西北農(nóng)林科技大學(xué)c語言實(shí)習(xí)答案

習(xí)1

編程寫程序，在屏幕上輸出信息HappyNew/*形*/void{New}由鍵盤任意輸/*簡(jiǎn)單計(jì)算*void{floata,b;float&a,&b);c=a-b;1printf("和%f,=%f,積%f,=%f\n",h,c,j,s);}已/*計(jì)算梯形積*void{floatdoublescanf("%f",&supline);scanf("%f",&dowline);scanf("%f",&high);=printf("%f\n",area);}輸?shù)腁SCII碼輸出此字符對(duì)應(yīng)的碼。/*輸出字符的ASCII*void{2c;scanf("%c",&c);printf("%d\n",c);}據(jù)類型長(zhǎng)度測(cè)試

試所使用整形長(zhǎng)整型/*數(shù)據(jù)類型試*void{printf("sizeofchar=%d\n",sizeof(char));printf("sizeofshort=%d\n",sizeof(short));printf("sizeofint=%d\n",sizeof(int));printf("sizeofprintf("sizeoffloat=%d\n",sizeof(float));printf("sizeofdouble=%d\n",sizeof(double));}輸于Fail“/*成績(jī)判斷*3void{floatmark;scanf("%f",&mark);if(mark<60)elseprintf("Pass\n");}輸ch;printf("%c\n",ch);}elseif(ch>='a'&&ch<='z')printf("%c\n",ch);}4elseprintf("%c\n",ch);}三/*計(jì)算三角積*#include"math.h"#includevoid{doublea,b,c,s,area;printf("請(qǐng)輸入3長(zhǎng)");if(a+b>c&&b+c>a&&a+c>b){area=sqrt(s*(s-a)*(s-b)*(s-c));printf("三角形的面積是%f\n",area);}else5這!}

““No/*判斷是否*void{floatprintf("請(qǐng)輸入長(zhǎng):");b+c>a)else}從鍵盤輸入三個(gè)數(shù)，將它們按從大到小進(jìn)/*按從大到*6{a,b,c,d,e,f;printf("請(qǐng)輸數(shù)n1,n2,n3:");scanf("%d%d%d",&a,&b,&c);printf("排序：%d,%d\n",b,if(a>b){{d=c;e=a;f=b;}{if(c<b){d=a;e=b;f=c;}else{=c;}7}}else{if(b<c)}else{if(a>c)=c;}=c;=a;}}}printf("：%d,%d,%d\n",e,f);}8任入n/*數(shù)據(jù)統(tǒng)計(jì)*#include<stdio.h>void{i,n,m,jishuhe=0,oushuhe=0,jishuge=0,oushuge=0;scanf("%d",&n);for(i=0;i<n;i++){scanf("%d",&m);if(m%2!=0){}else{oushuhe=oushuhe+m;}}9printf("%d\n%d\n%d\n%d\n",jishuhe,jishuge,oushuhe,oushuge);}2階，最后剩階；每步階跨階，跨階正好到階梯頂問滿足條件的最少階梯/*愛因斯坦題*#include<stdio.h>void{x=7;while(!((x%3==2)&&(x%5==4)&&(x%6==5)))printf("%d\n",x);}第2天接著吃了第n下1/*猴子吃桃題*/10void{x=1,i;scanf("%d",&n);for(i=1;i<n;i++){}printf("%d\n",x);}(^????????11/**void{Div,Multi;a1,b1;scanf("%d%d",&a,&b);if(a<b){=temp;}{rem=12}Multi=printf("%d\n%d\n",Div,Multi);}求sin(x)的近似值求的近sin(x)=x-x3/3!+x5/5!-x7/7!+....(-1)nx(2n+1)/(2n+1)!+.../*求sin(x)的近似值*#include<math.h>{floatfloati,sinx,x;scanf("%f",&x);a=x;for(i=1;fabs(a/b)>=1e-6;i++)13{=b*2*i*(2*i+1);}printf("%f\n",sinx);}數(shù)n，用該字符在屏幕上輸出如下圖形：*************************一個(gè)字?jǐn)?shù)14用該字void{ch;scanf("%d",&n);for(i=0;i<n;i++){for(j=0;j<(n-1-i);j++)");for(j=0;j<(2*i+1);j++)printf("%c",ch);}}(^數(shù)

