时间:2018-12-1来源:本站原创作者:佚名

题目:编写一个函数,输入n为偶数时,调用函数求1/2+1/4+...+1/n,当输入n为奇数时,调用函数    1/1+1/3+...+1/n(利用指针函数)1.程序分析:2.程序源代码:#include"stdio.h"main(){floatpeven(),podd(),dcall();floatsum;intn;while(1){ scanf("%d",n); if(n〉1)   break;}if(n%2==0){ printf("Even="); sum=dcall(peven,n);}else{ printf("Odd="); sum=dcall(podd,n);}printf("%f",sum);}floatpeven(intn){floats;inti;s=1;for(i=2;i〈=n;i+=2) s+=1/(float)i;return(s);}floatpodd(n)intn;{floats;inti;s=0;for(i=1;i〈=n;i+=2) s+=1/(float)i;return(s);}floatdcall(fp,n)float(*fp)();intn;{floats;s=(*fp)(n);return(s);}题目:填空练习(指向指针的指针)1.程序分析:       2.程序源代码:main(){char*s[]={"man","woman","girl","boy","sister"};char**q;intk;for(k=0;k〈5;k++){          ;/*这里填写什么语句*/ printf("%s\n",*q);}}题目:找到年龄最大的人,并输出。请找出程序中有什么问题。1.程序分析:2.程序源代码:#defineN4#include"stdio.h"staticstructman{charname[20];intage;}

person[N]={"li",18,"wang",19,"zhang",20,"sun",22};

main(){structman*q,*p;inti,m=0;p=person;for(i=0;i〈N;i++){if(m〈p-〉age) q=p++; m=q-〉age;}printf("%s,%d",(*q).name,(*q).age);}题目:字符串排序。1.程序分析:2.程序源代码:main(){char*str1[20],*str2[20],*str3[20];charswap();printf("pleaseinputthreestrings\n");scanf("%s",str1);scanf("%s",str2);scanf("%s",str3);if(strcmp(str1,str2)〉0)swap(str1,str2);if(strcmp(str1,str3)〉0)swap(str1,str3);if(strcmp(str2,str3)〉0)swap(str2,str3);printf("afterbeingsorted\n");printf("%s\n%s\n%s\n",str1,str2,str3);}charswap(p1,p2)char*p1,*p2;{char*p[20];strcpy(p,p1);strcpy(p1,p2);strcpy(p2,p);}题目:海滩上有一堆桃子,五只猴子来分。第一只猴子把这堆桃子凭据分为五份,多了一个,这只    猴子把多的一个扔入海中,拿走了一份。第二只猴子把剩下的桃子又平均分成五份,又多了    一个,它同样把多的一个扔入海中,拿走了一份,第三、第四、第五只猴子都是这样做的,    问海滩上原来最少有多少个桃子?1.程序分析:2.程序源代码:main(){inti,m,j,k,count;for(i=4;i〈;i+=4){count=0;m=i;for(k=0;k〈5;k++){ j=i/4*5+1; i=j; if(j%4==0)   count++; else   break;} i=m; if(count==4) {printf("%d\n",count);   break;}}}

题目:*??=*??+9*??+1其中??代表的两位数,8*??的结果为两位数,9*??的结果为3位数。求??代表的两位数,及*??后的结果。1.程序分析:2.程序源代码:output(longb,longi){printf("\n%ld/%ld=*%ld+%ld",b,i,i,b%i);}main(){longinta,b,i;a=;for(i=10;i〈;i++){b=i*a+1;if(b〉=0b〈=8*i〈9*i〉=)output(b,i);}}题目:八进制转换为十进制1.程序分析:                2.程序源代码:main(){char*p,s[6];intn;p=s;gets(p);n=0;while(*(p)!=‘\0‘){n=n*8+*p-‘0‘;p++;}printf("%d",n);}题目:求0—7所能组成的奇数个数。1.程序分析:2.程序源代码:main(){longsum=4,s=4;intj;for(j=2;j〈=8;j++)/*jisplaceofnumber*/{printf("\n%ld",sum);if(j〈=2)s*=7;elses*=8;sum+=s;}printf("\nsum=%ld",sum);}题目:一个偶数总能表示为两个素数之和。1.程序分析:2.程序源代码:#include"stdio.h"#include"math.h"main(){inta,b,c,d;scanf("%d",a);for(b=3;b〈=a/2;b+=2){for(c=2;c〈=sqrt(b);c++)if(b%c==0)break;if(c〉sqrt(b))d=a-b;elsebreak;for(c=2;c〈=sqrt(d);c++)if(d%c==0)break;if(c〉sqrt(d))printf("%d=%d+%d\n",a,b,d);}}题目:判断一个素数能被几个9整除1.程序分析:2.程序源代码:main(){longintm9=9,sum=9;intzi,n1=1,c9=1;scanf("%d",zi);while(n1!=0){if(!(sum%zi))n1=0;else{m9=m9*10;sum=sum+m9;c9++;}}printf("%ld,canbedividedby%d\"9\"",sum,c9);}题目:两个字符串连接程序1.程序分析:2.程序源代码:#include"stdio.h"main(){chara[]="acegikm";charb[]="bdfhjlnpq";charc[80],*p;inti=0,j=0,k=0;while(a!=‘\0‘b[j]!=‘\0‘){if(a{c[k]=a;i++;}elsec[k]=b[j++];k++;}c[k]=‘\0‘;if(a==‘\0‘)p=b+j;elsep=a+i;strcat(c,p);puts(c);}题目:回答结果(结构体变量传递)1.程序分析:       2.程序源代码:#include"stdio.h"structstudent{intx;charc;}a;main(){a.x=3;a.c=‘a‘;f(a);printf("%d,%c",a.x,a.c);}f(structstudentb){b.x=20;b.c=‘y‘;}题目:读取7个数(1—50)的整数值,每读取一个值,程序打印出该值个数的*。1.程序分析:2.程序源代码:main(){inti,a,n=1;while(n〈=7){do{    scanf("%d",a);    }while(a〈1

