Sum : %dn",sum);
printf(" Max : %dn",max);
}
PROJECT ôàéë
òîäîðõîéëîõ
Äýýðõ prg1.c , prg2.c ôàéëóóäûã íýãòãýí
myprog.exe ïðîãðàìì ¿¿ñãýõèéí òóëä äàðààõ
àãóóëãà á¿õèé .prj ôàéë ¿¿ñãýõ øààðäëàãàòàé.
/* myprog.prj ôàéëûí àãóóëãà */
10
prg1.c
prg2.c
prj ôàéë òîäîðõîéëîõ
prj ôàéëä .c áîëîí .obj ºðãºòãºëòýé ôàéëóóäûã
çààæ ºã÷ áîëíî. ªºðººð õýëáýë èéì ôàéëóóäûã
íýãòãýí ïðîãðàìì ¿¿ñãýõ áîëîëöîîòîé.
¯¿ñãýñýí prj ôàéëàà TurboC ðåäàêòîðûí Project
öýñèéí Project Name ãýñýí ñîíãîëòîä áè÷èæ ºãíº.
11
Áëîê á¿òýö
Áèäíèé ºìíº ¿çñýí÷ëýí auto , register, static õóâüñàã÷èä íü
ôóíêö äîòîð òîäîðõîéëîãäâîë ëîêàëü àæèëëàõ õ¿ðýýòýé
áîëäîã.
Òýãâýë áëîê äîòîð ëîêàëü àæèëëàõ õóâüñàã÷ çàðëàõ
áîëîìæ Ñè õýëä áàéäàã.
Èéì õóâüñàã÷ íü çºâõºí òóõàéí áëîê äîòîð ë àæèëëàõ áà
áëîêîîñ ãàðàõàä óñòàæ ¿ã¿é áîëíî.
12
Æèøýý
int exam(a1,a2)
int a1,a2;
{ int i, n;
. . .
{ int i,temp;
for(i=1;i<n;i++) temp+=i;
}
. . .
}
13
Ðåêóðñ ôóíêö
Õýðýãëýã÷èéí ôóíêö íü øóóä áîëîí øóóä áóñ àðãààð
ººðºº ººðèé㺺 äóóäàõ áîëîìæ Ñè õýëýíä áàéäàã áà
¿¿íèéã ðåêóðñ ãýæ íýðëýäýã.
Òîîã òýìäýãò ìºð áîëãîí õýâëýäýã ôóíêö äýýð æèøýý
àâ÷ ¿çüå.
◦ Ýõëýýä òîîíû öèôð¿¿äèéã îëæ õýâëýõ øààðäëàãàòàé
áà öèôð¿¿äèéã îëîõîä òýäãýýð íü óðâóó äàðààëëààð
áóþó õîéíîîñîî ýõýëæ îëääîã.
◦ Èéìýýñ òýäãýýðèéã çºâ äàðààëàëä îðóóëàí õýâëýõ
øààðäëàãàòàé.
14
Ðåêóðñ ôóíêö
#include <stdio.h>
void pr(long n)
{ if(n<0) { putchar('-'); n=-n; }
if(n/10) pr(n/10);
putchar(n%10+'0');
}
main()
{ clrscr(); pr(1234); printf("n");
pr(7654321); printf("n");
pr(-1234567); printf("n");
}
15
Ðåêóðñ ôóíêö
Ôóíêö íü ººðèé㺺 äóóäàõ òîõèîëäîëä øèíýýð äóóäàãäàõ
ôóíêö íü ººðèéí á¿õ ëîêàëü õóâüñàã÷äàà àíõíû óòãûã íü
òîãòîîí øèíýýð ¿¿ñãýäýã.
Ýíý ¿¿ññýí õóâüñàã÷èä íü ºìíºõ ôóíêöûí õóâüñàã÷äààñ
ÿëãààòàé þì.
ªºðººð õýëáýë ôóíêö á¿ðèéí õóâüñàã÷ õàäãàëäàã ìóæ íü
ÿëãààòàé áóþó ººð ººð ãàçàð áàéðëàäàã.
