8、
{
scanf("%d %s %f %f %f",&stu[i].num,&stu[i].name,&stu[i].score[0],&stu[i].score[1],&stu[i].score[2]);
stu[i].ave=(stu[i].score[0]+stu[i].score[1]+stu[i].score[2])/3;
average+=stu[i].ave/N;
}
for(i=1;istu[m].ave)
m=i;
printf("三門課程總平均成績(jī)?yōu)?%5.1f\n成績(jī)最高的學(xué)生是:\
9、n學(xué)號(hào):%d\n姓名:%s\n三門課成績(jī):%5.1f,%5.1f,%5.1f\n平均成績(jī):%6.2f\n",average,stu[m].num,stu[m].name,stu[m].score[0],stu[m].score[1],stu[m].score[2],stu[m].ave);
}
*/
/*
#define N 13 //定義人數(shù)
struct a
{
int num; //原來(lái)的序號(hào)
int count; //報(bào)數(shù)數(shù)目
struct a *next;
};
10、
int main()
{
int i,j=1;
struct a *p1,*p2,b[N];
p1=b;
for(i=0;inext!=p1) //p1的next成員指向自己時(shí)表明只剩最后一
11、個(gè)人
{
p1->count=j; //報(bào)數(shù)
if(j==2)
p2=p1; //p2的作用是標(biāo)記報(bào)數(shù)為2的人
if(j==3)
{
j=1;
p2->next=p1->next;
//將報(bào)數(shù)為3的next成員賦值給上一個(gè)報(bào)數(shù)為2的next成員，使之指向下一個(gè)報(bào)數(shù)為1的//成員;
}
else
j+=1;
p1=p1->next; //p1指向下一個(gè)count不為3的成員
}
printf("最后留在圈子的人原來(lái)的序號(hào)為:%d\n",p
12、1->num);
}
*/
/*
# define L sizeof(struct student)
struct student
{
long num;
float score;
struct student *next;
};
int n;
struct student *creat(void) //生成單向動(dòng)態(tài)鏈表的函數(shù)
{
struct student *head;
struct student *p1,*p2;
n=0;
p1=p2=malloc(L);
scanf("%ld,%f",&p1->
13、num,&p1->score);
head=NULL;
while(p1->num!=0)
{
n+=1;
if(n==1)head=p1;
else p2->next=p1;
p2=p1;
p1=malloc(L);
scanf("%ld,%f",&p1->num,&p1->score);
}
p2->next=NULL;
return head;
}
void print(struct student *head) //輸出鏈表的函數(shù)
{
struct student *p=head;
prin
14、tf("\nnow,these records are:\n");
while(p!=NULL)
{
printf("%ld %5.1f\n",p->num,p->score);
p=p->next;
}
}
struct student *del1(struct student *head,long num) //刪除指定節(jié)點(diǎn)的函數(shù)，方法一，指定刪除節(jié)點(diǎn)的數(shù)據(jù)
{
struct student *p1,*p2;
p1=head;
if(p1->num==num)
return head=p1->next;
else
{
15、 while(p1->num!=num)
{
p2=p1;
p1=p1->next;
}
p2->next=p1->next;
p1->next=NULL;
return head;
}
}
struct student *del2(struct student *head,int n) //方法二，指定刪除節(jié)點(diǎn)序號(hào)
{
struct student *p1,*p2;
int i=1;
p1=head;
if(i==n)
return head=p1->next;
else
{
16、
while(i++next;
}
p2->next=p1->next;
p1->next=NULL;
return head;
}
}
int main()
{
struct student *head;
long num; //int n;
head=creat();
print(head);
printf("\n輸入要?jiǎng)h除學(xué)生的學(xué)號(hào):"); //printf("\n輸入
17、要?jiǎng)h除節(jié)點(diǎn)序號(hào):");
scanf("%ld",&num); //scanf("%d",&n);
head=del1(head,num); //head=del2(head,n);
print(head);
}
*/
/*
# define L sizeof(struct student)
struct student
{
long num;
float score;
struct student *next;
};
int n;
struct student
18、*creat(void) //生成單向動(dòng)態(tài)鏈表的函數(shù)
{
struct student *head;
struct student *p1,*p2;
n=0;
p1=p2=malloc(L);
scanf("%ld,%f",&p1->num,&p1->score);
head=NULL;
while(p1->num!=0)
{
n+=1;
if(n==1)head=p1;