a〉50);for(i=1;i〈=a;i++) printf("*");printf("\n");n++;}getch();}题目:某个公司采用公用电话传递数据,数据是四位的整数,在传递过程中是加密的,加密规则如下:    每位数字都加上5,然后用和除以10的余数代替该数字,再将第一位和第四位交换,第二位和第三位交换。1.程序分析:2.程序源代码:main(){inta,i,aa[4],t;scanf("%d",a);aa[0]=a%10;aa[1]=a%/10;aa[2]=a%0/;aa[3]=a/0;for(i=0;i〈=3;i++) {aa+=5; aa%=10; }for(i=0;i〈=3/2;i++) {t=aa; aa=aa[3-i]; aa[3-i]=t; }for(i=3;i〉=0;i--)printf("%d",aa);}

题目:专升本一题,读结果。1.程序分析:2.程序源代码:#include"stdio.h"#defineM5main(){inta

={1,2,3,4,5};inti,j,t;i=0;j=M-1;while(i{t=*(a+i);*(a+i)=*(a+j);*(a+j)=t;i++;j--;}for(i=0;iprintf("%d",*(a+i));}

题目:时间函数举例11.程序分析:2.程序源代码:#include"stdio.h"#include"time.h"voidmain(){time_tlt;/*definealonginttimevarible*/lt=time(NULL);/*systemtimeanddate*/printf(ctime(〈));/*englishformatoutput*/printf(asctime(localtime(〈)));/*tranfertotm*/printf(asctime(gmtime(〈)));/*tranfertoGreenwichtime*/}题目:时间函数举例21.程序分析:                2.程序源代码:/*calculatetime*/#include"time.h"#include"stdio.h"main(){time_tstart,end;inti;start=time(NULL);for(i=0;i〈;i++){printf("\1\1\1\1\1\1\1\1\1\1\n");}end=time(NULL);printf("\1:Thedifferentis%6.3f\n",difftime(end,start));}题目:时间函数举例31.程序分析:2.程序源代码:/*calculatetime*/#include"time.h"#include"stdio.h"main(){clock_tstart,end;inti;doublevar;start=clock();for(i=0;i〈;i++){printf("\1\1\1\1\1\1\1\1\1\1\n");}end=clock();printf("\1:Thedifferentis%6.3f\n",(double)(end-start));}

题目:时间函数举例4,一个猜数游戏,判断一个人反应快慢。(版主初学时编的)1.程序分析:2.程序源代码:#include"time.h"#include"stdlib.h"#include"stdio.h"main(){charc;clock_tstart,end;time_ta,b;doublevar;inti,guess;srand(time(NULL));printf("doyouwanttoplayit.(‘y‘or‘n‘)\n");loop:while((c=getchar())==‘y‘){i=rand()%;printf("\npleaseinputnumberyouguess:\n");start=clock();a=time(NULL);scanf("%d",guess);while(guess!=i){if(guess〉i){printf("pleaseinputalittlesmaller.\n");scanf("%d",guess);}else{printf("pleaseinputalittlebigger.\n");scanf("%d",guess);}}end=clock();b=time(NULL);printf("\1:Ittookyou%6.3fseconds\n",var=(double)(end-start)/18.2);printf("\1:ittookyou%6.3fseconds\n\n",difftime(b,a));if(var〈15)printf("\1\1Youareveryclever!\1\1\n\n");elseif(var〈25)printf("\1\1youarenormal!\1\1\n\n");elseprintf("\1\1youarestupid!\1\1\n\n");printf("\1\1Congradulations\1\1\n\n");printf("Thenumberyouguessis%d",i);}printf("\ndoyouwanttotryitagain?(\"yy\".or.\"n\")\n");if((c=getch())==‘y‘)gotoloop;}题目:家庭财务管理小程序1.程序分析:2.程序源代码:/*moneymanagementsystem*/#include"stdio.h"#include"dos.h"main(){FILE*fp;structdated;floatsum,chm=0.0;intlen,i,j=0;intc;charch[4]="",ch1[16]="",chtime[12]="",chshop[16],chmoney[8];pp:clrscr();sum=0.0;gotoxy(1,1);printf("

