C语言程序设计部分习题及例题参考程序

题及例题参考程序《C语言程序设计》部分例题及课后习题参考程序≥10<10<0y={≥10<10<0include<>intmain(){printfinputxscanf("%f",&x);if(x>=10)y=2*x+3;y=4*x;y=5*x-6;printfy2f\n",y);}等级分，转换方法如下：90以上(大于或等于include<>intmain(){printf("inputascore:");fscore{printf("invalidscoreinput\n");nkE}e{rankA;break;rankBbreakrankCbreakrankDbreak}printff:%c\n",score,rank);urn}形。include<>intmain(){printf("inputa,b,c:");canffffabcif(a>0&&b>0&&c>0&&a+b>c&&a+c>b&&b+c>a)printf("(%.2f,%.2f,%.2f)能围成三角形\n",a,b,c);printf("(%.2f,%,%.2f)不能围成三角形\n",a,b,c);}.编程实现将从键盘输入的一个正整数逆序输出，如输入1234，输出3421include<>intmain(){intn;printf("inputanumber:");{printf"%d",n%10);enurn}cludeintmain){intns1,i;printfinputanumber);iniprintf("%d!=%d\n",n,s);urn}include<>intmain(){intcnt=0;printf("inputacharline:");while(ch!='\n'){r}printf("%d\n",cnt);urn}include<>intmain(){inti,j;iii{jijprintf("%d*%d=%-3d",j,i,i*j);printf\n");}urn}***include<>intmain(){inti,j,n;{rjjnijprintf("");forjji;j++)printf*");printf\n");}urn}9.从键盘输入一个正整数，编程判断其是否为素数(质数).include<>intmain(){inti,n;riiini{if(n%i==0)k}printf("%d不是一个素数.\n",n);printf("%d是一个素数.\n",n);urn}includedefineN0intmain(){intn,s=0,i;riiNi{if(n<0)}printf("%d\n",s);urn}11.从键盘输入1000个学生某门课程的百分制成绩，分别统计其中80分以上(即大于或等于80)、60分以上及低于60分的人数。include<>defineNintmain(){intm,n,k,i;mnk;oriiNi{core{printf输入的成绩不符合百分制成绩要求，本成绩输入作废,请重新输i--;}if(score>=80)lseifscore}printf("%d:%d:%d\n",m,n,k);urn}1111 4=1−3+5−7++(−1)−12−1+?#include<>intmain(){doublepi=,t=;intsgn=1;while(t<1000000){pisgn/t;}printfPi.6lf\n",4*pi);urn}每次搬3块，女人每人每次搬2块，小孩两人include<>intmain(){intw,m,c;formmm)forwww){if(m*3+w*2+c*.5==45)printf("%d:%d:%d\n",m,w,c);}urn}include<>intmain(){intm,n,m1,n1,r;scanfddmn;mwhile(r!=0){}printfgcddddnmn1,n);printflcmdddnmnm1*n1/n);urn}n。11111−2+3−4++(−1)−1+?#include<>intmain(){blestintsgn=1;while(t<=100){}printf("s=%.6lf\n",s);urn}15.计算如下规律式子的值。其中a与n的值都是由键盘输入确定。如当a为2，n为3。a+aa+aaa++aaaa(n个a)includeintmain(){inta,n,s=0,t;printf("inputa,n:");fddanwhile(n>0){n--;}surn}3571011+++++246100include<>intmain(){intn;fornnn2){tnn}printf("%.6f\n",s);urn}include<>intmain(){intn,s=0,i;iii{nn3;}printf("%d\n",s);urn}include<>intmain(){intone,two,five,cnt=0;forfivefivefive+)fortwotwotwo){onefivetwo;if(one>=0){printf("%d:%d:%d\n",one,two,five);}}printf("一共有%d种换法\n",cnt);urn}20.编程统计并输出200到300以内的全部素数。include<>intmain(){intm,i,k=0;formm;m+=2){foriiimi)if(m%i==0)kif(i*i>m){printf("%8d",m);if(k%5==0)printf("\n");}}printfn00之间一共有%d个素数\n",k);urn}21.打印所有“水仙花数”，所谓“水仙花数”是指一个三位数，其各位数字的立方和等于数自身。如153include<>intmain(){intm,n,k;kkkif(m*m*m+n*n*n+k*k*k==m*100+n*10+k)printf("%5d",m*100+n*10+k);printf\n");urn}22.输出200到300之间满足如下条件的数，即各位数字之和为12，数字之积为42.include<>intmain(){intm,n;ifm+n==10&&m*n==21)printfd,200+m*10+n);printfn;urn}23.编程将一个正整数进行质因数分解，例如输入90，须在屏幕上打印出90=2*3*3*5include<>intmain(){intm,n;printf%d=",m);while(m!=1){while(m%n==0){printf%d",n);if(m!=n)printf");}}printf("\n");urn}include<>intmain(){intletter,space,digit,other;letter=space=digit=other=0;printf("inputacharline:");while(ch!='\n'){letter;lseifchchelseifch=='')etchar}printf("%d:%d:%d:%d\n",letter,digit,space,other);urn}。3#include<>intmain(){intm,i,t;mmm{miifm%i==0){if(i*i!=m)}if(t==m)printf"%d\n",m);}urn}26.从键盘输入10个整数，求这些整数的总和及平均值，并统计不低于平均值的元素个include<>#defineN5intmain(){inta[N],i,cnt=0;riiNi{}riiNi{if(a[i]>=aver/N)}printfd是%.0f,平均值是%.2f\n",N,aver,aver/10);printf%d个\n",cnt);urn}27.