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3. ¾¤Î¸À¸ì¤È¤ÎÈæ³Ó
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/* [¥ê¥¹¥È1] ¶ë·ÁÇȤò½ÐÎϤ¹¤ë */
/* R8C/15¥Þ¥¤¥³¥óÍÑ */
void    main(void);
void    main()
{
p1 = 0x40;      /* P1_6='H', ¤½¤ì°Ê³°P1¤Ï'L'    */
pd1 = 0xd4;     /* P1_7, P1_6, P1_4, P1_2¤Ï½ÐÎÏ */
while( 1 )
    {           /* ¤Þ¤ºCPU¤Î³Îǧ (P1_6¤Ë¶ë·ÁÇȤ¬¤Ç¤ì¤ÐOK) */
    p1 = 0x40;  /* P1_6=H   CPU¤¬Æ°ºî¤·¤Æ¤¤¤ë¤«³Îǧ */
    P1 = 0;     /* P1_6=L */
    }           /* ¤³¤Î¥×¥í¥°¥é¥à¤Ï±Ê±ó¤Ë½ªÎ»¤·¤Ê¤¤ */
}               /* OS¤ò»ÈÍѤ·¤Ê¤¤¤Î¤Ç¤¢¤ì¤Ðmain¤Ï½ªÎ»¤µ¤»¤Ê¤¤ */

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unsigned charÉ乿¤Ê¤· ʸ»ú
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unsigned shortÉ乿¤Ê¤· ûÀ°¿ô
intÉ乿ÉÕ À°¿ô
unsigned intÉ乿¤Ê¤· À°¿ô
longÉ乿ÉÕ Ä¹À°¿ô (int¤ÈƱ¤¸¤«¤è¤êÂ礭¤ÊÃͤòÊݸ¤Ç¤­¤ë)
unsigned longÉ乿¤Ê¤· ĹÀ°¿ô
floatÉâÆ°¾®¿ôÅÀ
doubleÇÜÀºÅÙ ÉâÆ°¾®¿ôÅÀ (float¤ÈƱ¤¸¤«¤è¤ê¹­¤¤ÈϰϤÎÃͤòÊݸ¤Ç¤­¤ë)

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[Ãí°ÕÅÀ] ³ÊǼ¤Ç¤­¤ëÈϰϤòͤ¨¤¿¿ôÃͤòÊÑ¿ô¤Ë³ÊǼ¤·¤è¤¦¤·¤¿»þ¤Ë¤Ï¡¢ ¥¨¥é¡¼¥á¥Ã¥»¡¼¥¸¤Ï¤Ç¤Þ¤»¤ó¡£¡¡ (BASIC¥¤¥ó¥¿¥×¥ê¥¿¤ÏưŪ¤Ë¥Á¥§¥Ã¥¯¤·¤Æ¤¤¤ë¤Î¤ËÂФ·¡¢C¸À¸ì¤Ç¤Ï¥Î¡¼¥Á¥§¥Ã¥¯¤Ç¤¹¡£)¡¡ ¥ª¡¼¥Ð¡¼¥Õ¥í¡¼¤¹¤ë²ÄǽÀ­¤Î¤¢¤ë»þ¤Ï¡¢±é»»·ë²Ì¤ò¤¹¤ëÁ°¤Ë¥ª¡¼¥Ð¡¼¥Õ¥í¡¼¤·¤Ê¤¤¤³¤È¤ò¥Á¥§¥Ã¥¯¤¹¤ë¥×¥í¥°¥é¥à¡¢¤¢¤ë¤¤¤ÏÆþÎϥǡ¼¥¿¤ÎºÇÂçÃͤòÀ©¸Â¤¹¤ë¥ê¥ß¥Ã¥¿¡¼¥×¥í¥°¥é¥à ¤òÄɲ乤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£

