---

char01.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

 

/* main */

int main( void )

{

        char a[100];

 

        a="abc";        /* compile error */

 

        printf("%s",a);

 

        return 0 ;

}

---

char01a.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

 

int main( void )

{

        char a[100];

 

        strcpy(a,"abc");        /* a="abc";     */

 

        printf("%s",a);

 

        return 0 ;

}

---

char02.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

#include <string.h>

 

int main( void )

{

        char a[]="this is a pen.";      /* initial valie */

        puts(a);

 

        strcpy(a,"yes it is."); /* copy it */

        puts(a);

 

        return 0 ;

}

---

char02a.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

#include <string.h>

 

int main( void )

{

        char *a="this is a pen.";       /* initial value */

        puts(a);

 

        strcpy(a,"yes it is."); /* copy it */

        puts(a);

 

        return 0 ;

}

---

char03.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

#include <string.h>

 

int main( void )

{

        char a[]="this is a pen.";      /* initialize */

        puts(a);

 

        strcpy(a,"yes it is.yes it is.yes it is.");     /* copy it */

        puts(a);

 

        return 0 ;

}

---

char03a.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

#include <string.h>

 

void sub(void)

{

        char *a="this is a pen.";       /* initialize */

        puts(a);

 

        strcpy(a,"yes it is.");

        puts(a);

}

 

int main( void )

{

        sub();

        sub();

 

        return 0 ;

}

---

char03b.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

#include <string.h>

 

void sub(void)

{

        char a[256]="this is a pen.";   /* initialize */

        puts(a);

 

        strcpy(a,"yes it is.");

        puts(a);

}

 

int main( void )

{

        sub();

        sub();

 

        return 0 ;

}

---

charstr01.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

 

int main( void )

{

        char a[3]="abc";

 

        printf("%s",a);

 

        return 0 ;

}

---

charstr02.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

 

int main( void )

{

        char a[4]="abc";

 

        printf("%s",a);

 

        return 0 ;

}

---

charstr02a.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

 

int main( void )

{

        char a[]="abc";

 

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

 

        return 0 ;

}

---

charstr03.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

#include <string.h>

 

int main( void )

{

        char a[256]="a漢字bc";

        int len;

 

        len = strlen(a);

        printf("「%s」=%d文字か？",a,len);

 

        return 0 ;

}

---

charstr04.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

#include <string.h>

 

int main( void )

{

        char  a[256]="abcdef";

        char* b="abcdef";

        char  c[]="abcdef";

 

        printf("a=%dバイト\n",sizeof a );

        printf("b=%dバイト\n",sizeof b );

        printf("c=%dバイト\n",sizeof c );

 

        return 0 ;

}

---

charstr05.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

#include <string.h>

 

int main( void )

{

        char  a[256]="abcdef";

        char* b="abcdef";

        char  c[]="abcdef";

 

        printf("aの長さ=%d\n",strlen(a));

        printf("bの長さ=%d\n",strlen(b) );

        printf("cの長さ=%d\n",strlen(c));

 

        return 0 ;

}

---

strcmp01.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

 

int main( void )

{

        char *a="abc";

        char *b="abc";

 

        if(a==b)

                printf("same a as b.\n");

        else

                printf("not same a as b.\n");

 

        return 0 ;

}

---

strcmp01a.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

 

int main( void )

{

        const char *a="abc";

        char *b="abc";

 

        *b='E';

 

        puts(a);

        puts(b);

 

        if(a==b)

                printf("same a as b.\n");

        else

                printf("not same a as b.\n");

 

        return 0 ;

}

---

strcmp01b.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

 

int main( void )

{

        char a[]="abc";

        char b[]="abc";

 

        if(a==b)

                printf("same a as b.\n");

        else

                printf("not same a as b.\n");

 

        return 0 ;

}

---

strcmp02.c

/*

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

#include <string.h>

 

int main( void )

{

        char *a="abc";

        char *b="abc";

 

        if(0==strcmp(a,b))

                printf("same a as b.\n");

        else

                printf("not same a as b.\n");

 

        return 0 ;

}

---

toupper01.c

/*

 * bはエラーになるときもある．

 *

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

#include <string.h>

#include <ctype.h>

 

int main( void )

{

        char  a[256]="abcdef";

        char* b="abcdef";

 

        a[0]=toupper(a[0]);

        b[0]=toupper(b[0]);

       

        printf("a=%s\n",a);

        printf("b=%s\n",b);

 

        return 0 ;

}

---

toupper01a.c

/*

 * bはエラーになるときもある．

 *

 * (c)Copyright Spacesoft corp., 2006 All rights reserved.

 *

 */

#include <stdio.h>

#include <string.h>

#include <ctype.h>

 

int main( void )

{

        const char  a[256]="abcdef";

        const char* b="abcdef";

 

        a[0]=toupper(a[0]);

        b[0]=toupper(b[0]);

       

        printf("a=%s\n",a);

        printf("b=%s\n",b);

 

        return 0 ;

}