16
Æèøýýíèé òàéëáàð
17
n=1234 áàéíà. Ôóíêö ðóó 123 ãýñýí óòãà äàìæèíà.
n=123 áàéíà. Ôóíêö ðóó 12 ãýñýí óòãà äàìæèíà.
n=12 áàéíà. Ôóíêö ðóó 1 äàìæèíà.
n=1, n%10 => 1
n=12, n%10 => 2
n=123, n%10 => 3
n=1234, n%10 => 4
Pr(1234/10)
Pr(123/10)
Pr(12/10)
Putchar(‘1’)
Putchar(‘2’)
Putchar(‘3’)
Putchar(‘4’)
Æèøýýã ìºí àëõàìààð ¿ç¿¿ëáýë :
1. pr(1234); 8. if(1/10) /* Õóäàë */
2. if(1234/10) 9. putchar(1%10+'0');Ôóíêöýýñ áóöàõ;
3. pr(123); 10. putchar(12%10+'0'); Ôóíêöýýñ áóöàõ;
4. if(123/10) 11. putchar(123%10+'0');Ôóíêöýýñ áóöàõ;
5. pr(12); 12. putchar(1234%10+'0');Ôóíêöýýñ áóöàõ
6. if(12/10) 13. ÐÅÊÓÐÑ äóóñàâ.
7. pr(1);
18
Øóóä áóñ àðãà
19
 Äýýð ¿ç¿¿ëñýí æèøýý íü ðåêóðñûí íýã òºðºë áóþó ôóíêö íü øóóä ººðèé㺺
äóóäñàí áàéíà.
 Õàðèí øóóä áóñ àðãààð ðåêóðñ ¿¿ñãýæ áîëäîã áà ýíý íü òóõàéí ôóíêö íü
ººðèé㺺 øóóä äóóäàõ áóñ ò¿¿íèé äóóäñàí ººð íýã ôóíêöýýñ òóõàéí ôóíêöûã
äóóääàã àðãà þì.
Func1()
{ . . .
Func2()
. . .
}
Func2()
{ . . .
Func1()
. . .
}
Æèø ýýí ä Func1 ô óí êö í ü àæèëëàõ ÿâöäàà Func2
ô óí êöû ã äóóäàõ áà òýð ô óí êö í ü ýðãýýä Func1 –
èéã äóóäàõ çàì ààð ðåêóðñû ã ¿¿ñãýæ áàéí à.
Ðåêóðñûí à÷ õîëáîãäîë
Ïðîãðàììûí êîä÷èëîëûã áàãà õýìæýýòýé áîëãîõ
Áè÷èõ, îéëãîõîä õÿëáàð áîëîõ
Ìîä ãýõ ìýòèéí øàòëàñàí çîõèîí áàéãóóëàëòòàé
á¿òö¿¿äòýé àæèëëàõ áîëîìæèéã á¿ðä¿¿ëæ ºãäºã.
20
TYPEDEF êîìàíä
Òà ýíý êîìàíäûã àøèãëàí øèíýýð òºðºë òîäîðõîéëîõ
áîëîìæòîé.
Áè÷èãäýõ õýëáýð :
typedef <Òºðºë> <Øèíý òºðºë>;
Æèøýý : typedef float real;
21
typedef êîìàíä
Ýíý êîìàíä íü õààíà çàðëàãäñàíààñ øàëòãààëæ
àæèëëàõ õ¿ðýý íü òîäîðõîéëîãääîã. ªºðººð õýëáýë
ôóíêö äîòîð çàðëàãäâàë àæèëëàõ õ¿ðýý íü ëîêàëü,
ôóíêöýýñ ãàäíà çàðëàãäâàë ãëîáàëü áàéíà.
