C语言课后题答案(北邮出版社)

1、1、li45300.0chang30200.0chang2、#include<stdio.h>structstudentscharsid100;charname100;floatscore3;student;voidmain()inti;floatj;printf("nPleaseinputsid:");scanf("%s",student.sid);printf("nPleaseinputname:");scanf("%s",);printf("nPleaseinpu

2、t3score:(like1,1,1)");/*输入逗号隔开*/scanf("%f,%f,%f",&student.score0,&student.score1,&student.score2);printf("nsid=%s",student.sid);printf("nname=%s",);j=(student.score0+student.score1+student.score2)/3.0;printf("naverage=%.2f",j);getc

3、h();3、#include<stdio.h>#include<string.h>#defineFsizeof(student)#defineNULL0typedefstructscoresintenglish;intmath;intc_language;intall;TP;typedefstructstudentscharsid15;charname15;TPscore;structstudents*next;student;student*input()student*head,*p1,*p2;intn=0;charch;clrscr();head=(student

4、*)malloc(F);head->next=NULL;don+;printf("nnPleaseinput%dstudentmessage:nn”,n);printf("t%dstudentsid:”,n);p1=(student*)malloc(F);p1->next=NULL;scanf("%s",p1->sid);printf("nt%dstudentname:”,n);scanf("%s",p1->name);printf("nt%dstudentscores(englesh,ma

5、th,c_language):",n);scanf("%d,%d,%d",&p1->score.english,&p1->score.math,&p1->score.c_language);p1->score.all=p1->score.english+p1->score.math+p1->score.c_language;if(n=1)head->next=p1;p2=p1;elsep2->next=p1;p2=p1;printf("nntttContinueorback(p

6、ressy/n):");ch=getch();while(ch='y'|ch='Y');returnhead;voidaverage1(student*head)student*p;intj;clrscr();p=head->next;while(p)j=p->score.all/3;printf("nnname:%staverage:%d",p->name,j);p=p->next;printf("nnnPressenykeyreturn.");getch();voidaverage2(

7、student*head)student*p;intn=0,temp1=0,temp2=0,temp3=0;p=head->next;while(p)temp1+=p->score.english;temp2+=p->score.math;temp3+=p->score.c_language;p=p->next;n+;printf("nnaverageenglishis:%dnaveragemathis:%dnaveragec_languageis:%dt",temp1/n,temp2/n,temp3/n);student*sort(stude

8、nt*head)student*head1,*p,*q,*r;inttemp1=0,temp2=0,temp3=0,temp4;chars15,n15;head仁head;for(p=head1->next;p->next!=NULL;p=p->next)r=p;for(q=p->next;q;q=q_>next)if(q->score.all>r->score.all)r=q;if(r!=p)strcpy(s,p->sid);strcpy(n,p_>name);temp1=p->score.english;temp2=p-&g

9、t;score.math;temp3=p->score.c_language;temp4=p->score.all;strcpy(p->sid,r->sid);strcpy(p->name,r->name);p->score.english=r->score.english;p->score.math=r->score.math;p->score.c_language=r->score.c_language;p->score.all=r->score.all;strcpy(r->sid,s);strcpy

10、(r->name,n);r->score.english=temp1;r->score.math=temp2;r->score.c_language=temp3;r->score.all=temp4;returnhead1;voidoutput(student*head)student*head2,*p;inti=1;clrscr();head2=sort(head);for(p=head2->next;p!=NULL;p=p->next)printf("nnname:%stsid:%stenglish:%dtmath:%dtc_langua

11、ge:%dtaverage:%dtmingci:%d",p->name,p->sid,p->score.english,p->score.math,p->score.c_language,p->score.all/3,i+);average2(head);printf("nnnttPressenykeyback.");getch();voidmain()student*head,*p1,*p2;inti=0,j=1;head=input();doclrscr();printf("nn(1):average1.nn(2)

12、:average2.nn(3):sort.nn(4):output.nnnPleasechoose:");scanf("%d",&i);switch(i)case1:average1(head);break;case2:clrscr();average2(head);printf("nnnPressenykeyretuen.");getch();break;case3:clrscr();p1=sort(head);for(p2=p1->next;p2!=NULL;p2=p2->next)printf("nttnam

13、e:%stmingci:%d",p2->name,j+);printf("nnnPressenykeyback.");getch();break;case4:output(head);break;default:printf("nYourchooseisnotright.");break;while(i!=-1);4、#include<stdio.h>#include<string.h>#defineNULL0#defineFsizeof(worker)typedefstructworkcharsid15;char

14、name15;intmoney;structwork*next;worker;intmin=0,max=0;chara15,b15;worker*input()worker*head,*p,*q;intn=0;charch;head=(worker*)malloc(F);head->next=0;don+;p=(worker*)malloc(F);p->next=0;printf("nntPleaseinput%dworkermessage:",n);printf("n%dworkersid:”,n);scanf("%s",p-&g

