開発環境
- OS X Lion - Apple(OS)
- TextWrangler(Text Editor) (BBEditの無料、light版)
- 言語: C
- コンパイラ: UNIX ccコンパイラ (汎用UNIX)
『実践プログラミング 第3版』 (Steve Oualline (著)、 望月 康司 (監修) (翻訳)、 谷口 功 (翻訳)、 オライリー・ジャパン、1998年、ISBN978-4900900646) II部(単純なプログラミング)の11章(ビット演算)11.10(プログラミング実習)自習11-3を解いてみる。
実習11-3.
コード(TextWrangler)
#include <stdio.h>
#define X_SIZE 40
#define Y_SIZE 60
char graphics[X_SIZE / 8][Y_SIZE];
#define SET_BIT(x,y) graphics[(x) / 8][y] |= (0x80 >> ((x)%8))
#define CLEAR_BIT(x,y) graphics[(x) / 8][y] &= ~(0x80 >> ((x)%8))
#define TEST_BIT(x,y) graphics[(x) / 8][y] == (0x80 >> ((x)%8))
int main(){
int x, y;
void print_graphics(void);
for(x = 0; x < X_SIZE; x++){
for(y = 0; y < Y_SIZE; y++){
if(x == y){
continue;
}
SET_BIT(x, y);
}
}
print_graphics();
return (0);
}
void print_graphics(void){
int x, y;
unsigned int bit;
for(y = 0; y < Y_SIZE; ++y){
for(x = 0; x < X_SIZE / 8; ++x){
for(bit = 0x80; bit > 0; bit = (bit >> 1)){
if((graphics[x][y] & bit) != 0){
printf("X");
} else {
printf(".");
}
}
}
printf("\n");
}
}
入出力結果(Terminal)
$ cc -g -o sample sample.c $ ./sample .XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX X.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XX.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXX.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXX.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXX.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXX.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXX.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXX.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXX.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXX.XXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXX.XXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXX.XXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXX.XXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXX.XXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXX.XXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX.XXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXX.XXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXX.XXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXX.XXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXX.XXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXX.XXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXX.XXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXX.XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXX.XXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXX.XXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXX.XXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXX.XXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXX.XXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXX.XXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.XXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.XXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.XXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.XXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.XXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.XXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.XXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.XX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.X XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX. XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX $
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