void ff()
{ typedef short int integer; }
22

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Lecture 8

  • 3. Õè÷ýýëèéí Àãóóëãà Õàäãàëàõ àíãèëàë  Static  Extern Áëîê á¿òýö Ðåêóðñ Ðåêóðñûí õýðýãëýý Typedef 3
  • 4. Õàäãàëàõ àíãèëàë 4  Õàäãàëàõ àíãèëàë íü õóâüñàã÷èéí àæèëëàõ õ¿ðýý áà àìüäðàëûí õóãàöààã òîäîðõîéëäîã.  default áóþó àíõäàã÷ õàäãàëàõ àíãèëàë íü auto àíãèëàë þì.  ªºðººð õýëáýë õóâüñàã÷èéã çàðëàõäàà õàäãàëàõ àíãèëàëûã íü çààæ ºãººã¿é áîë òýð õóâüñàã÷ íü øóóä auto õàäãàëàõ àíãèëàëààð çàðëàãäàíà.  Èéì õàäãàëàõ àíãèëàëòàé çàðëàãäñàí õóâüñàã÷èéí àæèëëàõ õ¿ðýý íü ëîêàëü áóþó ôóíêöûí õ¿ðýýíä ë àæèëëàíà.
  • 5. Static õóâüñàã÷ 5  Óòãà íü òóõàéí ïðîãðàììûí àìüäðàëûí õóãàöààíä õàäãàëàãääàã, õàðèí àæèëëàõ õ¿ðýý íü íýã ôóíêöûí õ¿ðýýãýýð òîäîðõîéëîãääîã õóâüñàã÷èéã ñòàòèê õóâüñàã÷ ãýíý.  Ǻâõºí õóâüñàã÷ ÷ áèø, ôóíêöûã ñòàòèê àíãèëàëààð çàðëàæ áîëíî.  Õýðýâ Ñ ïðîãðàìì õýä õýäýí ôàéëààñ òîãòäîã áîë ñòàòèê àíãèëàëààð çàðëàãäñàí ôóíêöûã òóõàéí ôàéëä ë õýðýãëýõ áóþó áóñàä ôàéëààñ ýíý ôóíêöûã àøèãëàõ áîëîìæã¿é áîëíî.
  • 6. Æèøýý #include <stdio.h> Count() { static int k=1; printf(“k=%dn”, k++); } main() { Count(); /* k = 1 */ Count(); /* k = 2 */ Count(); /* k = 3 */ Count(); /* k = 4 */ Count(); /* k = 5 */ } 6
  • 7. extern õóâüñàã÷ Ãàäààä õóâüñàã÷ áîëîí ãàäààä ôóíêöûã àøèãëàõäàà ò¿¿íèéã extern ò¿ëõ¿¿ð ¿ãýýð çàðëàäàã. ªºðººð õýëáýë òàíû àøèãëàõ ãýæ áóé ôóíêö , õóâüñàã÷ íü ýíý ôàéëä áèø ººð áóñàä ôàéëä áàéðëàäàã ¿åä ýíý ò¿ëõ¿¿ð ¿ãèéã àøèãëàí çàðëàñíààð òýäãýýðèéã àøèãëàõ áîëîìæòîé áîëíî. Ǻâõºí ãëîáàëü õóâüñàã÷äûã ë extern õàäãàëàõ àíãèëàëààð òîäîðõîéëæ ºãíº. 7
  • 8. Õàäãàëàõ àíãèëàëóóä 8 Ò¿ëõ¿¿ð ¿ã Àæèëëàõ õ¿ðýý Àì üäðàëû í õóãàöàà auto Ëî êàëü Ôóí êöû í õóãàöàà static Ëî êàëü Ï ðî ãðàì ì û í òóðø èä register Ëî êàëü Ï ðî ãðàì ì û í òóðø èä external Á¿õ ô àéëóóäàä Áàéí ãà external static Í ýãô àéëä Áàéí ãà
