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

ptr01.c

#include <stdio.h>

int main( void )

{

short *pi,pj;

short s=10;

pi=&s;

pj=&s;

printf("s=%d\n",*pi);

printf("s=%d\n",*pj);

return 0 ;

}

ptr02.c

#include <stdio.h>

int main( void )

{

short *pi,*pj;

short s=10;

pi=&s;

pj=&s;

printf("s=%d\n",*pi);

printf("s=%d\n",*pj);

return 0 ;

}

ptr03.c

#include <stdio.h>

typedef short* pShort;

int main( void )

{

pShort pi,pj;

short s=10;

pi=&s;

pj=&s;

printf("s=%d\n",*pi);

printf("s=%d\n",*pj);

return 0 ;

}

ptr03a.c

#include <stdio.h>

#define pShort short*

int main( void )

{

pShort pi,pj;

short s=10;

pi=&s;

pj=&s;

printf("s=%d\n",*pi);

printf("s=%d\n",*pj);

return 0 ;

}

ptr04.c

#include <stdio.h>

int main( void )

{

const char* pa;

char a[100]="abc";

pa=a;

printf("%s\n",pa);

/* *pa='A'; error */

return 0 ;

}

ptr04a.c

#include <stdio.h>

int main( void )

{

const char* pa;

char* pb;

char a[100]="abc";

pa=pb=a;

printf("%s\n",pa);

*pb='A';

printf("%s\n",pb);

return 0 ;

}

ptr05.c

#include <stdio.h>

int main( void )

{

char a[100]="abc";

char* const pa=a;

printf("%s\n",pa);

*pa='A';

printf("%s\n",pa);

/* pa++; error */

return 0 ;

}

ptr05a.c

#include <stdio.h>

int main( void )

{

char a[100]="abc";

const char *const pa=a;

printf("%s\n",pa);

/* *pa='A'; error */

/* pa++; error */

return 0 ;

}

ptr06.c

* arguemnts

#include <stdio.h>

int subInc( int i )

{

return ++i;

}

int subDec( int i )

{

return --i;

}

int main( void )

{

int i;

int (*pSub)(int i);

pSub=subInc;

i=pSub(10);

printf( "i=%d\n", i);

pSub=subDec;

i=pSub(10);

printf( "i=%d\n", i);

return 0 ;

}

ptr07.c

* arguemnts

#include <stdlib.h>

void saikoro1( void );

void saikoro2( void );

void saikoro3( void );

void saikoro4( void );

void saikoro5( void );

void saikoro6( void );

void saikoroNG( void );

int main( void )

{

int i;

srand( 1 );

while( 1 )

{

i = rand();

i = i%6 + 1;

switch( i )

{

case 1:

saikoro1();

break;

case 2:

saikoro2();

break;

case 3:

saikoro3();

break;

case 4:

saikoro4();

break;

case 5:

saikoro5();

break;

case 6:

saikoro6();

break;

default:

break; /* おまけ */

}

sleep( 1 );

}

return 0 ;

}

ptr07Sub.c

* arguemnts

#include <stdio.h>

void saikoro1( void )

{

printf("１の目が出た\n");

}

void saikoro2( void )

{

printf("２の目が出た\n");

}

void saikoro3( void )

{

printf("３の目が出た\n");

}

void saikoro4( void )

{

printf("４の目が出た\n");

}

void saikoro5( void )

{

printf("５の目が出た\n");

}

void saikoro6( void )

{

printf("６の目が出た\n");

}

void saikoroNG( void )

{

printf("変な目が出た\n");

}

ptr07a.c

* arguemnts

#include <stdlib.h>

void saikoro1( void );

void saikoro2( void );

void saikoro3( void );

void saikoro4( void );

void saikoro5( void );

void saikoro6( void );

void saikoroNG( void );

void (*saikoroN[])( void ) =

{saikoroNG,saikoro1,saikoro2,saikoro3,saikoro4,saikoro5,saikoro6};

int main( void )

{

int i;

srand( 1 );

while( 1 )

{

i = rand();

i = i%6 + 1;

saikoroN[i]();

sleep( 1 );

