第8章 习题参考答案.doc 6页

'《C语言程序设计》习题参考答案第8章习题参考答案1．判断题：123456√×××√√2．选择题12345678DDDCDADD3．程序阅读（1）2，4，6，8，10，。（2）10987654321（3）Shen。（4）18。（5）484．程序填空（1）p->next!=NULLp->infop=p->next;（2）p1->next!=NULLp0->next=p1;p0->next=NULL;（3）s[k].avers[k].aver>s[maxsub].avermaxsub=k（4）headn++p->next5．编程题（1）structcomplx{intreal;intim;};main(){structcomplxc1,c2,c3;scanf("%d+%di",&c1.real,&c1.im);scanf("%d+%di",&c2.real,&c2.im);c3.real=c1.real*c2.real-c1.im*c2.im;c3.im=c1.real*c2.im+c1.im*c2.real;printf("(%d+%di)*(%d+%di)=%d+%di",c1.real,c1.im,c2.real,c2.im,c3.real,c3.im);getch();}（2）#include#includemain()#defineN10structstudent 《C语言程序设计》习题参考答案{longnum;charname[10];floatscore[3];floatave;};main(){voidinput(structstudents[],intn);/*输入n个学生数据*/floataverage(structstudents[],intn);/*计算第n个学生的平均成绩*/intmax(structstudents[],intn);/*计算n个学生中哪个学生的平均成绩最高*/structstudents[N];inti,m;floata=0;/*总平均成绩*/input(s,N);for(i=0;is[m].ave)m=i;return(m);}（3）structdate{intyear;intmonth;intday;};intdays(structdated){intn,t;if(d.year%4==0&&d.year%100!=0||d.year%400==0)t=29;elset=28;switch(d.month){case1:n=d.day;break;case2:n=d.day+31;break;case3:n=d.day+31+t;break;case4:n=d.day+31+t+31;break;case5:n=d.day+31+t+31+30;break;case6:n=d.day+31+t+31+30+31;break;case7:n=d.day+31+t+31+30+31+30;break;case8:n=d.day+31+t+31+30+31+30+31;break;case9:n=d.day+31+t+31+30+31+30+31+31;break;case10:n=d.day+31+t+31+30+31+30+31+31+30;break;case11:n=d.day+31+t+31+30+31+30+31+31+30+31;break;case12:n=d.day+31+t+31+30+31+30+31+31+30+31+30;}return(n);} 《C语言程序设计》习题参考答案main(){structdated={2006,3,15};printf("%d",days(d));getch();}（4）structks{intreg;char*name;charsex;char*birthday;intscore[6];};structksinput(){structkss;inti,sum=0;printf("register:");scanf("%d",&s.reg);printf("name:");scanf("%s",s.name);printf("sex:");scanf("%c",&s.sex);printf("birthday:");scanf("%s",s.birthday);for(i=0;i<5;i++){printf("score-%d:",i+1);scanf("%d",&s.score[i]);sum=sum+s.score[i];}s.score[5]=sum;return(s);}voidprint(structkss){inti;printf("register:%dn",s.reg);printf("name:%sn",s.name);printf("sex:%cn",s.sex);printf("birthday:%sn",s.birthday);for(i=0;i<5;i++)printf("score-%d:%dn",i+1,s.score[i]);printf("sum:%dn",s.score[5]);getch();}structkssearch(structkss[],intn){inti,p=0;for(i=1;is[p].score[5])p=i;return(s[p]);} 《C语言程序设计》习题参考答案voidsort(structkss[],intn){inti,j,p;structkst;for(i=0;inum);printf("Name:");scanf("%s",p1->name);printf("Sex:");scanf("%c",&p1->sex);printf("Age:");scanf("%d",&p1->age);if(i==1)head=p1;elsep2->next=p1;p2=p1;}p2->next=NULL;return(head);}voidprint(structstudent*head){structstudent*p;p=head;printf("NumberNameSexAgen");while(p!=NULL){printf("%ld%10s%c%d",p->num,p->name,p->sex,p->age);p=p->next;}}（6）structstudent*delete(structstudent*head,intage){structstudent*p1,*p2;p1=head;while(p1!=NULL){if(p1->age==age){if(p1==head)head=p1->next;elsep2->next=p1->next;free(p1);}p2=p1;p1=p1->next;}return(head);}'