  • 9. Æèøýý /* Prg1.c */ #include <stdio.h> int max,sum; Sum(int a,int b) { sum=a+b; } Max(int a,int b) { max=a>b?a:b; } 9 /* Prg2.c */ #include <stdio.h> extern int max,sum; extern int Sum(int,int); extern int Max(int,int); main() { Sum(2,3); Max(2,3); printf(" Sum : %dn",sum); printf(" Max : %dn",max); }
  • 10. PROJECT ôàéë òîäîðõîéëîõ Äýýðõ prg1.c , prg2.c ôàéëóóäûã íýãòãýí myprog.exe ïðîãðàìì ¿¿ñãýõèéí òóëä äàðààõ àãóóëãà á¿õèé .prj ôàéë ¿¿ñãýõ øààðäëàãàòàé. /* myprog.prj ôàéëûí àãóóëãà */ 10 prg1.c prg2.c
  • 11. prj ôàéë òîäîðõîéëîõ prj ôàéëä .c áîëîí .obj ºðãºòãºëòýé ôàéëóóäûã çààæ ºã÷ áîëíî. ªºðººð õýëáýë èéì ôàéëóóäûã íýãòãýí ïðîãðàìì ¿¿ñãýõ áîëîëöîîòîé. ¯¿ñãýñýí prj ôàéëàà TurboC ðåäàêòîðûí Project öýñèéí Project Name ãýñýí ñîíãîëòîä áè÷èæ ºãíº. 11
  • 12. Áëîê á¿òýö Áèäíèé ºìíº ¿çñýí÷ëýí auto , register, static õóâüñàã÷èä íü ôóíêö äîòîð òîäîðõîéëîãäâîë ëîêàëü àæèëëàõ õ¿ðýýòýé áîëäîã. Òýãâýë áëîê äîòîð ëîêàëü àæèëëàõ õóâüñàã÷ çàðëàõ áîëîìæ Ñè õýëä áàéäàã. Èéì õóâüñàã÷ íü çºâõºí òóõàéí áëîê äîòîð ë àæèëëàõ áà áëîêîîñ ãàðàõàä óñòàæ ¿ã¿é áîëíî. 12
  • 13. Æèøýý int exam(a1,a2) int a1,a2; { int i, n; . . . { int i,temp; for(i=1;i<n;i++) temp+=i; } . . . } 13
  • 14. Ðåêóðñ ôóíêö Õýðýãëýã÷èéí ôóíêö íü øóóä áîëîí øóóä áóñ àðãàà𠺺𺺠ººðèé㺺 äóóäàõ áîëîìæ Ñè õýëýíä áàéäàã áà ¿¿íèéã ðåêóðñ ãýæ íýðëýäýã. Òîîã òýìäýãò ìºð áîëãîí õýâëýäýã ôóíêö äýýð æèøýý àâ÷ ¿çüå. ◦ Ýõëýýä òîîíû öèôð¿¿äèéã îëæ õýâëýõ øààðäëàãàòàé áà öèôð¿¿äèéã îëîõîä òýäãýýð íü óðâóó äàðààëëààð áóþó õîéíîîñîî ýõýëæ îëääîã. ◦ Èéìýýñ òýäãýýðèéã çºâ äàðààëàëä îðóóëàí õýâëýõ øààðäëàãàòàé. 14
  • 15. Ðåêóðñ ôóíêö #include <stdio.h> void pr(long n) { if(n<0) { putchar('-'); n=-n; } if(n/10) pr(n/10); putchar(n%10+'0'); } main() { clrscr(); pr(1234); printf("n"); pr(7654321); printf("n"); pr(-1234567); printf("n"); } 15