/* [¥ê¥¹¥È7] ÊÑ¿ô¤ÎÄêµÁ(ʸ»úÎó) */
char msg[20] = {"¥µ¥ó¥×¥ëʸ»úÎó"};    /* ºÇÄã15¥Ð¥¤¥ÈɬÍ× */
/* msg¤È¸À¤¦ char·¿¤ÎÇÛÎó¤òºî¤ê¡¢½é´üÃͤò¡Ö¥µ¥ó¥×¥ëʸ»úÎó¡×¤È¤¹¤ë¡£ */

Äê¿ô¡¦¥Þ¥¯¥í

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Äê¿ô¤Î´Êά½ñ¼°:
const  ¥¿¥¤¥×  Äê¿ô¤Î̾Á° = Äê¿ô¤ÎÃÍ;

¥Þ¥¯¥í¤Î½ñ¼°:
#define  ¥Þ¥¯¥í¤Î̾Á°  ¥Þ¥¯¥í¤ÎÃÍ
1¤Ä¤Î¥Þ¥¯¥í¤òÊ£¿ô¹Ô¤Ë¤ï¤¿¤Ã¤Æ½ñ¤­¤¿¤¤¾ì¹ç¤Ï\(·Ñ³¹Ô)¤ò»ÈÍѤ·¤Þ¤¹¡£¡¡ ¥Þ¥¯¥í¤Ïʸ¤Ç¤Ï¤Ê¤¤¤Î¤ÇºÇ¸å¤Ë¥»¥ß¥³¥í¥ó¤ÏɬÍפ¢¤ê¤Þ¤»¤ó¡£¡¡
/* [¥ê¥¹¥È8] ¥Þ¥¯¥í¤ÈÄê¿ô¤ÎÄêµÁ */
define  ABC  123        /* ¥Þ¥¯¥í     */
const char   c = 'M';   /* ʸ»ú       */
const int    i = 2;     /* À°¿ô       */
const long   x = 3000L; /* ¹âÀºÅÙÀ°¿ô */
const float  a = 3.14;  /* ÉâÆ°¾®¿ôÅÀ */

IO¤òľÀÜÀ©¸æ¤¹¤ë¡Á¥Ü¥é¥¿¥¤¥ë(volatile)

¥Ü¥é¥¿¥¤¥ë¤Ï¡¢IO¤ËÂФ·¤Æ¥¢¥¯¥»¥¹¤·¤Þ¤¹¡£ ¤¢¤ë¤¤¤Ï³ä¤ê¹þ¤ß¥ë¡¼¥Á¥ó¤ä¥Þ¥ë¥Á¥¿¥¹¥¯´Ä¶­¤Î¥¿¥¹¥¯¤«¤é¥¢¥¯¥»¥¹¤µ¤ì¤ëÊÑ¿ô¤ËÂФ·¤ÆºÇŬ²½¤ò¶Ø»ß¤·¤Þ¤¹¡£¡¡
/* [¥ê¥¹¥È9] IO¤ËÂФ·¤Æ¥¢¥¯¥»¥¹¤¹¤ë */
#define  P1  (*(volatile unsigned char*)0xe1) /* ¥Ý¡¼¥ÈP1 ¥ì¥¸¥¹¥¿ */
P1 = 0xff;   /* IO¤ËÂФ·¤Æ0xff¤ò½ñ¤­¹þ¤à */

