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Nookky Anapat
Nookky Anapat

Variable types in C include char, int, float, double, and others. Variables are declared with a type, followed by the variable name. C uses keywords like int, float etc. to declare variables and constants. Common functions to input/output data include printf to print data and scanf to read input into variables.

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Variable)
????? 2 ?????????????????????????
ASCII character (- char 128 Unsigned - char int - - long 3.4E-38 E+38 Float 1.7E-308 Double E+308 Unsigned int
C Variable Declaration) type name; type : name : C main
#include <stdio.h> int num; ? num float y; ? y
C C
A-Z a-z Underscore) A-Z a-z - Reserved Word)
C ANSI Standard C) defa regist volatil auto float struct break ult er e doubl do far return switch while case e typede signe goto short char else if f d unio unsig contin const enum int sizeof n ned ue exter long static void n Borland C
C char string char name[n] = "str"; nam e n str
C C
C - -
a>b a b a >= b a b a<b a b a <= b a b a == b a b
x < 60 && x > 50 x x == 10 || x == 15 x x = 10 !x x
-
C printf printf int float string
%d %u %f %c
printf Hello printf("Hello Program C Program C"); printf("Lampang Lampang kunlayanee kunlayanee school school"); Lampang printf("Lampang Thailand Thailand");
scanf C scanf
scanf() scanf("format",&varia ble); forma t printf() varia ble
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????? 2 ?????????????????????????

  • 4. ASCII character (- char 128 Unsigned - char int - - long 3.4E-38 E+38 Float 1.7E-308 Double E+308 Unsigned int
  • 5. C Variable Declaration) type name; type : name : C main
  • 6. #include <stdio.h> int num; ? num float y; ? y
  • 7. C C
  • 8. A-Z a-z Underscore) A-Z a-z - Reserved Word)
  • 9. C ANSI Standard C) defa regist volatil auto float struct break ult er e doubl do far return switch while case e typede signe goto short char else if f d unio unsig contin const enum int sizeof n ned ue exter long static void n Borland C
  • 10. C char string char name[n] = "str"; nam e n str
  • 11. C C
  • 12. C - -
  • 13. a>b a b a >= b a b a<b a b a <= b a b a == b a b
  • 14. x < 60 && x > 50 x x == 10 || x == 15 x x = 10 !x x
  • 15. -
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  • 18. printf Hello printf("Hello Program C Program C"); printf("Lampang Lampang kunlayanee kunlayanee school school"); Lampang printf("Lampang Thailand Thailand");
  • 19. scanf C scanf