---------------------------------------------------------------------------

");gotoxy(1,2);printf("

moneymanagementsystem(C1.0).03

");gotoxy(1,3);printf("

---------------------------------------------------------------------------

");gotoxy(1,4);printf("

--moneyrecords--

--todaycostlist--

");gotoxy(1,5);printf("

------------------------

-------------------------------------

");gotoxy(1,6);printf("

date:--------------

");gotoxy(1,7);printf("

");gotoxy(1,8);printf("

--------------

");gotoxy(1,9);printf("

thgs:------------------

");gotoxy(1,10);printf("

");gotoxy(1,11);printf("

------------------

");gotoxy(1,12);printf("

cost:----------

");gotoxy(1,13);printf("

");gotoxy(1,14);printf("

----------

");gotoxy(1,15);printf("

");gotoxy(1,16);printf("

");gotoxy(1,17);printf("

");gotoxy(1,18);printf("

");gotoxy(1,19);printf("

");gotoxy(1,20);printf("

");gotoxy(1,21);printf("

");gotoxy(1,22);printf("

");gotoxy(1,23);printf("

---------------------------------------------------------------------------

");i=0;getdate(d);sprintf(chtime,"%4d.%02d.%02d",d.da_year,d.da_mon,d.da_day);for(;;){gotoxy(3,24);printf("Tab__browsecostlistEsc__quit");gotoxy(13,10);printf("");gotoxy(13,13);printf("");gotoxy(13,7);printf("%s",chtime);j=18;ch[0]=getch();if(ch[0]==27)break;strcpy(chshop,"");strcpy(chmoney,"");if(ch[0]==9){mm:i=0;fp=fopen("home.dat","r+");gotoxy(3,24);printf("");gotoxy(6,4);printf("listrecords");gotoxy(1,5);printf("

-------------------------------------

");gotoxy(41,4);printf("");gotoxy(41,5);printf("

");while(fscanf(fp,"%10s%14s%f\n",chtime,chshop,chm)!=EOF){if(i==36){getch();i=0;}if((i%36)〈17){gotoxy(4,6+i);printf("");gotoxy(4,6+i);}elseif((i%36)〉16){gotoxy(41,4+i-17);printf("");gotoxy(42,4+i-17);}i++;sum=sum+chm;printf("%10s%-14s%6.1f\n",chtime,chshop,chm);}gotoxy(1,23);printf("

---------------------------------------------------------------------------

");gotoxy(1,24);printf("

");gotoxy(1,25);printf("

---------------------------------------------------------------------------

");gotoxy(10,24);printf("totalis%8.1f$",sum);fclose(fp);gotoxy(49,24);printf("pressanykeyto.....");getch();gotopp;}else{while(ch[0]!=‘\r‘){if(j〈10){strncat(chtime,ch,1);j++;}if(ch[0]==8){len=strlen(chtime)-1;if(j〉15){len=len+1;j=11;}strcpy(ch1,"");j=j-2;strncat(ch1,chtime,len);strcpy(chtime,"");strncat(chtime,ch1,len-1);gotoxy(13,7);printf("");}gotoxy(13,7);printf("%s",chtime);ch[0]=getch();if(ch[0]==9)gotomm;if(ch[0]==27)exit(1);}gotoxy(3,24);printf("");gotoxy(13,10);j=0;ch[0]=getch();while(ch[0]!=‘\r‘){if(j〈14){strncat(chshop,ch,1);j++;}if(ch[0]==8){len=strlen(chshop)-1;strcpy(ch1,"");j=j-2;strncat(ch1,chshop,len);strcpy(chshop,"");strncat(chshop,ch1,len-1);gotoxy(13,10);printf("");}gotoxy(13,10);printf("%s",chshop);ch[0]=getch();}gotoxy(13,13);j=0;ch[0]=getch();while(ch[0]!=‘\r‘){if(j〈6){strncat(chmoney,ch,1);j++;}if(ch[0]==8){len=strlen(chmoney)-1;strcpy(ch1,"");j=j-2;strncat(ch1,chmoney,len);strcpy(chmoney,"");strncat(chmoney,ch1,len-1);gotoxy(13,13);printf("");}gotoxy(13,13);printf("%s",chmoney);ch[0]=getch();}if((strlen(chshop)==0)