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/* [¥ê¥¹¥È10] ¥Ý¥¤¥ó¥¿¤Î»ÈÍÑÎã */
int    a, *pa;    /* ¤³¤³¤Ç¤Ï¥Ý¥¤¥ó¥¿pa¤Ï¤È¤ó¤Ç¤â̵¤¤¾ì½ê¤ò»Ø¤·¤Æ¤¤¤ë */
long   b, *pb;    /* ¤³¤³¤Ç¤Ï¥Ý¥¤¥ó¥¿pb¤Ï¤È¤ó¤Ç¤â̵¤¤¾ì½ê¤ò»Ø¤·¤Æ¤¤¤ë */
int    *p2;
void main();      /* ¥×¥í¥È¥¿¥¤¥×Àë¸À*/
void main()
    {
    pa = &a;     /* ¤³¤³¤Ç½é¤á¤Æpa¤¬a¤Î¤¢¤ë¾ì½ê¤ò¼¨¤¹¤è¤¦¤Ë¤Ê¤ë */
    pb = &b;     /* ¤³¤³¤Ç½é¤á¤Æpb¤¬b¤Î¤¢¤ë¾ì½ê¤ò¼¨¤¹¤è¤¦¤Ë¤Ê¤ë */
    a = 3;   b = 2L;
    /* pa = pb;   NG!!   ·¿¤Î°ã¤¦¥Ý¥¤¥ó¥¿¤ÏÂåÆþ¤Ç¤­¤Ê¤¤ */
    p2 = pb;        /* ¥Ý¥¤¥ó¥¿¤ÏÂåÆþ¤â¤Ç¤­¤ë¡£ pa,p2¶¦¤Ëb¤Î¾ì½ê¤ò¼¨¤¹ */
    *pa = 0;        /* a = 0; ¤ÈƱ¤¸             */
    while(1)  ;     /* ̵¸Â¥ë¡¼¥×                */
    }
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/* [¥ê¥¹¥È12] ¥á¥â¥ê¡¼¤Î³ÎÊݤȳ«Êü¤ò¤¹¤ë */
#include <stdlib.h>
char *buf;        /* char·¿¤Î¥Ý¥¤¥ó¥¿buf¤ÎÄêµÁ */
void main();      /* ¥×¥í¥È¥¿¥¤¥×Àë¸À          */
void main()
    {
             /* malloc¤Ï¥á¥â¥ê¡¼¤ò³ÎÊݤ·¤Ævoid¥Ý¥¤¥ó¥¿¤òÊÖ¤¹ */
    buf = (char*)malloc(1024); /* ¤³¤³¤Çvoid·¿¥Ý¥¤¥ó¥¿¤òchar¥Ý¥¤¥ó¥¿¤ËÊÑ´¹ */
    *buf = 5;   /* buf¤Î»Ø¤¹¾ì½ê¤Ë½ñ¤­¹þ¤ß */
    free( buf ); /* ¥á¥â¥ê¡¼¤Î²òÊü*/
    while(1) ;      /* ̵¸Â¥ë¡¼¥× */
    }
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C¸À¸ì¤ÏÇÛÎó¤Îꤍ»ú¤ÎÃͤò¼«Æ°Åª¤Ë¥Á¥§¥Ã¥¯¤·¤Þ¤»¤ó¡£¡¡ array_a[3]¤ÈÄêµÁ¤·¤¿¾ì¹ç¤Ïꤍ»ú([]¤ÎÃæ¤Î¿ô»ú)¤ÎÈϰϤÏ0¡Á2¤Þ¤Ç¤Ç¤¹¡£¡¡ (ꤍ»ú¤Ï0¤«¤é»Ï¤á¤ë»ö¤ËÃí°Õ)¡¡ ꤍ»ú¤ÎÃͤòÉé¤ÎÃÍ¡¢¤¢¤ë¤¤¤Ï3°Ê¾å¤Ç½ñ¤­¹þ¤ß¤ò¤·¤Æ¤·¤Þ¤Ã¤¿¾ì¹ç¤Ï¡¢Í½Â¬ÉÔ²Äǽ¤Ê¥¢¥É¥ì¥¹Îΰè¤ò½ñ¤­´¹¤¨¤Æ¤·¤Þ¤¤¡¢CPU˽Áö¤Î´í¸±¤¬¤¢¤ê¤Þ¤¹¡£¡¡