15兩串字連接將abcdef/*字符串連*void{i,j,k;str[20]={"\0"},str1[10],str2[10];{if(i<j)str[i]=str1[i];elsestr[i]=str2[i-j];}16}/*字接*/void{i,j;for(i=0;str1[i]!='\0';i++);for(j=0;str2[j]!='\0';j++){str1[i]=str2[j];}17=}

一串字加密后1.可和puts()輸入用碼運(yùn)將a-z，Z各即移2個(gè)字母后為a,z移為Y移2為A，Z右移為B18/*簡(jiǎn)單加密序*/void{a[80];i;gets(a);for(i=0;a[i]!=0;i++){if((a[i]>='A'&&elseif((a[i]>='y'&&a[i]<='z')||(a[i]>='Y'&&a[i]<='Z'))a[i]=a[i]-24;}}

×5的數(shù)組5×主對(duì)角191012151720222565

對(duì)/*矩陣對(duì)角和*void{i,j;sum1=0,sum2=0;for(i=0;i<5;i++)for(j=0;j<5;j++)20for(i=0;i<5;i++){sum2=sum2+a[i][4-i];}%d\n",sum1,sum2);}

入個(gè)數(shù)，將任意10數(shù)據(jù)調(diào)的10個(gè)數(shù)①定義、x1、x2，分別存放最大數(shù)、在入d1入d221在與比d1入d2；否與x1比較，若x1入x1，并將其下標(biāo)存結(jié)所將x2所/*整*void(){i,a[10],temp;kmax=0,kmin=0;for(i=0;i<10;i++)scanf("%d",&a[i]);for(i=0;i<10;i++){if(a[i]>a[kmax])if(a[i]<a[kmin])kmin=i;22}a[0]=a[kmax];a[kmax]=temp;if(kmax!=9){}、字串連接/*exer兩串字符連接*/#include<stdio.h>#include<string.h>void{unsignedinti,j;soustr[80],desstr[80];//printf("pleaseenter//printf("pleaseenter

/*輸入原串*//*輸目的串*/i=strlen(soustr);/*取目的串尾部位置*/for(j=0;{soustr[i]=desstr[j];/*將原串依次接入目的串尾部*/}23}、簡(jiǎn)加密程序/*exer字符加密*/#include<stdio.h>#include<string.h>void{unsignedintj;soustr[80],secstr[80];//printf("pleaseenterfor(j=0;{if(soustr[j]>='A'&&soustr[j]<='Z'

