《C语言程序设计实例教程》课后习题答案

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1、#include^include#defineSTU_NUM30intMenu(void);voidReadScore(longnum[],floatscore[],intn)；voidAverSumofScore(floatscore[],intn);voidSortbyScore(longnum[],floatscore[],intn,int(*compare)(floata,floatb));intAscending(floata,floatb);intDescending(floata,floatb);voi

2、dSwapFloat(float*x,float*y);voidSwapLong(1ong*X,long*y);voidAsSortbyNum(1ongnum[],floatscore[],intn)；voidSearchbyNum(longnum[],floatscore[],intn);voidStatistcAnalysis(floatscore[],intn);voidPrintScore(longnum[],floatscore[],intn);intmain(){intitemSelected;intn二0;floatscore[STU.NU

3、M];longnum[STU_NUM];printf("Inputstudentnumber(n<%d):〃，STU_NUM);scanf("%d",&n);while(l){itemSelected=Menu();scanf("%d〃,&itemSe1ected)；switch(itemSciccted){case1:ReadScore(num,score,n);break;case2:AverSumofScore(score,n);break;case3:SortbyScore(num,score,n,Descending);printf("So

4、rtindescendingorderbyscore:，z);PrintScore(num,score,n)break;case4:SortbyScore(num,score,n,Ascending);printf("Sortinascendingorderbyscore:，z);PrintScore(num,score,n)break;case5:AsSortbyNum(num,score,n);printf("Sortinascendingorderbynumber:/z);PrintScore(num,score,n)break;cas

5、e6:SearchbyNum(num,score,n);break;case7:StatistcAnalysis(score,n);break;case8:PrintScore(num,score,n);break;case0:printf("Endofprogram!，z);exit(0);default:printf("Inputerror!〃)；}}return0;}intMenu(void){printf(，zMarmgementforStudents'scores/z);printf(z/l.Inputrecordz，);print

6、f(〃2・Caculatetotalandaveragescoreofcourse，z);printf(z/3.Sortindescendingorderbyscorez，);printf(，z4.Sortinascendingorderbyscore〃)；printf("5.Sortinascendingorderbynumberz，);printf(z，6.Searchbynumber，/);printf("7.Statisticanalysiszz);printf("8.Listrecord，z);printf("0.E

7、xit；printf("'PleaseInputyourchoice:z，);return0;}voidReadScore(longnum[],floatscore[],intn){inti;printf(z/Inputstudent/sIDandscore:，z);for(i=0;i

8、rintf(，zsum=%.Of,aver=%•2f〃，sum,n>0?su