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/* [¥ê¥¹¥È13] ÇÛÎó¤Î»ÈÍÑÎã */
int   array_a[3];    /* ÇÛÎó¤ÎÄêµÁ Í×ÁǤÏ3¸Ä         */
char  array_b[4];    /* Í×ÁǤÏ4¸Ä  (ꤍ»ú¤Ï0¡Á3)    */
array_a[0] = 25;     /* ÇÛÎó¤Î»Ï¤á¤ÎÍ×ÁǤËÂåÆþ       */
/* array_b[4] = 2;   NG! (¥¨¥é¡¼¥á¥Ã¥»¡¼¥¸¤Ï½Ð¤Ê¤¤)  */
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/* [¥ê¥¹¥È11] ÇÛÎó¤È¥Ý¥¤¥ó¥¿¤Î»ÈÍÑÎã    */
int    *pa, *pb;       /* ¤³¤³¤Ç¤Ï¥Ý¥¤¥ó¥¿pa¤Ï¤È¤ó¤Ç¤â̵¤¤¾ì½ê¤ò»Ø¤·¤Æ¤¤¤ë */
int    my_array[10];   /* int¤ò10¸Ä»ý¤Ä¡¡ÇÛÎó¤òºî¤ë¡£        */
char   *pc;            /* pc¤Ïchar¤ò»Ø¤·¼¨¤¹¥Ý¥¤¥ó¥¿          */
char   my_ch[4];       /* char¤ò4¸Ä»ý¤ÄÇÛÎó(3ʸ»ú¤Þ¤Ç¤Îʸ»úÎó) */
void main();           /* ¥×¥í¥È¥¿¥¤¥×Àë¸À                    */

void main()
    {
    pa = my_array;   /* Âç³ç¸Ì¤ò³°¤¹¤ÈÇÛÎó¤ÎÀèÆ¬¤ÎÍ×ÁǤξì½ê¤òÊÖ¤¹¡£ */
    pb = pa + 5;    /* 5¸Äʬ¸å¤í¤Ë¿Ê¤á¤¿¾ì½ê my_array[5]¤ò»Ø¤¹  */
    pb--;           /* 1¸Ä¤À¤±Ì᤹¡£  pb¤Ïmy_array[4]¤ò»Ø¤¹     */

    pc = my_ch;
    pc++;           /* pc¤Ï1¥Ð¥¤¥È°Üư(char¤Ï1¥Ð¥¤¥È) */
    while(1) ;      /* ̵¸Â¥ë¡¼¥× */
    }
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/* [¥ê¥¹¥È14] ¹½Â¤ÂΤλÈÍÑÎã */
struct my_tag
    {
    int    a;  /* my_tag¤ÎÍ×ÁÇ a */
    char   b;  /* my_tag¤ÎÍ×ÁÇ b */
    long   c;  /* my_tag¤ÎÍ×ÁÇ c */
    };         /* ¹½Â¤ÂΤΥ¿¥°¤òºî¤ë¡£¥»¥ß¥³¥í¥ó¤¬É¬Í×  */
void my_func(*struct my_tag);  /* ¥×¥í¥È¥¿¥¤¥×Àë¸À      */
void main(void);             /* ¥×¥í¥È¥¿¥¤¥×Àë¸À */
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struct my_tag struct_y;  /* ¥¿¥°¤Ï²¿²ó¤Ç¤â»ÈÍѤǤ­¤Þ¤¹  */
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    {
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    my_func(&struct_y);      /* ¹½Â¤ÂΤΥݥ¤¥ó¥¿¤ò´Ø¿ô¤Î°ú¿ô¤Ë¤¹¤ë */
    /* struct_y.b¤¬10¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤Ï¤º */
    while(1) ;      /* ̵¸Â¥ë¡¼¥× */
    }
void my_func( *struct my_tag my_val )
    {
    my_val->b = 10; /* ¹½Â¤ÂΤΥݥ¤¥ó¥¿¤«¤éÍ×ÁǤò½¦¤¦¾ì¹ç¤Ï->¤ò»ÈÍÑ */
    }

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int  a;
int  b;
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    {
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    b = 9 - 4 * 10;  /* ­¢ 4¤È10¤ò¾è»»¤¹¤ë¡£ 9¤«¤é¤½¤Î±é»»·ë²Ì¤ò¸º»»¤·¤Æ */
                     /* ·ë²Ì¤òb¤ËÂåÆþ¤¹¤ë¡£                          */
    }