(strlen(chmoney)==0))continue;if((fp=fopen("home.dat","a+"))!=NULL);fprintf(fp,"%10s%14s%6s",chtime,chshop,chmoney);fputc(‘\n‘,fp);fclose(fp);i++;gotoxy(41,5+i);printf("%10s%-14s%-6s",chtime,chshop,chmoney);}}}

题目:计算字符串中子串出现的次数1.程序分析:2.程序源代码:#include"string.h"#include"stdio.h"main(){charstr1[20],str2[20],*p1,*p2;intsum=0;printf("pleaseinputtwostrings\n");scanf("%s%s",str1,str2);p1=str1;p2=str2;while(*p1!=‘\0‘){if(*p1==*p2){while(*p1==*p2*p2!=‘\0‘){p1++;p2++;}}elsep1++;if(*p2==‘\0‘)sum++;p2=str2;}printf("%d",sum);getch();}

题目:从键盘输入一些字符,逐个把它们送到磁盘上去,直到输入一个#为止。1.程序分析:       2.程序源代码:#include"stdio.h"main(){FILE*fp;charch,filename[10];scanf("%s",filename);if((fp=fopen(filename,"w"))==NULL){printf("cannotopenfile\n");exit(0);}ch=getchar();ch=getchar();while(ch!=‘#‘){fputc(ch,fp);putchar(ch);ch=getchar();}fclose(fp);}题目:从键盘输入一个字符串,将小写字母全部转换成大写字母,然后输出到一个磁盘文件"test"中保存。    输入的字符串以!结束。1.程序分析:2.程序源代码:#include"stdio.h"main(){FILE*fp;charstr[],filename[10];inti=0;if((fp=fopen("test","w"))==NULL){printf("cannotopenthefile\n");exit(0);}printf("pleaseinputastring:\n");gets(str);while(str!=‘!‘){if(str〉=‘a‘str〈=‘z‘)str=str-32;fputc(str,fp);i++;}fclose(fp);fp=fopen("test","r");fgets(str,strlen(str)+1,fp);printf("%s\n",str);fclose(fp);}题目:有两个磁盘文件A和B,各存放一行字母,要求把这两个文件中的信息合并(按字母顺序排列),    输出到一个新文件C中。1.程序分析:2.程序源代码:#include"stdio.h"main(){FILE*fp;inti,j,n,ni;charc[],t,ch;if((fp=fopen("A","r"))==NULL){printf("fileAcannotbeopened\n");exit(0);}printf("\nAcontentsare:\n");for(i=0;(ch=fgetc(fp))!=EOF;i++){c=ch;putchar(c);}fclose(fp);ni=i;if((fp=fopen("B","r"))==NULL){printf("fileBcannotbeopened\n");exit(0);}printf("\nBcontentsare:\n");for(i=0;(ch=fgetc(fp))!=EOF;i++){c=ch;putchar(c);}fclose(fp);n=i;for(i=0;i〈n;i++)for(j=i+1;j〈n;j++)if(c〉c[j]){t=c;c=c[j];c[j]=t;}printf("\nCfileis:\n");fp=fopen("C","w");for(i=0;i〈n;i++){putc(c,fp);putchar(c);}fclose(fp);}题目:有五个学生,每个学生有3门课的成绩,从键盘输入以上数据(包括学生号,姓名,三门课成绩),计算出    平均成绩,况原有的数据和计算出的平均分数存放在磁盘文件"stud"中。1.程序分析:2.程序源代码:#include"stdio.h"structstudent{charnum[6];charname[8];intscore[3];floatavr;}stu[5];main(){inti,j,sum;FILE*fp;/*input*/for(i=0;i〈5;i++){printf("\npleaseinputNo.%dscore:\n",i);printf("stuNo:");scanf("%s",stu.num);printf("name:");scanf("%s",stu.name);sum=0;for(j=0;j〈3;j++){printf("score%d.",j+1);scanf("%d",stu.score[j]);sum+=stu.score[j];}stu.avr=sum/3.0;}fp=fopen("stud","w");for(i=0;i〈5;i++)if(fwrite(stu,sizeof(structstudent),1,fp)!=1)printf("filewriteerror\n");fclose(fp);}

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