## 2014年7月17日木曜日

### C - 高度な関数: 関数を最大限に活用する(部分文字列の検索(関数にコード(関数の引数に関数)を渡す方法、関数ポインタの作成方法))

Head First C ―頭とからだで覚えるCの基本(David Griffiths (著)、Dawn Griffiths (著) 中田 秀基(監訳)(翻訳)、木下 哲也 (翻訳)、オライリージャパン)の7章(高度な関数: 関数を最大限に活用する)、エクササイズ(p.321)を解いてみる。

その他参考書籍

エクササイズ(p.321)

コード(BBEdit, Emacs)

sample321.c

```#include <stdio.h>
#include <string.h>

#include "sample321.h"

int sports_or_workout(char *s)
{
return strstr(s, "sports") || strstr(s, "working");
}

int ns_theater(char *s)
{
return strstr(s, "NS") && strstr(s, "theater");
}

int arts_theater_or_dining(char *s)
{
return strstr(s, "art") || strstr(s, "theater") || strstr(s, "dining");
}

void find(int (*match)(char*))
{
int i;

puts("検索結果:");
puts("--------------------------------------------------");
for (i = 0; i < NUM_ADS; ++i)
puts("--------------------------------------------------");
}

int main(int argc, char *argv[])
{
find(sports_or_workout);
find(ns_theater);
find(arts_theater_or_dining);

return (0);
}
```

Makefile

```CC=cc
CFLAGS=-g -Wall
SRC=sample321.c
OBJ=sample321.o

all: sample321

sample321: sample321.o
\$(CC) \$(CFLAGS) \$(OBJ) -o sample321

sample321.o: sample321.h sample321.c
\$(CC) \$(CFLAGS) -c sample321.c -o sample321.o

clear:
rm -rf sample321 \$(OBJ)
```

```\$ make && ./sample321
cc -g -Wall -c sample321.c -o sample321.o
cc -g -Wall sample321.o -o sample321

--------------------------------------------------
William: SBM GSHO likes sports, TV, dining
Mike: DWM DS likes trucks, sports and bieber
Peter: SAM likes chess, working out and art
Josh: SJM likes sports, movies and theater
--------------------------------------------------

--------------------------------------------------
Matt: SUM NS likes art, movies, theater
--------------------------------------------------

--------------------------------------------------
William: SBM GSHO likes sports, TV, dining
Matt: SUM NS likes art, movies, theater
Luis: SLM ND likes books, theater, art
Peter: SAM likes chess, working out and art
Josh: SJM likes sports, movies and theater
Jed: DBM likes theater, books and dining
--------------------------------------------------
\$
```