}

return 0 ;

}

ptrinc01.c

#include <stdio.h>

int main( void )

{

char *pc;

char c[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

pc=c;

printf("%c\n",*pc);

pc++;

printf("%c\n",*pc);

pc+=3;

printf("%c\n",*pc);

return 0 ;

}

ptrinc02.c

#include <stdio.h>

int main( void )

{

int *pi;

char c[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

pi=(int*)c;

printf("%c\n",*(char*)pi);

pi++;

printf("%c\n",*(char*)pi);

pi+=3;

printf("%c\n",*(char*)pi);

return 0 ;

}

ptrsub01.c

#include <stdio.h>

int main( void )

{

char *pc0;

char *pc1;

char *pc2;

char c[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

pc0=c;

pc1=pc0+sizeof(c);

pc2=pc1-pc0;

printf("pc1-pc0=%d, size of c=%d\n", pc2, sizeof(c));

return 0 ;

}

ptrsub02.c

#include <stdio.h>

int main( void )

{

int *pi0;

int *pi1;

int e;

int i[]={0,1,2,3,4,5,6,7,8,9};

pi0=i;

pi1=pi0+sizeof(i)/sizeof(i[0]);

e=pi1-pi0;

printf("pi1-pi0=%d, entry of i=%d, size of i=%d\n",

e, sizeof(i)/sizeof(i[0]), sizeof(i));

return 0 ;

}

ptrComp01.c

#include <stdio.h>

int main( void )

{

int i;

char *pc0;

char *pc1;

char a[10];

pc1=&a[5];

for(i = 0; i < 10; i++)

{

pc0=a+i;

if(pc0 < pc1)

printf("pc0 less than pc1\n");

else

if(pc0 == pc1)

printf("pc0 equal to pc1\n");

else

printf("pc0 greater than pc1\n");

}

return 0 ;

}

ptrArray01.c

#include <stdio.h>

int main( void )

{

int i;

int *pa;

int a[]={0,1,2,3,4};

printf("size of a=%d, size of pa=%d\n", sizeof(a), sizeof(pa));

pa=a;

for(i = 0; i < sizeof(a)/sizeof(a[0]); i++)

printf("&a[%d]=0x%08x, a+%d=0x%08x, &pa[%d]=0x%08x, pa+%d=0x%08x\n",

i, &a[i], i, a+i, i, &pa[i], i, pa+i);

return 0 ;

}

ptrArray02.c

#include <stdio.h>

int main( void )

{

int i;

char *pc;

char a='a';

char b='b';

char c='c';

char d='d';

char e='e';

char f='f';

char z='\0';

pc=&a;

printf("*pc=");

for(i = 0; pc[i]!='\0'; i++)

printf("%c",pc[i]);

printf("\n");

return 0 ;

}

ptrArray03.c

* Hiro KITAYAMA

#include <stdio.h>

int main( void )

{

int a[]={0,10,20,30,40};

int *pa;

pa=a;

printf("pa=0x%08x, *pa=%d\n", pa, *pa);

*pa++;

printf("pa=0x%08x, *pa=%d\n", pa, *pa);

*++pa;

printf("pa=0x%08x, *pa=%d\n", pa, *pa);

++*pa;

printf("pa=0x%08x, *pa=%d\n", pa, *pa);

return 0 ;

}

ptrArray04.c

* Hiro KITAYAMA

#include <stdio.h>

int main( void )

{

int i,j;

int *pa;

int a[3][5] =

{

{ 0, 1, 2, 3, 4},

{10,11,12,13,14},

{20,21,22,23,24}

};

pa=a;

for(i = 0; i<3; i++)

{

for(j = 0; j<5; j++)

printf("%2d ",pa[i][j]);

printf("\n");

}

return 0 ;

}

ptrArray04a.c

#include <stdio.h>

int main( void )

{

int i,j;

int (*pa)[5];

int a[3][5] =

{

{ 0, 1, 2, 3, 4},

{10,11,12,13,14},

{20,21,22,23,24}

};

pa=a;

for(i = 0; i<3; i++)

