I(13)

•

–––

•–

#define GRIDSIZE 8

int main(void) {int grid[GRIDSIZE][GRIDSIZE];int x, y;

for(y = 0; y < GRIDSIZE; y++) {for(x = 0; x < GRIDSIZE; x++) {grid[y][x] = 0;

}}grid[3][3] = 1;grid[3][4] = -1;grid[4][3] = -1;grid[4][4] = 1;

. . .

[8][8][]

0 1 2 3 4 5 6 7 àx012

↓ 3y 4

567

1

1

-1

-1

0

1-1

ex1.c

• [] – int array[4][3];

–array[y][x] = 1;printf("data = %d¥n", array[2][2]);scanf("%d", &array[j][i]);

•array[4,3];

void showBoard(int g[GRIDSIZE][GRIDSIZE]);

void showBoard(int g[GRIDSIZE][GRIDSIZE]) {int x, y;

for(y = 0; y < GRIDSIZE; y++) {for(x = 0; x < GRIDSIZE; x++) {if(g[y][x] == 1)printf("* ");else if(g[y][x] == -1)printf("o ");elseprintf(". ");

}printf("¥n");

}}

. . . . . . . .

. . . . . . . .

. . . . . . . .

. . . * o . . .

. . . o * . . .

. . . . . . . .

. . . . . . . .

. . . . . . . .

ex1.c

[]•

void func(int array[8][8]) { ... }void func(int array[][8]) { ... }

•void func(int array[][]) { ... }

[]

• {} –

• {} int data[3][2] = {

{ 4, 5 },{ 2, 3 },{ 1, 7 }

};

0 1

0 4 5

1 2 3

2 1 7

••

#include

int main(void) {int data[3][2] = {{ 4, 5 },{ 2, 3 },{ 1, 7 }

};int x, y;

for(y = 0; y < 3; y++) {for(x = 0; x < 2; x++) {printf("data[%d][%d] = %d¥n", y, x, data[y][x]);

}}return 0;

}

data[0][0] = 4data[0][1] = 5data[1][0] = 2data[1][1] = 3data[2][0] = 1data[2][1] = 7

ex2.c

data

(1)

•

•

1004

1005

1006

1007

1008

1009

1010

1011

1012

1013

1014

1015

int a, b;char c, d;

int a;

int b;

char c;

char d;

int 32bit(4 )char 8bit

a

b

c

d

(2)

• 1004 01005 0

1006 0

1007 0

1008

1009

1010

1011

1012 65

1013

1014

1015

a = 0;c = 'A';'A' 65

•

•

a

b

c

d

1

• scanf%

1004 0

1005 0

1006 0

1007 0

1008

1009

1010

1011

1012 65

1013

1014

1015

scanf("%d", &b);scanf("%c", &d);

• &

• scanf

a

b

c

d

%d int%c char 1

1

• 10041005

1006

1007

1008

1009

1010

1011

1012 1

1013 0

1014 0

1015 0

int x[3];x[2] = 1;

• x 1004• x int 4• x[2] 2 2

x[0]

x[1]1004 + 2 * 4 = 1012

x[2]

• 21004

1005

1006

1007

1008

1009

1010

1011

1012 1

1013 0

1014 0

1015 0

1016 2

1017 0

1018 0

1019 0

1020

1021

1022

int x[3][2];x[1][0] = 1;x[1][1] = 2;

•

• 3

x[0][0]

1004 + (1 * 2 + 0) * 4 = 10121004 + (1 * 2 + 1) * 4 = 1016

x[0][1]

x[1][0]

x[1][1]

x[2][0]

[]•

void func(int array[8][8]) { ... }void func(int array[][8]) { ... }

•void func(int array[][]) { ... }

[]

Q: [] A:

• sizeof()––

•sizeof(int) sizeof(float)

•int b; char str[10];sizeof(b) sizeof(str)

#include

int main(void) {int a, b[4];char str[10] = "Hello!";

printf("size of int is %ld¥n", sizeof(int));printf("size of a is %ld¥n", sizeof(a));printf("size of int[4] is %ld¥n", sizeof(int [4]));printf("size of b is %ld¥n", sizeof(b));printf("size of str is %ld¥n", sizeof(str));

return 0;}

size of int is 4size of a is 4size of int[4] is 16size of b is 16size of str is 10

ex3.c

•float a, b = 1.5;a = (int)b;

– b 1.5) int– a 1.0

•cast : ( )

#include

int main(void) {float a, b = 1.5;int c = 3;

a = b;printf("%f¥n", a);a = (int)b;printf("%f¥n", a);

a = 1/c;printf("%f¥n", a);a = 1/3.0;printf("%f¥n", a);a = 1/(float)c;printf("%f¥n", a);

return 0;}

1.5000001.0000000.0000000.3333330.333333

ex4.c

– ( 1) ? ( 2) : ( 3)• 1 0 2

3•

•––

(1)

• 38–

• turn +1 -1

• 41–

• 42-48–

(2)

• 51-61–

––

53• 64-70

–– human compRandom

(3)

• 83 initBoard()–

• 99 showBoard()–

•

%-2d• #define

(4)

• 125 dir[]–

0-7• 137 isPlaceOK()

– role

•

•

(5)

• 166 place()–– isPlaceOK()

• 201 shouldPass()– isPlaceOK()

• 215 human()––

(6)

• 223 compRandom()––

• 239 countNum()–

••

•

•––

••

––

place() isPlaceOK()