c語(yǔ)言課本例題（ExamplesofClanguagetextbooks）

c語(yǔ)言課本例題(ExamplesofClanguagetextbooks)Advancedprogramming2012-01-059:00-11:001-203LuYuhongZhouJinfengLutodiagnoseischemiccerebrovasculardiseaseThethirdchapterissequentialstructureprogramming.input3characters,andreverseoutput3charactersandtheirASCIIcode.ttinclude"stdio.h"”Voidmain(){charchi,CH2,ch3;Scanf(，，%c%c%c，/,&chl,&ch2,&ch3);Printf("祝，％d\n”,CH3,CH3);Printf("%c,%d\n",CH2,CH2);Printf("%c,%d\n",chi,chi);findingtherealrootsofequationax*x+bx+c=0.ttinclude"stdio.h""Voidmain(){floata,B,C,disc,xl,x2;Printf〈inputa,B,c:');ScanfC%f,%f, &a,&b,&c);Disc=b*b-4ac;Xl=(-b+sqrt(disc)/(2*a));X2=(-b-sqrt(disc)/(2*a));Printf("\nxl=%6.2f\nx2=%6.2f\n”,xl,X2);seekingpredecessorcharactersandsubsequentcharacters.Enteracharactertofinditspredecessorandsubsequentcharacters.Outputinorderfromlargetosmall.#include"stdio””Voidmain(){charchi;Printf("enteracharacter\n");Scanf("%c",&chl);Printf("precursorcharacters:%c,metacharacters:%c,successorcharacters:%c,theirASCIIvaluesare:%d,%d,%d\n",chl+1,chi,chl-1,chl+1,chi,chl-l);inputthelengthofthetriangle,calculatetheareaofthetriangle(area=sqrt(s(S-A)(S-B)(S-A)),s=(a+b+c)/2)ThefourthchapterchoosesstructuralprogrammingFiveAccordingtotheinputstudentachievementjudgment,whenthescoreis>=90,forAandsoon, ttinclude"stdio.h"”Voidmain(){intscore;Scanf(“刎"，&score);Switch(score/10){case10:Case9:printf("%d:A\n",score);break;Case8:Case7:printf("%d:B\n",score);break;Case6:printf("%d:C\n",score);break;Default:printf("%d:D\n",score);break;solvingtherealsolutionofequationax*x+bx+c=0.#include"stdio.h"Voidmain(){floata,B,C,xl,X2,disc;Printf(，zinputaBc:");Scanf(，，%f%f%f/，,&a,&b,&c);If(Fabs(a)<le-6)Printf("theequationisnotaquadratic");Else{disc=b*b-4*a*c;If(disc<0)Printf("theequationhasnotrealroot");ElseIf(fac(disc)<le-6);Printf("theequationhastwoequalroot");Else{xl=(-b+sqrt(disc))/(2*a);X2=(-b-sqrt(disc))/(2*a);Printf("theequationhasdistinctroot:%8.4f,%8.4f",xl,x2)real;inputreign,determinewhetherrunnian.#include"stdio.h""Voidmain(){unsignedintyear,leap;Printf("Enteryear:");Scanf("%d",&year);如果(年%=400=0)跳躍=1;｛如果（年份%4=0和年%100!=0）跳躍=1;其他跳躍=0；）如果（飛躍==1）printf（“%d:是閏年?！蹦辏?；elseprintf（"%d是不是閏年。"年）;）輸入年號(hào)與月份,輸出這一年該月的天數(shù)（一個(gè)年份,先判斷是否是潤(rùn)年）#包括くstdio.h>#包括くく數(shù)學(xué)。”