1581, 9/80 ȸ  α  
   geniusevil
   http://www.cyworld.com/01028852864
   geniusevil c 3

http://www.hackerschool.org/HS_Boards/zboard.php?id=Free_Lectures&no=456 []


ۿ ٽ øϴ.
ð гڼ̴ е鲲 ˼ϰ..    '--;' Կ 帳ϴ.
׸ ణ ߽ϴ. ȴٸ ٽ ֽø ϰڽϴ



---------------------------------------------------

õ geniusevil C ̾ϴ ^^

3°Դϴ. 2° Ⱥ ź 1°,2° ñ..

غ .

- 2° -

        Ű                

                int(2Ʈ)        -32768 ~ 32767

short        short(2Ʈ)        -32768 ~ 32767        

                long(4Ʈ)        -214748368 ~ 214748367

                char(1Ʈ)        -128 ~ 127

ȣ        unsigned int        0 ~ 65535

ȣ¹        unsigned char        0 ~ 255

ȣ±        unsigned long        0 ~ 4294967295

εҼ float(4Ʈ)        1.2E-38 ~ 3.4E38^1

εҼ double(8Ʈ) 2.2E-308 ~ 1.8E308^2

ȯ
%d         (int,short)

%ld         (long)

%f         εҼ (float)

%lf        εҼ (double)

%c         Ѱ (char)

%s        ڿ (char 迭)

%u        ȣ (unsigned int)

%lu        ȣ (unsigned long)

scanf() : ڷκ Է ޴ Լ.

if() : ǹ ̸ {} Ѵ
else if() : if ̰ else if ǹ ̸ {} Ѵ
else () : ̸ else Ѵ

ȣ : #define   ,  const int = ;
Ѵ.

--------------------------------------------.

2° ,,, ұ ߴ ϳ? :)
if ̿ؼ sep̶ ڿ 1 Ǿ , 2 Ǿ ̷ .

׷ c ̷ ִ Լ ִϴ. switch Լ.
if switch 鿡 ȿԴϴ. ̶ α׷ ҽ ϱ Դϴ
鿡 switch ȿ̶ Ҽ.

ߴ switch ؼ ڽϴ.

! ¾? Ҽ ϱ װ 䵵 ⼭ ɴϴ ^^

5
   0: #include <stdio.h>
   1:
   2: main()
   3: {
   4:         int sep;
   5:         float first, second, dival;        //ó,°, Ҽ
   6:         float val;         // Ҽ
   7:
   8:         printf("--------------------------------------\n");
   9:         printf("μ Դϴ. \n");
  10:         printf(":1  :2  :3  :4  ->");
  11:         scanf("%d", &sep);
  12:         printf("--------------------------------------\n");
  13:
  14:         printf("ù° Էϼ ->");
  15:         scanf("%f", &first);
  16:         printf("ι° Էϼ ->");
  17:         scanf("%f", &second);
  18:
  19:         printf("\n");
  20:
  21:         switch (sep)
  22:         {
  23:         case 1 :
  24:                 val = first + second;
  25:                 break;                // switchԼ ̽ȿ break ־Ѵ.
  26:         case 2 :
  27:                 val = first - second;
  28:                 break;
  29:         case 3 :
  30:                 val = first * second;
  31:                 break;
  32:         case 4 :
  33:                 val = first / second;
  34:                 break;
  35:         }
  36:         printf("--------------------------------------\n");
  37:         printf(" %.1fԴϴ.", val);      // float Ҽ 1ڸ
  38:         printf("\n--------------------------------------\n");
  39: }

α׷ : Ҽ µǰ ġ

21 - 35 switchԼԴϴ ^^
switch (ù ȣ ִ )
{                         // ߰ȣ switch Լ Ѵ
        case ȣ :
        
        break;
        case ȣ :
        
        break;
}

Դϴ. ȣ κп charԼ ڰ  ֽϴ.