/*輸入原串*//*計(jì)算大寫字母密文*if(soustr[j]>='a'&&soustr[j]<='z'(soustr[j]-'a'+2)%26+'a';計(jì)算小寫字母密*/*其字符不變*/}puts(secstr);}、矩對(duì)角線元素和/*exer主和輔對(duì)角線上元素之和*/#include<stdio.h>#include<string.h>void{inti,j;inta[5][5];intsum1=0,sum2=0;//printf("pleaseenterfor(i=0;i<5;i++)for(j=0;j<5;j++)scanf("%d",&a[i][j]);/*輸數(shù)組*/for(i=0;i<5;i++){/*主對(duì)角*/sum2+a[i][4-i];/*輔角線*/}printf("%d}24、數(shù)順序調(diào)整/*exer將最大數(shù)調(diào)到最前面，最小數(shù)調(diào)到最后面*/#include<stdio.h>#include<string.h>void{inti,a[10],temp;intkmax=0,kmin=0;//printf("pleaseenterfor(i=0;i<10;i++)/*輸數(shù)組*/for(i=0;i<10;i++){if(a[i]>a[kmax])kmax=i;/*找大數(shù)位置*/=i;/*找小數(shù)位*/}==&&kmin{a[kmax];a[kmax]temp;/*與前的數(shù)交換*/}{a[kmax];a[kmax]temp;/*與前的數(shù)交換*/=/*與后面的數(shù)交換*/}for(i=0;i<9;i++)printf("%d/*輸出數(shù)組*/printf("%d\n",a[i]);}、字個(gè)數(shù)統(tǒng)計(jì)/*exer統(tǒng)計(jì)大寫字母、小寫字母、數(shù)字及其它字符的個(gè)數(shù)*/#include<stdio.h>#include<string.h>void25{unsignedinti;intcap=0,low=0,dig=0,oth=0;/*定義并初始化*/str[80];//printf("pleaseenterstr:");/*輸原串*/for(i=0;i<strlen(str);i++){&&str[i]<='Z')cap++;/*統(tǒng)計(jì)大寫字母*/if(str[i]>='a'&&str[i]<='z')low++;/*統(tǒng)計(jì)小寫字母*/if(str[i]>='0'&&/*統(tǒng)計(jì)數(shù)字*//*統(tǒng)其它字符*/}printf("%d}、學(xué)成績(jī)計(jì)算/*exer求每一個(gè)學(xué)生的總成績(jī)和平均成績(jī)*/#include<stdio.h>void{inti,j;floatscore[10][5]={0.0f};floatallsco[10],avesco[10];for(i=0;i<10;i++)for(j=0;j<5;j++)scanf("%f",&score[i][j]);/*輸入學(xué)生的成績(jī)*/for(i=0;i<10;i++){=0;/*總績(jī)清零*/for(j=0;j<5;j++){=allsco[i]+score[i][j];/*累總成績(jī)*/}avesco[i]/*計(jì)算平均成績(jī)*/}for(i=0;i<10;i++)%f\n",allsco[i],avesco[i]);/*輸成績(jī)*/}26、姓排序/*exer姓名排序*/#include<stdio.h>#include<string.h>void{int//printf("pleaseenterfor(i=0;i<10;i++)gets(name[i]);/*輸姓名數(shù)組*/for(i=0;i<9;i++)/*排*/{k=i;for(j=i+1;j<10;j++)if(strcmp(name[k],name[j])>0)k=j;if(k!=i){/*交換*/}}for(i=0;i<10;i++)/*輸出姓名數(shù)組*/}、輸楊輝三角形/*exer打印楊輝三角形*/#include<stdio.h>void{inti,j;inta[6][6];for(i=0;i<6;i++){a[i][i]=1;/*主對(duì)角線為1*/=/*第為1*/}for(i=2;i<6;i++)for(j=1;j<i;a[i][j]=/*計(jì)算*/for(i=0;i<6;i++){27for(j=0;j<=i;printf("%d",a[i][j]);/*輸*/printf("\n");/*換*/}}、用針實(shí)現(xiàn)排序/*exer由鍵盤輸入10個(gè)數(shù)，將它們按由小到大順序排列*/#include<stdio.h>void{inta[10],*pNULL;/*說數(shù)組和指針*/inti,j,temp;=a;a+10;p++)/*指針從數(shù)組首到尾*/{p);/*利指針依次輸入*/}a;=i<i++)/*利用指針依次比較*/{=i+1;j<j++)if(*(p+i)*(pj)){*(pi);+i)=*(pj);+j)=}}for(p=a;p<+9;p++)printf("%d*p);}、用針實(shí)現(xiàn)字符排序/*exer將10個(gè)度小于的字符串排序*void{inti,j;=i<10;i++)28{=/*指數(shù)組的每個(gè)元素指向各行*}=i<10;i++){gets(psz[i]);/*輸入10個(gè)符串*}=i<i++)/*字符串排序*/{=i+1;j<j++){psz[j])>{psz[i]);strcpy(psz[i],psz[j]);strcpy(psz[j],}}}=i<10;i++){/*輸出字符串*/}}、數(shù)倒置/*exer將具有個(gè)元素的一維數(shù)組中的數(shù)據(jù)倒*/void{intiTemp,inti;=i<10;i++){+i);/*輸入數(shù)組*}=a;==a,a+p<q;/*首交*{iTemp=*p;*p*qiTemp;}29=i<10;i++){printf("%d*(a+i));/*輸出*/}}、用針實(shí)現(xiàn)數(shù)據(jù)置調(diào)整/*exer輸入10個(gè)數(shù)，將最大的調(diào)到最后，最小的調(diào)到最*void*px,int*py);int{intiTemp,*pMax,*pMin;inti;=i<10;i++){+i);/*入數(shù)組*}=/*最大值指針指向數(shù)組首*pMin=/*最值指針指向數(shù)組首地*=i<10;i++){if(*(a+i)*pMax)=+i;if(*(a+i)pMin=ai;}/*最大值是第1個(gè)素，最小值是最后一個(gè)元*if(pMax==a&&pMin==+9){pMin);}{/*最小值與第一個(gè)元素交*pMin);/*最大值與最后一個(gè)元素交*swap(a+pMax);}30=i<10;i++){printf("%d*(a+i));/*輸出*/}0;}void*px,int{inttemp;*px;*py;temp;}、用針實(shí)現(xiàn)查找維數(shù)組中最大數(shù)及其位置/*exer找出二維數(shù)組（設(shè)行）中的最大數(shù)及其位置*/void{inta[3][4],(*p)[4],iRow;inti,j;a;=i<i++){=j<j++)*(p+i)j);/*入數(shù)組*}iCol=/*設(shè)最大數(shù)及其置*/iRow=0;=i<i++){=j<j++){if(*(*(pi)j)*(*(p+iCol)){iRow=i;iCol=j;/*改位置*}}}printf("%d%d\n",iRow,iCol,a[iRow][iCol]);}31、用針實(shí)現(xiàn)子字串提取/*exer由鍵盤輸入一串字符，從字符串下標(biāo)為m開取出字符和n由盤輸入成個(gè)新的字符串void{