無(wú)效main（）無(wú)符號(hào)整型年份、月份、跳躍;scanf（"%d%d”,年、月）；如果（年%=400=0）其他的（如果（%4=0和年%100）!=0）跳躍=1;其他的跳躍=0；）開(kāi)關(guān)（月）案例1：printf（"月31”）;休息;案例2：如果（跳躍=1）printf（"月29"\n）；printf（“月28”）;休息;案例3：printf（“月31”）;休息;案例4：printf（“月30”）;休息;案例5：printf（“月31”）；休息；案例6：printf（“月30”）;休息；案例7：printf（“月31”）;休息;案例8：printf（“月31”）；休息；案例9printf（“月30”）;休息;案例10：printf（“月31”）;休息；案例11：printf（“月30”）；休息；案例12：printf（“月31”）;休息;）break;Case1:printf（"%d,y=x+1"）;break;第五章循環(huán)結(jié)構(gòu)程序設(shè)計(jì)1.寫(xiě)ー個(gè)程序,輸入一個(gè)班學(xué)生的成績(jī),求全班的平均成績(jī).#include"STDIO.H"Voidmain(){floatScore,average=0;Intn=0;Each("%F"&score);While(score>=0)+={averagescore;N++;Each("%F"&score);)If(n!Averageaverage==0)/N;Prinf("%6.2f“average);.計(jì)算s=l+2+3+4+...+100.#include"STDIO.HVoidmain()Int{s=0,R;For(i=0;I<=100;I++)S=S+I;Printf("%s=(D,S);}.用for循環(huán)語(yǔ)句求你n!#include"STDIO.H"Voidmain(){inti,N;LongFAC;Each("%d”,&N)FAC=1;For(i=0;Iく=N;I++)FAC=FAC*i;Printf(*%d!”%Id=N,FAC);4.編寫(xiě)為多個(gè)學(xué)生的成績(jī)?cè)u(píng)定等級(jí)的程序.#include"STDIO.H"Voidmain(){inti;score;Each("%d"&score);While(score>=0){switch(SCORE/10){caselO:Case9:printf("%d:\n"Score);break;Case8:Case7:printf('%d:Bscore\n");break;Case6:printf("%dscoreC;\n");break;Default:printf("%dscoreD:\n");Each("%d"&score)inputnintegers,findtheaveragenumberofevennumbersinthesennumbers,andoutput.(main)(Intn,sum,I,J,count=0;Intsum=0;Scanf("%d”,&n)1=0While(i++くn){scanf("%d",&j);If(...J%2)Sum+=j;Count++;})Sum=sum/count;Printf sum);)inputapositiveintegerfromthekeyboard,calculateandoutputthenumberofthesumofthenumbersttinclude"stdio.h"”(main)(Inta,s=0,u,i;Printf<pleaseenteranumber:\n，z);Scanf("%d",&a);For(i=10;;i=i*10)If(a%i==0)break;For(i=i/10;i==l;i=i/10)U=a%i,s=u+s,a=a—u*i;Printf s);)enterastringofcharacters,capitalizetheuppercaseletterstolowercaseletters,lowercaseletterstouppercaseletters,andthenoutput.#includeくstdio.h>Voidmain(){inti=0;Chara[100],c;Printf("enterthestringcontent:\t");Do{scanf("%c",&a[i]);C=a[i];1++；While(c!='\n');A[i]='\（r；1=0；Printf〈inputstringis\t"）;While（a[i]!=‘、〇'）!Printf（"%c",a[i]）;i++;）Printf（thecontentoftheconvertedstringis:\t）;1=0;While（a[i]!='\0'）{c[i]；如果（C>=A&Cく=Z）[我]=32；如果（C>=A&Cく=Z）［我］=32；printf("%c”,ー個(gè)［我］);++;))8。輸出所有的水仙花數(shù)?！彼苫〝?shù)”指ー個(gè)三位數(shù),其個(gè)位數(shù)字立方和等于該數(shù)本身。