设有存放于数组中一组整数，现从键盘输入一个整数，在数组中查找该数，如果数组中defineN0intmain(){inta[N]={16,35,48,29,56,43,93,64,90,48};intn,sgn,i;foriiNi{if(a[i]==n){printf("%d在数组中的%d位置出现.\n",n,i+1);}NULL}if(sgn==0)printfdn,n);urn}include<>include<>include<>#defineN10intmain(){inta[N],i,k;{printfd,a[i]);}iiNi{if(a[i]>a[k]){}}printf("\n最大值是%d，它是数组的第%d个数\n",a[k],k+1);urn}include<>#defineN10intmain(){inta[N],i,k,j,t;printf请输入%d个整数:",N);iNi{dai}forjjNj){orijiNiif(a[i]>a[k])tajaj]=a[k];a[k]=t;}iNiprintf("%5d",a[i]);printf\n");urn}现有一数组，其元素已按由大到小的顺序排列，现从键盘输入一个数，插入到该数组include<>defineN10intmain(){inta[N+1]={98,96,87,78,72,64,56,51,43,36};intn,i;iNiprintf("%5d",a[i]);printf\n");printf"请输入待插入的整数:");riNiiif(a[i]<n)kiiNiprintf("%5d",a[i]);printf\n");urn}设有存放于一维数组中一组整数，且已按由小到大顺序排序，现从键盘输入一个整查找该数，如果数组中含有该数，则输出该数的出现位置，否则输出“**不Nain{inta[N]={93,90,64,56,50,48,43,35,29,16};intn,sgn,top,bott,mid;bott=N-1;while(top<=bott){mid=(top+bott)/2;if(a[mid]==n){k}121nbott=mid-1;}if(sgn==0)printfdn,n);printf("%d在第%d个数位置被发现.\n",n,mid+1);urn}11133146415101051includeintmain(){intyang[N][N],n,i,j;niyang[i][0]=yang[i][i]=1;niijyang[i][j]=yang[i-1][j]+yang[i-1][j-1];{rjjnijprintf("%3c",'');jijprintf("%6d",yang[i][j]);printf\n");}urn}include<>defineN80intmain(){Nchijrharforistr[i]!='\0';i++)if(str[i]!=ch)striurn}现有若干字符串存放于一个二维数组中，每行存放一个字符串，现要求用冒泡法将这些includeincludedefineN#defineM6intmain(){trMNtempNijforiiM;i++)getsstri;fori=0;i<M-1;i++)for(j=0;j<M-i-1;j++)if(strcmp(str[j],str[j+1])>0){strjmp}iMiputsstri]);urn}35.现有一个英文句子，请编程统计其中的单词数，已知单词之间用空格分隔(空格数大于等于1)，不考虑单词是否为合法英语单词，特别提醒，第一单词之前也可能有若干空include<>defineN80intmain(){ntrforistri;i++){if(str[i]==''&&str[i+1]!=''&&str[i+1]!='\0')}printfd单词\n",cnt);urn}现有一实型一维数组，请编程分别找出其中的最大值和最小值，并将最大值与数组的最include<>#defineN10intmain(){tintma,mi,i;foriiNicanffaimamiiiNi{ifa[i]>a[ma])if(a[i]<a[mi])}if(ma==0)iamaaNforiiNiprintfa[i]);printfn;urn}37.编程求一方阵的两条对角线元素和(包括主副对角线)include<>#defineN5intmain(){inta[N][N],i,j,s=0;iNi{j}riiNiif(i!=N-i-1)aiNiprintf("该方阵的对角元素的和为%d\n",s);urn}的元素颠倒次序，即第1元素与最后一个元素交换位置，第2个include<>#defineN10intmain(){inta[N],i,t;iNidairiiNi{aiaNi];}foriiNiprintf("%5d",a[i]);printfn;urn}detmain{intaNijoriiiNi{ifa[i]!=0)jifa[j]%a[i]==0)}oriiNiif(a[i]!=0)printf("%5d",a[i]);printf("\n");urn}include<>defineNintmain(){rforistr[i]!='\0';i++)if(str[i]=='')puts(str);urn}41.请写一个函数用于统计在一个一维数组中出现指定数值的次数，要求一维数组及指定数includedefineN0intmyseek(inta[],intlen,intn){inti,cnt=0;iifa[i]==n)returncnt}intmain(){intnum[N],n,i,count;iNiyseeknumNnprintfddnncount;urn}。deisprimeintn{ntiifni)include<>urnreturn1;}intmain){intiifisprimei1)printfdirintfnurn}43.编写了递归函数求Fibonacci数列的第n项，其中n由参数传递，并在主函数中调用该longfib(intn){return1;turnfibnfibn}intmain){intiprintfldfibi;rintfnurn}44.编写一函数，实现用冒泡法将数组元素按由大到小排列，其中排序的数组及参与排序的includedefineN0voidbubble_sort(intarr[],intn){inti,j,t;iinirjjnijifarr[j]<arr[j+1]){tarrjarrjarrjarrj+1]=t;}}intmain(){inta[N],i;iNidaibubblesort(a,N);iNiprintf("%5d",a[i]);printf\n");urn}45.编写一函数，实现用选择法将数组元素按由小到大排列，其中排序的数组及参与排序的include<>#defineN10voidselect_sort(intarr[],intn){inti,j,t,k;iini{orjijnjif(arr[j]<arr[k])tarrk;arr[k]=arr[i];arr[i]=t;}}intmain(){inta[N],i;iNidaiaNiNiprintf("%5d",a[i]);printf\n");urn}6.编写一个函数，其原型为voiddelete_char(charstr[],charch)，功能是从参数str指定的字#include<>#defineN81voiddelete_char(charstr[],charc