15、t;sid);printf("n%dworkername:”,n);scanf("%s",p->name);printf("n%dworkermoney:",n);scanf("%d",&p->money);if(n=1)head->next=p;q=p;max=p->money;strcpy(a,p->name);min=p_>money;strcpy(b,p->name);elseq_>next=p;if(p->money>max)max=p->m

16、oney;strcpy(a,p->name);if(p->money<min)min=p_>money;strcpy(b,p->name);q=p;printf("ntty/n");ch=getch();while(ch='y'|ch='Y');returnhead;voidoutput()clrscr();printf("nThemaxmoneyis:%dttnameis:%snn",max,a);printf("nTheminmoneyis:%dttnameis:%s"

17、,min,b);voidmain()input();output();getch();5、6、#include"stdio.h"#defineFsizeof(stu)#defineNULL0typedefstructstudentintsid;intaverage;structstudent*next;stu;stu*head;stu*create()stu*p1,*p2;intn=0;charch;head=(stu*)malloc(F);head->next=NULL;donn”,n);");n+;printf("nnPleaseinput%d

18、studentmessage:printf("t%dstudentsid:”,n);p1=(stu*)malloc(F);p1->next=NULL;scanf("%d",&p1->sid);printf("nt%dstudentaverage:",n);scanf("%d",&p1->average);if(n=1)head->next=p1;p2=p1;elsep2->next=p1;p2=p1;printf("nntttContinueorback(pressy/

19、n):ch=getch();while(ch='y'|ch='Y');returnhead;stu*select(stu*head,intx)stu*s;s=head->next;while(s)if(s->sid=x)break;s=s->next;returns;stu*insert(stu*head,intx,inty)stu*p,*r,*q;clrscr();p=head->next;r=(stu*)malloc(sizeof(stu);r->sid=x;r->average=y;if(p=NULL)/*如果插入空表*

20、/p=r;r->next=NULL;printf("ninsertsuccess!");elsewhile(x>p->sid)/*找到插入的位置，按学号大小。(找到位置或者到了表尾都会跳出循环)*/if(p->next=NULL)break;p=p->next;if(x<p->sid)/*插到中间位置*/r->sid=p->sid;r->average=p_>average;p->sid=x;p->average=y;r->next=p->next;p_>next=r;print

21、f("ninsertsuccess!");elseif(x=p->sid)/*学号不能相同*/printf("nError->yourinputthissamesid.");else/*插到末尾*/p_>next=r;r->next=NULL;printf("ninsertsuccess!");returnhead;stu*get(stu*head,intn)/*得到位置为n的结点的指针*/stu*p;inti;p=head->next;if(n=0)returnhead;elsefor(i=1;i<

22、;n;i+)p=p->next;returnp;stu*delete(stu*head,intsid)stu*p,*q;inttemp=0,i=0;p=head->next;if(!p)printf("nlistisempty.pressenykeyback.");getch();returnhead;/*表空*/elsewhile(p)/*查找学号为sid的结点的指针*/i+;/*标记学号为sid的结点的位置*/if(p->sid=sid)temp=1;break;/*temp=1标记找到了*/p=p->next;if(temp=1)/*如果有学号

23、为sid的结点*/q=get(head,i-1);/*得到sid的前一个结点的指针*/q_>next=p->next;free(p);printf("nndeletesucess!");returnhead;else/*没有找到*/printf("nnNOthisdata.'n");returnhead;voidprint(stu*head)stu*p;p=head->next;if(!p)printf("nlistisempty.pressenykeyback.");getch();while(p)prin

24、tf("n%d:t%d",p->sid,p->average);p=p->next;main()stu*p1,*p2;charch1;intn,i=0,j=0;head=create();doclrscr();printf("n1.insert.");printf("n2.select.");printf("n3.delect.");printf("n4.printlist.");printf("n5.EXIT");printf("nchoice(

25、1-5)");ch1=getch();switch(ch1)case'1':clrscr();printf("npleaseinputinsertsid.andaverage(like1,1):");scanf("%d,%d",&i,&j);head=insert(head,i,j);printf("nnnPressenykeyback.");getch();break;case2:clrscr();printf("ninputyouwanttoseletesid:");s

26、canf("%d",&n);p1=select(head,n);if(p1)printf("nsid:%dtaverage:%d",p1->sid,p1->average);elseprintf("nNothisdata.");printf("nnnPressenykeyback.");getch();break;case3:clrscr();printf("nPleaseinputyouwantdeletesid:");scanf("%d",&n

27、);head=delete(head,n);printf("nnnPressenykeyback.");getch();break;case'4':clrscr();printf("Allinformation:");print(head);printf("nnnPressenykeyback.");getch();break;case'5':return;default:printf("nnYourenterisnotright.pressenykeyback.");getch();while(n);7、#include<stdio.h>#defineFsizeof(L)typedefstructlistchardata;structlist*next;L；