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# 연산자 - PowerPoint PPT Presentation

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 - %.

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## PowerPoint Slideshow about ' 연산자' - daxia

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Presentation Transcript

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

int x = 5 % 3;

System.out.print(x);

Output

File Edit WindowHelp

2

짝수? 홀수?

if(x % 2 == 0)… 짝수

else…홀수

• 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

byte b = 2;

b = b + 10;

byte b = 2;

b +=10;

무슨 conversion?

• short > int

• byte > long

• float > long

• char > int

• char > short

• byte > char

무슨 conversion?

• short > int

• byte > long

• float > long

• char > int

• char > short

• byte > char

• widening

• widening

• narrowing

• widening

• narrowing

• narrowing

byte

short

int

long

char

conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast

byte

short

int

long

char

conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast

byte

short

char

Narrowing Conversion

conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast

byte

char

short

Narrowing Conversion

conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast

byte b = 16;

char c =

No!

b;

conversions between byte, short and char are ALWAYS narrowing conversions requiring explicit cast

byte b = 16;

char c =

b;

(char)

127

byte

-128

char

0