#包括“stdio.h”主〇{i,j,k,n；對(duì)于(n=100；n<1000；n+++){i=n/100；J=N/10-1*10；k=n10；如果(i)printf("水仙花數(shù)是:%d"，n)；printf("\n")；)9。如何編寫(xiě)程序”輸出1?999中能被3整除,而且至少有一位數(shù)字是5的所有數(shù)字”？<stdio.h>國(guó)際main(){inti；對(duì)于(i=1；i<999；i++){如果(我％3==0&((我%10==5)II(I/10)%10==5II(I/100)%10==5))printf("%dヽ”,我)；))10o計(jì)算斐波那契分?jǐn)?shù)序列前N項(xiàng)之和#包括"stdio.h”{int,n,i；浮點(diǎn)數(shù)和,a,b；printf（"\n輸入N：”）；scanf（“%d”,和N）；總和=0；a=2；b=l；對(duì)于（i=1；i=n；i++）{和/+A=A+B；B=A-B；）printf（“金額=%f\n”,總和）；11。ー個(gè)數(shù)如果恰好等于它的因子之和。即6=1+2+3,1000內(nèi)滿足條件的數(shù)求。#包括“stdio.h”{m,n,i；對(duì)于（m=2；m<1000；m++）{=0；對(duì)于（i=1；i；m；m++）如果（（mi）=0）n+1；如果（n=m）{printf（"如是一個(gè)完數(shù),它的因子是"，m）；為（i=i；；i；m；；+）如果（我==0m左右）printf（“%d”,我）；printf（"\n"）；}12〇編寫(xiě)程序,按下列公式計(jì)算E的值。{int=l；浮點(diǎn)P，f,a=l；p—0；f—1；而(A-P)>le-b){=a；a+1.0/f；printf("%d",n)；氮+;printf("%10.8f\n”,A)；)printf("%10.6f\n”,A)；)第六章。函數(shù)與編譯預(yù)處理lo編寫(xiě)計(jì)算X的N次乘方的程序。#包括“stdio.h”主〇｛浮點(diǎn)數(shù)X,y；intn；浮動(dòng)功率(浮點(diǎn)數(shù)x,intn)；scanf("%、%、&x和n)；y=功率(x,n)；printf("％8.2f”，Y)；)浮動(dòng)功率(浮點(diǎn)數(shù)x,intn)；{intI；浮點(diǎn)T=l；對(duì)于(i=l；i=n；i++)T=x；返回T；)2求組米!/(n!(M-N)!)長(zhǎng)因子(k)｛長(zhǎng)f=l;inti；對(duì)于（i=1,i=k；i+）f=fi；返回F；）長(zhǎng)梳（整數(shù)n?整數(shù)m）｛長(zhǎng)C；C=FAC（M）/FAC（N）XFAC（M-N））；返回C；）主要（）｛整數(shù)n,m；長(zhǎng)C；scanf（“%d,%d”,與N和M）；丙（m,n）；Printf C);inputtwonumbers,outputthelargernumber.ttinclude"stdio.h"”Voidmain(){inta,B,m;Intmax(intint);Scanf("%d,%d",&a,&b);M=max(a,B);Printf("max=%d”,m);)Intmax(intx,inty);{intt;If(x>y)t=x;Elset=y;Returnt;forthecommondenominator,ttinclude"stdio.h"”Intdivisor(inta,intb){intr;Do{r=a%b;A=b;B=r;}while(r!=0);Returna;)Voidmain(){inta,B,d;Scanf("肌|,%d”,&a,&b);If(a>b)D=divisor(a,B);ElseD=divisor(B,a);Printf("a=%d,b=%d\n”,a,B);Printf("d=%d”,D);)Thecommondenominator5.usingrecursivemethodforMandn.IntGCD(intm,intn){intg;If(n==0)G=m;ElseG=gcd(n,m%n)Return(g);Voidmain(){intm,n;Scanf("%d,%d",&m,&n);Printf("gcd=%d”,GCD(m,n));)seekingtheleastcommonmultiple.Intdivisor(inta,intb){intr;While((r=a%b)!