else p2->next=p1;
p2=p1;
p1=malloc(L);
scanf("%ld,%f",&p1-
19、>num,&p1->score);
}
p2->next=NULL;
return head;
}
void print(struct student *head) //輸出鏈表的函數(shù)
{
struct student *p=head;
printf("\nnow,these records are:\n");
while(p!=NULL)
{
printf("%ld %5.1f\n",p->num,p->score);
p=p->next;
}
}
struct student *del1(struct studen
20、t *head,long num)
//刪除指定節(jié)點(diǎn)的函數(shù)，num為指定刪除節(jié)點(diǎn)的數(shù)據(jù)
{
struct student *p1,*p2;
p1=head;
if(p1->num==num)
return head=p1->next;
else
{
while(p1->num!=num)
{
p2=p1;
p1=p1->next;
}
p2->next=p1->next;
p1->next=NULL;
return head;
}
}
struct student *
21、insert(struct student *head,struct student *p,int n)
//插入節(jié)點(diǎn)的函數(shù),n為新節(jié)點(diǎn)序號(hào)
{
struct student *p1,*p2;
int i=1;
p1=head;
if(i==n)
{
p->next=p1;
head=p;
}
else
{
while(i++next;
}
p2->next=p;
p->next=p1;
}
return head;
}
22、
int main()
{
struct student *head,*p;
int n;
long num;
head=creat();
print(head);
printf("\n輸入要?jiǎng)h除學(xué)生的學(xué)號(hào):");
scanf("%d",&num);
head=del(head,num);
print(head);
p=malloc(L);
//為插入的新節(jié)點(diǎn)開(kāi)辟單元，否則p
23、的值不確定
printf("\n輸入要添加學(xué)生的學(xué)號(hào),成績(jī),序號(hào):");
scanf("%ld,%f,%d",&p->num,&p->score,&n);
head=insert(head,p,n);
print(head);
}
*/
/*
# define L sizeof(struct student)
struct student
{
int num;
float score;
struct student *next;
};
int n;
struct student *creat(void) //生成單向動(dòng)態(tài)鏈
24、表的函數(shù)
{
struct student *head;
struct student *p1,*p2;
n=0;
p1=p2=malloc(L);
scanf("%d %f",&p1->num,&p1->score);
head=NULL;
while(p1->num!=0)
{
n+=1;
if(n==1)head=p1;
else p2->next=p1;
p2=p1;
p1=malloc(L);
scanf("%d %f",&p1->num,&p1->score);
}
p2->next=NULL
25、;
return head;
}
void print(struct student *head) //輸出鏈表的函數(shù)
{
struct student *p=head;
printf("\nnow,these records are:\n");
while(p!=NULL)
{
printf("%d %5.1f\n",p->num,p->score);
p=p->next;
}
}
struct student *sort(struct student *head) //建立鏈表排序函數(shù)
{
stru
26、ct student *p1,*p2;
int t;
float s;
p1=head;
p2=p1->next;
while(p1&&p2)
//不能寫(xiě)為p1，否則當(dāng)p1指向最后一個(gè)結(jié)點(diǎn)時(shí)，最后一句循環(huán)語(yǔ)句出問(wèn)題
{
while(p2)
{
if(p1->num>p2->num)
{
t=p1->num;
s=p1->score;
p1->num=p2->num;
p1->score=p2->score;
p2->num=t;
p2->
27、score=s;
p2=p2->next;
}
else //不能省略else語(yǔ)句，否則遇到p1->numnum時(shí)無(wú)限循環(huán)
p2=p2->next;
}
p1=p1->next;
p2=p1->next;
}
return head;
}
struct student *cat(struct student *head1,struct student *head2) //建立鏈表合并函數(shù)
{
struct student *p,*t;
p=head1;
while(p)
{
28、
t=p; //循環(huán)結(jié)束時(shí)t將指向a鏈表的最后一個(gè)指針
p=p->next;
}
t->next=head2;
return head1;
}
int main()
{
struct student *a,*b;
printf("輸入鏈表a:\n");
a=creat();
printf("輸入鏈表b:\n");
b=creat();
print(sort(cat(a,b)));
}
*/
/*測(cè)試數(shù)據(jù)
10018 89
10016 64
10014 81
10012 94
0 0
100