*/szStrSour[80],*pszSour,inti,/*輸入字符串*/&n);/*輸入位置和長(zhǎng)度*/pszSour=szStrSour+m;/*確定起始位置*/=szStrDest;=i<i++)/*依取字符*/{*pszDest=pszDest++;pszSour++;}*pszDest='\0';/*在符串末尾追加結(jié)束標(biāo)志*/puts(szStrDest);}、整交換函數(shù)設(shè)/*exer交換2個(gè)數(shù)*/#include<stdio.h>void*,int*);/*函聲明*/void{inta,b;//printf("pleaseenterscanf("%d%d",&a,&b);/*輸入個(gè)整數(shù)*///printf("a=%d,b=%d\n",a,b);swap(&a,&b);/*調(diào)函數(shù)進(jìn)行交換*/printf("%d}void*p1,int*p2)/*交函數(shù)*/{inttemp;*p2;/*交*/32*p2=*p1;*p1=temp;}、數(shù)字符個(gè)數(shù)統(tǒng)函數(shù)設(shè)計(jì)/*exer統(tǒng)計(jì)一串字符中數(shù)字字符的個(gè)數(shù)*/#include<stdio.h>intcount(char*);/*函數(shù)聲明*/void{//printf("pleaseenter/*輸字符串*//*調(diào)函數(shù)進(jìn)行統(tǒng)計(jì)*/}intcount(char*p)/*統(tǒng)函數(shù)*/{intwhile(*p!='\0')/*循環(huán)依次遍歷*/{&&*p<='9')num++;/*統(tǒng)計(jì)*/}num;