{

for(j = 0; j<5; j++)

printf("%2d ",pa[i][j]);

printf("\n");

}

return 0 ;

}

ptrArray04b.c

#include <stdio.h>

int main( void )

{

int i,j;

int *pa;

int a[3][5] =

{

{ 0, 1, 2, 3, 4},

{10,11,12,13,14},

{20,21,22,23,24}

};

for(i = 0; i<3; i++)

{

pa=a[i];

for(j = 0; j<5; j++)

printf("%2d ",pa[j]);

printf("\n");

}

return 0 ;

}

ptrArray04c.c

* Hiro KITAYAMA

#include <stdio.h>

int main( void )

{

int i,j;

int *pa[3];

int a[3][5] =

{

{ 0, 1, 2, 3, 4},

{10,11,12,13,14},

{20,21,22,23,24}

};

pa[0]=a[0];

pa[1]=a[1];

pa[2]=a[2];

for(i = 0; i<3; i++)

{

for(j = 0; j<5; j++)

printf("%2d ",pa[i][j]);

printf("\n");

}

return 0 ;

}

ptrPtr01.c

#include <stdio.h>

int main( void )

{

char c;

char *pc; /* ポインタ */

char **ppc; /* ポインタのポインタ */

c='A';

pc=&c;

/* ppc=&c; */ /* 警告あり */

ppc=&pc;

printf("c=%c, pc=0x%08x, *pc=%c, *ppc=0x%08x, **ppc=%c\n",

c, pc, *pc, *ppc, **ppc);

return 0 ;

}

ptrPtr02.c

#include <stdio.h>

int main( void )

{

char c;

char *p0c;

char **p1c;

char ***p2c;

char ****p3c;

char *****p4c;

char ******p5c;

char *******p6c;

char ********p7c;

char *********p8c;

char **********p9c;

char ***********p10c;

char ************p11c;

char *************p12c;

c='A';

p0c=&c;

p1c=&p0c;

p2c=&p1c;

p3c=&p2c;

p4c=&p3c;

p5c=&p4c;

p6c=&p5c;

p7c=&p6c;

p8c=&p7c;

p9c=&p8c;

p10c=&p9c;

p11c=&p10c;

p12c=&p11c;

printf("*************p12c=%c\n", *************p12c);

return 0 ;

}

ptrPtr03.c

#include <stdio.h>

void sub(int i, char **ppc)

{

printf("pc[%d]=%s\n", i, ppc[i]);

}

int main( void )

{

int i;

char *brother[]={"一郎","花子","次郎","桃子"};

for(i = 0; i<4; i++)

sub(i, brother);

return 0 ;

}

書籍に掲載されていないソース

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

ptrsub03.c

#include <stdio.h>

int main( void )

{

char *pc;

int *pi;

int e;

char c[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

pc=c;

pi=(int *)(pc+sizeof(c));

e=pi-pc;

printf("pi-pc=%d\n",e);

pi=(int *)c;

pc=(char *)(pi+sizeof(c));

e=pc-pi;

printf("pc-pi=%d\n",e);

return 0 ;

}

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

ptrinc01a.c

#include <stdio.h>

int main( void )

{

char *pc;

char c[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

pc=c;

printf("%c (pc=0x%08x)\n",*pc,pc);

pc++;

printf("%c (pc=0x%08x)\n",*pc,pc);

pc+=3;

printf("%c (pc=0x%08x)\n",*pc,pc);

return 0 ;

}

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

ptrinc02.c

#include <stdio.h>

int main( void )

{

int *pi;

char c[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

pi=(int*)c;

printf("%c\n",*(char*)pi);

pi++;

printf("%c\n",*(char*)pi);

pi+=3;

printf("%c\n",*(char*)pi);

return 0 ;

}

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

ptrinc02a.c

#include <stdio.h>

int main( void )

{

int *pi;

char c[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

pi=(int*)c;

printf("%c (pi=0x%08x)\n",*(char*)pi,pi);

pi++;

printf("%c (pi=0x%08x)\n",*(char*)pi,pi);

pi+=3;

printf("%c (pi=0x%08x)\n",*(char*)pi,pi);

return 0 ;

}