ù ȣ ִ 2 ִٸ. case 2 : ãư case 2 break; ˴ϴ.

break; switch ģ Ҽֽϴ. پٴ.
switch case ȣ: 븸 ϴ° ƴ϶ case ȣ ġ ̵Ѵٰ ֽϴ. ̵ؼ Ʒ 鼭 ȴٸ ġ ƴ. 5 ε case 2 õƴٸ case 2 case 3 case 4 ǰ. ׷ ġ ƴ ¥ ̵˴ϴ.

װ ġ break; ϴ. break; '߰ȣ ' Դϴ.

case 2 õǼ case 2 ϰ break; switch ߰ȣ case 2 ǰ.


37࿡ val ϴ ȯڰ ̻ ^^? %.1f ó°ǵ.. Ͻôº ð.
%.1f 'Ҽ 1ڸ ϶' Դϴ. ȯ Ư Ʒ ܿҰ! մϴ.

Ͻð.. ? ^^

.
.
.
.
.

- ܿ ! -

ȯ Ưɼ

%4d - ĭ 4ĭ ´         : '  11'

%-4d - ĭ 4ĭ Ѵ           : '11  '

%09 - ü ĭ 9ĭ 0 ä     : '000000011'

%+d - ȣ                 : '+11 , -11'

%.2f - Ҽ 2ڸ                  : '5.43'

%7.2f - ĭ 7ĭ Ҽ 2ڸ          : '    5.43'






.. ù .. ݺ̶° ֽϴ.
϶ ϰ ٽ ˻ؼ ̸ ٽ ϴ Լε.
while, for, do while ֽϴ.

6
   0: #include <stdio.h>
   1:
   2: main()
   3: {
   4:         int val, i;
   5:
   6:         printf("100 ڸ ԷϽÿ");
   7:         scanf("%d", &val);
   8:
   9:         if (val > 100)
  10:                 val = 100;
  11:
  12:         printf("\n");
  13:
  14:         i = 1;
  15:
  16:         while (i <= val)
  17:         {
  18:                 printf("%d ", i);
  19:                 i++;
  20:         }
  21: }

α׷ : ִ밪 Է¹ް ڿ Ѵ.

14 - 20 ø while ƽǰ̴ϴ.
while(ǹ)
{
        
}                     // ٽ ǹ ˻

̷ µ ǹ ̸ ϰ ٽ ǹ ˻մϴ.
׷ ǹ ɶ .

α׷ 14࿡ i 1 . ׸ while ͼ

׷..

  14:         i = 1;
  15:
  16:         while (i <= val)
  17:         {
  18:                 printf("%d ", i);
  19:                 i++;
  20:         }

ٷ ذϴ ֽϴ.

ٷ for .

for (i=0; i<=val; i++)
{
        printf("%d ", i);
}

̷ ŵ Ȱ ȿ մϴ.

for
for(ʱ; ǹ; )
{
        
}

Ǵµ ʱ i = 0; ó ϴ Դϴ.
ǹ i < 10; ó 񱳹ó ̸ ߰ȣ {} մϴ.

߰ȣ ϰ ϴµ i++ , --a 1 Ű ϴ.

Ŀ ٽ ǹ ˻ؼ ̸ ߰ȣ {} մϴ. ̰ ݺǴٰ ǹ 츦 dzʶٰ Ǵ .

i = 1;
while (i <= val)
{
        printf("%d ", i);
        i++;
}



for (i=0; i<=val; i++)
{
        printf("%d ", i);
}

ϴ.

ð ^^?





7
   0: #include <stdio.h>
   1: #include <conio.h>
   2:
   3: main()
   4: {
   5:         int sel;
   6:         char a;
   7:         do
   8:         {
   9:                 printf(" Ұ ҽ\n");
  10:                 printf("y,Y , n,N \n");
  11:                 printf(" Ű \n");
  12:                 do
  13:                 {
  14:                 sel = 2;
  15:                 printf("\n Ͻ÷ Y , ÷ N \n ->");
  16:                 a = getch();
  17:                 putch(a);
  18:                 printf("\n");
  19:                 } while (a != 'Y' && a != 'y' && a != 'N' && a != 'n');
  20:                 if (a == 'Y' || a == 'y')
  21:                         sel = 1;
  22:                 else if (a == 'N' || a == 'n')
  23:                         sel = 0;
  24:                 } while (sel == 1);
  25: }

α׷ : Ұ ׿ ൿ ϴ α׷

! : getch putch ̹ ̸ ʵ Ѵ.