=0){a=b;b=r;}Returnb;)Intmultiple(inta,intb){intd;D=divisor(a,B);Returna*b/d;Voidmain(){inta,B,c;Printf(，zinputab:");Scanf(“紀(jì)％d",&a,&b);C=multiple(a,B);Printf("c=%d",C);)enterastringthatrepresentsapositiveinteger,andconvertthestringtothecorrespondingnumber.Intcton(){charch;Intn=0,f=0,nI=0;While((ch=getchar())く='O'||ch〉='9'){nl++;If(nl>=10){printf("dataiswrong!");return0;})Do{n=n*10+ch-’〇';}While((ch=getchar())>-'0'&&ch<='9');Returnn;)ofthetwointegerGCDandLCM#include"stdio.h""Voidmain()(intI,m,N,temp;Scanf("%d%d",&m&n);If(m>n){temp=m;m=n;n=temp;}For(i=m;i>0;i--)If(m%i==0&&n%i==0){printf("%d\n",I);Break;)For(i=l;iく=m;i++)If(n*i%m==0){printf("%d\n",n*i);Break;))inputalineofcharacters,statisticsoftheEnglishletters,spaces,numbersandothercharacters.ttinclude"stdio.h"”Voidmain(){inta,B,K,d;Z=k=s=q=O;Charc;While(c=getchar()!=\'n'){if(c>='a'&&cく='z'IIc>='A'&&cく='Z')A++;Elseif(c==)B++;Elseif(c>='O'&&cく='9')K++;ElseD++;)Printf〈alphabet”:%3d,space:%3d,number:%3d,Other:%3d\n",Z,K,Q);Seventhchapters,arrayinput5numbersfromthekeyboard,outputthemaximum,minimumelementvalueandtheirsubscript.ttinclude"stdio.h"”Voidmain(){intI,J,K,Max,min;Staticinta[5];For(i=0;i<5;i++)Scanf("%d”,&a[i]);Max=min=a[0];J=k=O;For(i=0;i<5;i++){if(maxくa[i]){max=a[i];j=i;}Elseif(min>a[i]){min=a[i];k=i;}Printf("max:a[%d]=%d,min:a[%d]=%d，/,J,Max,K,min);input16integersfromthekeyboard,saveinthetwo-dimensionalarrayof4x4,outputevenlineandevencolumn.Include"stdio.h"”Voidmain(){intI,j;Inta[4][4];For(i=0;i<4;i++)For(j=0;j<4;j++)Scantf("%d",&a[i][j]);For(i=0;i<4;i++){for(j=0;j<4;j++)If(i%2==0|Ij%2==0)printf("%-4d”,a[i][j]);Elseprintf("%-4c",'');Printf("\n");initializethearraya[4][4]withthe4X4matrix,andfinditstransposematrixandoutput.#defineM4ftdefineN4Include"stdio.hVoidmain(){intI,k;Inta[M][N]={{l,2,3,4},{5,6,7,8},{9,10,11,12},{13,14,15,16}};Intb[M][N];For(i=0;i<M;i++)For(k=0;k<N;K++)b[i][k]=a[k][i];For(i=0;i<M;i++){(k=0;k<n;k++)printf("%5d",b[i][k]);printf("ヽn");4.求一個(gè)3x3的整型矩陣對(duì)角線元素之和.#include"stdio.h"voidmain(){inta[3][3],sum=0;inti,j;TOC\o"1-5"\h\zfor (i=0; i < 3; i + +)for (j=0, j < 3; j + +)scanfC%d"&a[i][j]);for (i=0; i < 3; i + +)for (j=0, j < 3; j + +)if(i==j)sum=sum+a[i][j];printf("sum=%d\n,sum);).用選擇法對(duì)!0個(gè)數(shù)進(jìn)行排序.#include"stdio.h"voidmain(){inti,j,my,temp,a[11];for(i=0;i<=10;1++)scanf("%d"&a[i]);for(i=0;iく=10;i++){i=i；for(j=i+1;j<=10;j++)if(a[j]=a[i])my=j;temp=a[i],a[i]=a[i],a[i]=temp;)for(i=0;i<=10;i++)printf("%5d",a[i]);).從鍵盤(pán)上輸入若干學(xué)生成績(jī),計(jì)算平均成績(jī),并輸出高于平均分的人數(shù)及成績(jī).