29、17 67
10015 68
10013 76
10011 85
0 0
*/
/*
# define L sizeof(struct student)
struct student
{
long num;
char name[20];
struct student *next;
};
int n;
struct student *creat(void) //生成單向動(dòng)態(tài)鏈表的函數(shù)
{
struct student *head;
struct student *p1,*p2;
n=0;
p1=p2=ma
30、lloc(L);
scanf("%ld %s",&p1->num,p1->name);
head=NULL;
while(p1->num!=0)
{
n+=1;
if(n==1)head=p1;
else p2->next=p1;
p2=p1;
p1=malloc(L);
scanf("%ld %s",&p1->num,p1->name);
}
p2->next=NULL;
return head;
}
void print(struct student *head) //輸出鏈表的函數(shù)
{
str
31、uct student *p=head;
printf("\n現(xiàn)在鏈表a為:\n");
while(p!=NULL)
{
printf("%ld %s\n",p->num,p->name);
p=p->next;
}
}
struct student *delsame(struct student *a,struct student *b) //從a中刪去與b相同學(xué)號(hào)的節(jié)點(diǎn)
{
struct student *p1,*p2,*p3;
long num;
int s,k=0;
p3=p1=a;p2=b;
while(p1)
32、{
s=0;
num=p1->num;
while(p2)
{
if(p2->num!=num)
p2=p2->next;
else
{
s=1;
break;
}
}
if(s==1)
p3->next=p1->next; //若a最后一個(gè)相同，p3的指針數(shù)據(jù)為null
else
{
p3=p1; //每找到一個(gè)與b不相等的指針時(shí)，p3指向它
k+=1; //每找到一個(gè)與b不相等的指針時(shí)，k累加1
if(
33、k==1) //找到第一個(gè)與b不相等的指針時(shí)，將頭指針賦值給a
a=p1;
}
p1=p1->next; //p1指向下一個(gè)指針
p2=b; //p2重新指向鏈表b開(kāi)頭
}
if(k==0) //k=0表明a,b鏈表相同，返回null
return a=NULL;
else
return a;
}
int main()
{
struct student *a,*b;
printf("輸入鏈表a:\n");
a=creat();
printf("輸入鏈表b:\n")
34、;
b=creat();
a=delsame(a,b);
print(a);
}
*/
/*
#define L sizeof(struct inf)
struct inf
{
long num;
int age;
char name[20];
char sex;
struct inf *next;
};
int n;
struct inf *creat(void) //生成單向動(dòng)態(tài)鏈表的函數(shù)
{
struct inf *head;
struct inf *p1,*p2;
n=0;
p1=
35、p2=malloc(L);
scanf("%ld %s %c %d",&p1->num,p1->name,&p1->sex,&p1->age);
head=NULL;
while(p1->num!=0)
{
n+=1;
if(n==1)head=p1;
else p2->next=p1;
p2=p1;
p1=malloc(L);
scanf("%ld %s %c %d",&p1->num,p1->name,&p1->sex,&p1->age);
}
p2->next=NULL;
return head;
}
void prin
36、t(struct inf *head) //輸出鏈表的函數(shù)
{
struct inf *p=head;
printf("\nnow,these inf are:\n");
while(p!=NULL)
{
printf("%ld %s %c %d\n",p->num,p->name,p->sex,p->age);
p=p->next;
}
}
struct inf *delage(struct inf *head,int a) //刪除指定年齡節(jié)點(diǎn)的函數(shù)
{
struct inf *p1,*p2;
p
37、1=head;
while(p1->age==a)
p1=p1->next;
head=p1;
p2=p1;
while(p1->next!=NULL)
{
if(p1->age==a)
{
p2->next=p1->next;
p1=p1->next;
}
else
{
p2=p1;
p1=p1->next;
}
}
if(p1->age==a)
p2->next=NULL;
return head;
}
int main()
{
struct inf *head;
38、int a;
head=creat();
print(head);
printf("\n輸入要?jiǎng)h除的年齡:");
scanf("%d",&a);
head=delage(head,a);
print(head);
}
*/
/*測(cè)試數(shù)據(jù)
10009 chen f 24
10010 wang m 28
10011 li f 28
10012 zhao m 28
10013 chen f 24
10014 wei m 25
10015 yang f 26
10016 tian m 28
10016 tian m 28
10017 mei f 27
10018 liu m 28
10019 chen f 24
*/
c程序設(shè)計(jì)第四版譚浩強(qiáng)第九章答案.docx