̹ ݺ do whileԴϴ.
do while do ߰ȣ {} ѹ ϰ Ʒ while ˻ ̸ , ̸ Ѿϴ.

while while ó ˻ϰ , ϴ°Ϳ do while  ѹ ȴٴ Դϴ.

ҽ do while ͵ϽǼ ٵ.

7 - 24 do whileԴϴ. ׷ do whileȿ do while ? ̷͵ ϴϴ.

ϴ Ǽ ϳϳ ؼغ ϰڽϴ.

ϴ 7࿡ do ȣ  printf մϴ.

׸ 12࿡ do ȣ ϴ. sel̶ 2 ְ printfԼ մϴ.

׸ getch()Լ a ޴µ.
getch()Լ ڳ ڸ Ѱ ޴ ԼԴϴ. a = getch(); ϸ ڳ ϳ ޾Ƽ a ִ°.
⼭ y n ޴ մϴ.

׸ Ʒ putch(a); a մϴ. getch() ڰ Է Ϳ ʱ ڰ 𸣴 찡 ְŵ. װ ϱ putch();Լ ݴϴ.

׸ do while ǹ κ ߿մϴ!

a != 'Y' && a != 'y' && a != 'N' && a != 'n'

̰ ؼϸ a 'Y' ʰ ׸ a 'y' ʰ ׸ a 'N' ʰ ׸ a 'n' Դϴ. 𸣽ðڴٱ? ;;..

ڸ ڰ ԷѰ Y,y,N,n߿ ϳ ƴҽÿ ٽ do Ͽ ٽ ޴°Դϴ.

Y,y,N,n ϳ Էߴٸ do while 20 .
ִ 񱳹 ڶ Ͽ Ʒ ܿ Ұ! մϴ.

׸ 20࿡ a == 'Y' || a == 'y' ̷ ؼմϴ.

a 'Y' Ǵ a 'y' .

Դϴ. ̰͵ Լϸ ڰ ԷѰ y̰ų Y̸ Ǿ if ȣ մϴ.

̸ ̰ sel 1 ǰ .

׸ ƴϸ ȣ ϰ ׳ Ʒ 22࿡ else if 񱳸 .

⼭ a n̰ų Ǵ a N̸ sel 0 ǰ ˴ϴ.

׸ Ʒ ͼ 24 while sel 1 Ǿ do ư ٽ ϰ ǰ sel 1 ƴϸ ׳ Ʒ α׷ .

ذ ǽð ^^?

.
.
.
.
.
.



- ܿ Ұ! -



&&        : [׸] ϶                 ) (a && b)

||         : [Ǵ] ߿ ϳ ϶         ) (a || b)

!        : [] ̸ ̸         ) ( !(a = 0) )






.. 3° ׿.

7 α׷ α׷ ˴ϴ.

α׷ Ұ Ұ ° ^^.. ׷͵ մϴ.

. 󸶳 İ ߿Ѱ ƴϰ.. 󸶳 ϴİ ߿մϴ ^^

ð ϰ ϰ Ѿô.

c ٽ Լ 쵵 ϰڽϴ ּ ' - ' ¸ ֽô е մϴ

ذ ȵǽô° ðų Ͻǰ ø ̳ Ȩǿ ϼ ^^


Copyright2006 geniusevil( http://www.cyworld.com/01028852864 ) .All rights reserved
Ȥó ۰÷ ^^;;; ǥø ø ۰ŵ ˴ϴ

  Hit : 10732     Date : 2006/01/19 04:18



    
ckdmsghcoh Ф 츮geniusevilԿ ѻ ! . п ̺ nö󰡼˴ 2006/01/19  
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