1 / 14

연산자

연산자. unary increment prefix: ++x; int x = 5; int y = ++x; System.out.print ( x + “, “ + y);. unary increment postfix: x++; int x = 5; int y = x++; System.out.print ( x + “, “ + y);. Output. Output. File Edit Window Help. File Edit Window Help. 6, 6. 6, 5. modulus - %.

abie
Download Presentation

연산자

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 연산자 unary increment prefix: ++x; int x = 5; int y = ++x; System.out.print( x + “, “ + y); unary increment postfix: x++; int x = 5; int y = x++; System.out.print( x + “, “ + y); Output Output File Edit WindowHelp File Edit WindowHelp 6, 6 6, 5

  2. modulus - % int x = 5 % 3; System.out.print(x); Output File Edit WindowHelp 2

  3. modulus - % 짝수? 홀수? if(x % 2 == 0)… 짝수 else…홀수

  4. Compound Operators • x += 5; • x -= 5; • x *= 5; • x /= 5; • x %= 5; int x = 10; • x = x + 5; • x = x – 5; • x = x * 5; • x = x / 5; • x = x % 5; • 15 • 5 • 50 • 2 • 0

  5. Implicit Narrowing Conversion byte b = 2; b = b + 10; byte b = 2; b +=10;

  6. 무슨 conversion? • short > int • byte > long • float > long • char > int • char > short • byte > char

  7. 무슨 conversion? • short > int • byte > long • float > long • char > int • char > short • byte > char • widening • widening • narrowing • widening • narrowing • narrowing

  8. conversions byte short int long char

  9. conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast byte short int long char

  10. conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast byte short char Narrowing Conversion

  11. conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast byte char short Narrowing Conversion

  12. conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast byte b = 16; char c = No! b;

  13. conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast byte b = 16; char c = b; (char)

  14. 65535 127 byte -128 char 0

More Related