/*指針后移*/}、排函數(shù)設(shè)計(jì)/*exer利用函數(shù)排序*/#include<stdio.h>void/*函聲明*/void{intn,i,data[10];//printf("pleaseenter&n);for(i=0;i<n;i++)scanf("%d",&data[i]);/*輸數(shù)組*//*調(diào)用函數(shù)排序*/for(i=0;i<n;i++)printf("%d",data[i]);/*輸數(shù)組*/}void/*排函數(shù)*/{33inti,j,k,temp;for(i=0;i++)/*排*/{k=i;for(j=i+1;j++)if(a[k]<a[j])k=j;if(k!=i){a[k];a[k]a[i]temp;/*交換*/}}}、矩轉(zhuǎn)置函數(shù)設(shè)/*exer矩陣轉(zhuǎn)置*/#include<stdio.h>voidtranspose(int);/*函數(shù)聲明*/void{intn,i,j,&n);for(i=0;i<n;i++){for(j=0;j<n;j++)/*輸數(shù)組*/}/*調(diào)用函數(shù)轉(zhuǎn)置*/for(i=0;i<n;i++){for(j=0;j<n-1;j++)printf("%d",data[i][j]);/*輸數(shù)組*/}}voidtranspose(int/*轉(zhuǎn)置函數(shù)*/{intfor(i=0;i<n;i++)/*轉(zhuǎn)*/{for(j=0;j<i;{34a[i][j];a[i][j]=a[j][i];a[j][i]=temp;/*交*/}}}、求數(shù)函數(shù)設(shè)計(jì)/*exer求素?cái)?shù)*/#include<stdio.h>intPrime(int);/*函數(shù)聲明*/void{int/*定義整型變量*/for/*循環(huán)依次遍歷待檢測(cè)的奇數(shù)*/{/*調(diào)用函數(shù)判斷此數(shù)是否為素?cái)?shù)*/{printf("%d/*輸素?cái)?shù)*/num++;/*統(tǒng)素?cái)?shù)*/}}/*輸出素?cái)?shù)個(gè)數(shù)*/}intPrime(int/*判斷此數(shù)是否為素?cái)?shù)函數(shù)*/{int/*定義開關(guān)變量*/inti,k;k=sqrt((double)n);found=/*初化開關(guān)變量*/i=while(i<=k&&found)/*循環(huán)依次檢測(cè)條件*/{if(n%ifound=/*一除盡修正開關(guān)變量*/i++;}}、進(jìn)轉(zhuǎn)換函數(shù)設(shè)/*exer八進(jìn)制數(shù)據(jù)字符串轉(zhuǎn)換為十進(jìn)制數(shù)據(jù)*/#include<stdio.h>int*);/*函聲明*/35void{/*輸入八進(jìn)制數(shù)據(jù)字符串*//*調(diào)子函數(shù)轉(zhuǎn)換*/}int*p)/*轉(zhuǎn)換子函數(shù)*/{intfor(;*p!='\0';=num*8+*p-'0';/*進(jìn)轉(zhuǎn)換*/}、求大公約數(shù)函設(shè)計(jì)/*exer求最大公約數(shù)*/#include<stdio.h>intcomdivi(int/*函數(shù)聲明*/void{int//printf("pleaseentertwoscanf("%d%d",&a,&b);/*輸入兩個(gè)正整數(shù)*/=/*調(diào)用函數(shù)*/printf("%d\n",com);}intcomdivi(intm,intn)/*求最大公約數(shù)子函數(shù)*/{intif(n>m)/*如m小，換*/{intz=m;==}{m%n;/*開始迭代*/==}while(q!=0);/*循環(huán)整除取直到余數(shù)為0*/36}、對(duì)數(shù)組判斷/*exer判斷二維數(shù)組是否為對(duì)稱數(shù)組*/#include<stdio.h>int/*函數(shù)聲明*/void{intn,i,j,&n);for(i=0;i<n;i++){for(j=0;j<n;j++)/*輸數(shù)組*/}if(array((int4))/*調(diào)函數(shù)判斷*/printf("Yes\n");printf("No\n");}int*p,int/*判此數(shù)組是否為對(duì)稱數(shù)函數(shù)*/{int/*定義開關(guān)變量*/inti,j;found=/*初始化開關(guān)變量*/for(i=0;i<n;i++){for(j=0;j<i;{/*循環(huán)依次判斷*/{found=break;}}}}37、電薄管理程序計(jì)/*exer7-1手機(jī)電話簿管理*/#include<stdio.h>#include<stdlib.h>#include<string.h>int/*定全局變，代表電話簿長(zhǎng)度*/structstud/*定義結(jié)構(gòu)類型*/{name[15];}void);voidinsert();voidsearch(voiddelete();void);int{intk;{0:exit\n");1:2:3:insert\n");4:delete\n");5:output\n");select:");scanf("%d",&k);switch(k){creat();break;break;

/*定義結(jié)構(gòu)數(shù)組*//*函的原型聲明*//*主數(shù)*//*打印菜單項(xiàng)*//*輸入選擇項(xiàng)*//*退出函數(shù)*/38);break;);break;);break;/*調(diào)用子函數(shù)*/}}0;}void/*生子函數(shù)*/{getchar();/*輸入結(jié)構(gòu)數(shù)組*/{if(*appella=='*')break;/*輸入*則結(jié)束*/strcpy(book[N].name,gets(book[N].phone_num);N++;/*統(tǒng)長(zhǎng)度*/}}void/*查子函數(shù)*/{inti=0;getchar();while(i<N&&strcmp(book[i].name,appella)!=0){i++;}if(i<N)printf("%s%s