（信息技术基础第2版）第8章课后习题参考答案.docx

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1、第八章习题参考答案1)C2)B3)C4)B5)A6)A7)A8)B9)C10)B11)B12)A12)D13)D14)A15)*pma=*p16)efgh17)max(inta,intb)18)includevoidmain()voidinput(int*);voidmax_min_value(int*);voidoutput(int*);intnumber10;input(number);max_min_value(number);output(number);)voidinput(int*number)iti；printf(,input10numbers:)；for(i=0;i10;i+)

2、scanf(%d,8numberi);voidmax_min_value(int*number)int*maxz*minz*p,temp;max=min=number;for(p=number+l;p*max)max=p;elseif(*p*min)min=p;temp=numberO;numberO=*min;*min=temp;if(max=number)max=min;temp=number9;number9=*max;*max=temp;)voidoutput(int*number)int*p;printf(Nowztheyare:)；for(p=number;pnumber+10;p

3、+)printf(%d,p);printf(n);)19)#includevoidmain()intlength(char*p);intlen;charstr20;printf(inputstring:,);scanf(%s,str);Ien=Iengthfstr);printf(Thelengthofstringis%d.n,len);)intlength(char*p)intn;n=0;while(*p=,0)+;P+；)return(n);)20)#includevoidmain()voidavsco(float*,float*);voidavcourl(char(*)10zfloat*

4、);voidfali2(charcourse510zintnum,float*pscorezfloataver4);voidgood(charcourse510Jntnum4,float*pscore,floataver4);intij,*pnum,num4;floatscore45,aver4,*pscore,*paver;charcourse510,(*pcourse)10;printf(inputcourse:n);pcourse=course;for(i=0;i5;i+)scanf(%szcoursei);printf(inputNO.andscores:n);printf(,NO,)

5、;for(i=0;i5;i+)printf(,%szcoursei);printf(,n);pscore=8tscore00;pnum=&num0;for(i=0;i4;i+)scanf(%dzpnum+i);for(j=0;j5;j+)scanf(%f,pscore+5*i+j);)paver=&aver0;printf(nn);avsco(pscorezpaver);avcourl(pcoursezpscore);printf(,nn);fali2(pcourse,pnumzpscorezpaver);printf(nn);good(pcourse,pnum,pscore,paver);)

6、void avsco(float *pscorezfloat * paver)it ij;float sumzaverage;for (i=0;i4;i+)sum=0.0;for (j=0;j5;j+)sum=sum+(*(pscore+5*i+j);average=sum5;*(paver+i)=average;/求出每个学生的平均成绩/求出第一门课的平均成绩/找出2门课不及格的学生/找出成绩好的学生/求每个学生的平均成绩的函数累计每个学生的各科成绩计算平均成绩)voidavcourl(char(*pcourse)10zfloat*pscore)/求第一课程的平均成绩的函数inti;floa

7、tsumzaveragel;sum=0.0;for(i=0;i4;i+)sum=sum+(*(pscore+5*i);累计每个学生的得分averagel=sum/4;计算平均成绩printf(coursel:%saveragescore:%7.2fn,*pcourse,averagel);)voidfali2(charcourse510Jntnumzfloat*pscore,floataver4)/找两门以上课程不及格的学生的函数intij,kjabel;printf(=Studentwhoisfailintwocourses=n);printf(NO.);for(i=0;i5;i+)prin

8、tf(%lls,coursei);printf(averagen);for(i=0;i4;i+)label=O;for(j=O;j5;j+)if(*(pscore+5*i+j)=2)printf(%d,numi);for(k=O;k5;k+)printf(%11.2f,*(pscore+5*i+k);printf(,%11.2fn,averi);)voidgood(charcourse510Jntnum4,float*pscore,floataver4)/找成绩优秀学生(各门85以上或平均90分以上)的函数itij,k,n;printf(=Studentswhosescoreisgood=n);printf(NO.);for(i=0;i5;i+)printf(%lls,coursei);printf(averagen);for(i=0;i4;i+)n=0;for(j=0;j85.0)n+;if(n=5)11(averi=90)printf(%dznumi);for(k=0;k5;k+)printf(%11.2f,(pscore+5*i+k);printf(%11.2fn,averi);)