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/* [¥ê¥¹¥È16] ÏÀÍý±é»»»Ò */
int x=12;
void main(); /* ¥×¥í¥È¥¿¥¤¥×Àë¸À*/
void main()
    {
    if( x>=10 || x>=20 )
        {  /* x¤¬10¤«¤é20¤ÎÈϰϤξì¹ç¤Ë¼Â¹Ô */
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        while(1) ; /* ̵¸Â¥ë¡¼¥× */
        }
    while(1)  ; /* ̵¸Â¥ë¡¼¥× */
    }

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/* [¥ê¥¹¥È17] ¥Ó¥Ã¥È±é»»»Ò¡¢¥¤¥ó¥¯¥ê¥á¥ó¥È¡¢¥Ç¥£¥¯¥ê¥á¥ó¥È */
int    a, b;
void main(); /* ¥×¥í¥È¥¿¥¤¥×Àë¸À */
void main()
    {
    a = ((7 & 2) | 256);  /* 7¤È2¤ÎAND¤ò¤È¤Ã¤Æ¡¢¤½¤Î·ë²Ì¤ËÂФ·¤Æ256¤òOR¤¹¤ë¡£ */
                          /* ·ë²Ì¤òa¤ËÂåÆþ  (a¤Ï258¤Ë¤Ê¤ë)                    */
    b = (a >> 1);         /* a¤ò1 bit±¦¥·¥Õ¥È¤·¤Æ b¤ËÂåÆþ¡£ (b¤Ï129¤Ë¤Ê¤ë)    */
    a++;        /* ¥¤¥ó¥¯¥ê¥á¥ó¥È (a¤Ï259) */
    b--;        /* ¥Ç¥£¥¯¥ê¥á¥ó¥È (b¤Ï128) */
    while(1)  ; /* ̵¸Â¥ë¡¼¥×              */
    }

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/* [¥ê¥¹¥È18] ÌÀ¼¨Åª¤Ê·¿¤ÎÊÑ´¹ */
int    a, b;
float  x;
void main(); /* ¥×¥í¥È¥¿¥¤¥×Àë¸À */
void main()
    {
    a = 3;   b = 2;
    x = (float)a / (float)b;    /* a¤Èb¤Î·¿¤ÏƱ¤¸¤À¤¬Àè¤ËÉâÆ°¾®¿ôÅÀ¤Ë  */
                                /* ÊÑ´¹¤·¤Æ¤ª¤«¤Ê¤¤¤ÈÀºÅÙ¤¬Íî¤Á¤ë      */
    while(1)  ;   /* ̵¸Â¥ë¡¼¥× */
    }

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void main(); /* ¥×¥í¥È¥¿¥¤¥×Àë¸À */
void main()
    {
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    }

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/* [¥ê¥¹¥È21] °ú¿ôÉդΥޥ¯¥í */
/* P16¤ËÀܳ¤·¤¿LED1¤ò¥Þ¥¯¥í¤ÇÀ©¸æ */
#define  P1  (*(volatile unsigned char*)0xe1)  /* ¥Ý¡¼¥ÈP1 ¥ì¥¸¥¹¥¿ */
#define  PD1 (*(volatile unsigned char *)0xe3) /* ¥Ý¡¼¥ÈP1 Êý¸þ¥ì¥¸¥¹¥¿ */
#defien LED1(d) {if((d)!=0) P1=(P1 | 0x40); else P1=(P1 & 0xbf);}
void main(void);  /* ¥×¥í¥È¥¿¥¤¥×Àë¸À */
void main()
{
PD1 = 0xd4;   /* P1_7, P1_6, P1_4, P1_2¤Ï½ÐÎÏ */
P1 = 0;       /* P1¤ò½é´ü²½        */
LED1(1)       /* LED1¤ò'H'¤Ë¤¹¤ë   */
LED1(0)       /* LED1¤ò'L'¤Ë¤¹¤ë   */
while(1)  ;   /* ̵¸Â¥ë¡¼¥×        */
}
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