  • 16. Ðåêóðñ ôóíêö Ôóíêö íü ººðèé㺺 äóóäàõ òîõèîëäîëä øèíýýð äóóäàãäàõ ôóíêö íü ººðèéí á¿õ ëîêàëü õóâüñàã÷äàà àíõíû óòãûã íü òîãòîîí øèíýýð ¿¿ñãýäýã. Ýíý ¿¿ññýí õóâüñàã÷èä íü ºìíºõ ôóíêöûí õóâüñàã÷äààñ ÿëãààòàé þì. ªºðººð õýëáýë ôóíêö á¿ðèéí õóâüñàã÷ õàäãàëäàã ìóæ íü ÿëãààòàé áóþó ººð ººð ãàçàð áàéðëàäàã. 16
  • 17. Æèøýýíèé òàéëáàð 17 n=1234 áàéíà. Ôóíêö ðóó 123 ãýñýí óòãà äàìæèíà. n=123 áàéíà. Ôóíêö ðóó 12 ãýñýí óòãà äàìæèíà. n=12 áàéíà. Ôóíêö ðóó 1 äàìæèíà. n=1, n%10 => 1 n=12, n%10 => 2 n=123, n%10 => 3 n=1234, n%10 => 4 Pr(1234/10) Pr(123/10) Pr(12/10) Putchar(‘1’) Putchar(‘2’) Putchar(‘3’) Putchar(‘4’)
  • 18. Æèøýýã ìºí àëõàìààð ¿ç¿¿ëáýë : 1. pr(1234); 8. if(1/10) /* Õóäàë */ 2. if(1234/10) 9. putchar(1%10+'0');Ôóíêöýýñ áóöàõ; 3. pr(123); 10. putchar(12%10+'0'); Ôóíêöýýñ áóöàõ; 4. if(123/10) 11. putchar(123%10+'0');Ôóíêöýýñ áóöàõ; 5. pr(12); 12. putchar(1234%10+'0');Ôóíêöýýñ áóöàõ 6. if(12/10) 13. ÐÅÊÓÐÑ äóóñàâ. 7. pr(1); 18
  • 19. Øóóä áóñ àðãà 19  Äýýð ¿ç¿¿ëñýí æèøýý íü ðåêóðñûí íýã òºðºë áóþó ôóíêö íü øóóä ººðèé㺺 äóóäñàí áàéíà.  Õàðèí øóóä áóñ àðãààð ðåêóðñ ¿¿ñãýæ áîëäîã áà ýíý íü òóõàéí ôóíêö íü ººðèé㺺 øóóä äóóäàõ áóñ ò¿¿íèé äóóäñàí ººð íýã ôóíêöýýñ òóõàéí ôóíêöûã äóóääàã àðãà þì. Func1() { . . . Func2() . . . } Func2() { . . . Func1() . . . } Æèø ýýí ä Func1 ô óí êö í ü àæèëëàõ ÿâöäàà Func2 ô óí êöû ã äóóäàõ áà òýð ô óí êö í ü ýðãýýä Func1 – èéã äóóäàõ çàì ààð ðåêóðñû ã ¿¿ñãýæ áàéí à.
  • 20. Ðåêóðñûí à÷ õîëáîãäîë Ïðîãðàììûí êîä÷èëîëûã áàãà õýìæýýòýé áîëãîõ Áè÷èõ, îéëãîõîä õÿëáàð áîëîõ Ìîä ãýõ ìýòèéí øàòëàñàí çîõèîí áàéãóóëàëòòàé á¿òö¿¿äòýé àæèëëàõ áîëîìæèéã á¿ðä¿¿ëæ ºãäºã. 20
  • 21. TYPEDEF êîìàíä Òà ýíý êîìàíäûã àøèãëàí øèíýýð òºðºë òîäîðõîéëîõ áîëîìæòîé. Áè÷èãäýõ õýëáýð : typedef <Òºðºë> <Øèíý òºðºë>; Æèøýý : typedef float real; 21
  • 22. typedef êîìàíä Ýíý êîìàíä íü õààíà çàðëàãäñàíààñ øàëòãààëæ àæèëëàõ õ¿ðýý íü òîäîðõîéëîãääîã. ªºðººð õýëáýë ôóíêö äîòîð çàðëàãäâàë àæèëëàõ õ¿ðýý íü ëîêàëü, ôóíêöýýñ ãàäíà çàðëàãäâàë ãëîáàëü áàéíà. void ff() { typedef short int integer; } 22