[例8.13] 將例8.12測字符串的長度，改用字符指針方式完成

int StrLen(char *s)

{? int n=0;

? ?while(*s++)n++;

? ?return n;

}

main()

{ char str[]="China",*p;

int len;

p=str;

len=StrLen(p);

printf("%s的長度：%d\n",p,len(p));

}

[例9.12] 使用函數(shù)將一個字符串復(fù)制到另一個字符串。

void StrCopy(char *str1,char *str2)

{

while((*str1=*str2)!='\0')

{? ?str1++;? str2++;

}

}

main()

{ char s1[80],s2[]="abc";

StrCopy(s1,s2);

printf("復(fù)制之后的字符串：%s\n",s1);

}?

[例9.13] 改寫字符串復(fù)制函數(shù)。

Char *StrCopy(char *str1,char *str2)

{? char *p=str1;

? ?while((*str1=*str2)!='\0')

? ?{? ?str1++;? str2++;

? ?}

? ?return p;

}

main()

{? char s1[80],s2[]="China";

? ?printf("原字符串:%s\n",s2);

? ?printf("復(fù)制之后的字符串：%s\n", StrCopy(s1,s2));

}

[9.14]將若干字符串輸出。

main()

{ char *str[]={"windows","office","media","internet","outlook"};

int i;

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

printf("%s\n",str[i]);

}

[例9.15]使用多級指針輸出多個字符串

main()

{ char *str[]={"windows","office","media","internet","outlook"};

char **p;

for(p=str;p<str+5;p++)

printf("%s\n",*p);

}

例10.1 結(jié)構(gòu)體變量的初始化

struct STUDENT

{ int num;

char name[10];

char sex;

int age;

float score;

}a={1001,"LiMing",'M',21,90.5}; /* 全局結(jié)構(gòu)體變量 */

main()

{ /* 局部結(jié)構(gòu)體變量 */

struct STUDENT b={1002,"ZhaoLi",'F',20,93.0};

printf("學生a:%d,%s,%c,%d,%f\n",a.num,a.name,a.sex,a.age,a.score);

printf("學生b:%d,%s,%c,%d,%f\n",b.num,b.name,b.sex,a.age,b.score);

}

例10.2 結(jié)構(gòu)體數(shù)組

struct STUDENT

{ int num;

char name[10];

float score;

};

main()

{ struct STUDENT stud[3];

int i;

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

scanf("%d,%s,%f",&stud[i].num, stud[i].name, &stud[i].score);

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

printf("%d,%d,%s,%f\n",i,stud[i].num, stud[i].name, stud[i].score);

}

[10.3] 使用結(jié)構(gòu)體指針

struct STUDENT

{ int num;

char name[10];

float score;

};

main()

{ struct STUDENT a={1002,"ZhaoLi",93.0},*p;

p=&a;

printf("%d,%s,%f\n",a.num,a.name,a.score);

printf("%d,%s,%f\n",(*p).num,(*p).name, (*p).score);

printf("%d,%s,%f\n",p->num,p->name,p->score);

}