#iclude"stdio”voidmain(){floatscore[100],ave,sum=0,x;inti,n=0,count;printf(，zinputscore:/z);while(x>=0&&nく100){sum+=x;score[n++]=x;scanf("%f",&x);}ave=sum/n;printf(average=%f\n”,ave);for(count=0;i=0;i<n;i++)if(score[in]>ave)(printf("%f\n",score[in]")count++;如果(計(jì)數(shù)%5==0)printf("\n")；)printf("數(shù)=%d\n",計(jì)數(shù));)7。假設(shè)在數(shù)組一中的數(shù)據(jù)按由小到大的順序排列,從鍵盤(pán)上輸入ー個(gè)數(shù),判定該數(shù)是否在數(shù)組中,若在,輸出所在序列號(hào);若不在,輸出相應(yīng)信息。#定義M4#定義N4包括"stdio.h"主〇｛海峽int[M]=｛-12,0,6,16,23,56,80100110115｝；整數(shù)n,低，中,高,找到;低=0；咼=m-1；發(fā)現(xiàn)=0；printf（“輸入一個(gè)數(shù)字,要搜索:“）;scanf（“％d”,和N）；同時(shí)（低く=高）{=（低+高）/2；如果（n=a）{->}=1;斷裂;否則如果（=中）低=中+1；其他高=中葉1;）如果（發(fā)現(xiàn)==1）printf（"索引%d%d”,N,MID）；elseprintf（"沒(méi)有%d",n）；}8o用冒泡法將8個(gè)數(shù)按由小到大排序。#包括"stdio.h"#DeineN80主（）{INTA的口;整數(shù),m；空排序（intb[],intk）；空打?。╥nt[]ロ,intk）；printf（"niputm（<80）："）；scanf（“機(jī)!”,和一個(gè)[我]）;排序（a,m）；打?。ˋ,M）；）空排序（intb[],intk）{i,j,t,標(biāo)志;為（i=0；J<K-l；j++）{標(biāo)志=0；為（i=0）；我的くくk-j-1；i++）如果(bi[b[i+1]{[b]；b[i=B[i+1]；b[i+1]=t；標(biāo)志=1；)如果(標(biāo)志=0)中斷;))空打印(int[]ロ,intk){intI；對(duì)于(i=0；i＜；k；++){如果(我%4==0)putchar('\n)；printf(“%-6D"，B[我]);9。輸出如下楊輝三角#包括“stdio.h”#DeineN10主(){i,j,n,b]n；虛空楊輝(int口[],intn)；printf("輸入:n")；scanf(“%d”,和N)；楊輝(B,N)；為(i=0；i＜；；+(+)){Cj=0;j=Lj++)printf(“%-4D"，B[我][J])；printf("\n")；虛空楊輝(INTA[][],intn){inti,j；為(i=0；i＜；；+(+)){[i][0]=1;[我]=1；)為(i=2；i＜；；+(+))對(duì)于(j=1;j＜i;j++)ー個(gè)[我][J]=[*][J]-[?]+[J];}10o輸入一行字符,統(tǒng)計(jì)其中有多少個(gè)單詞,單詞之間用一個(gè)或多個(gè)空格隔開(kāi)。#包括“stdio.h”#包括“弦?！敝鳗枺麛?shù);字符s[80]；國(guó)際count_words(ー個(gè)字符[]);printf("輸入一個(gè)字符串:")；獲取(s)；n=count_word(S)；printf(字?jǐn)?shù)%d”，n)；)國(guó)際count_words(ー個(gè)字符[]){,k,=0；d=strlen(str);domua0usawhile(str]k]=='');str]k+1]=‘、〇';d=0;while(str[k]=='')c++;if(str[d].="、〇")num=1;while(str[d].='ヽO'){if(k〉0&&str[k]==''&&str[k-1].='')num++;C++；}returnnum;)11.從鍵盤(pán)輸入ー串英文字母,(不含空格與其他字符),統(tǒng)計(jì)每個(gè)字母的個(gè)數(shù),并輸出字母及相應(yīng)的個(gè)數(shù).#include'stdio.h"voidmain(){inti=0,c[52]={0},m=0;charstr[80];printf("inputastring:");scanf('%s”,str);while(str[i]){if(str[i]>='a'&&str[i]く='z')c[str[i]-"a"]++；if(str[i]>='a'&&str[i]く='z')c[str[i]-'a'+26]++；i++；}for(i=0;i<26;i++)if(c[i]){if(m%8==0)putchar('\n');m++;printf('%c:%d”,i+'ac[i]);)for(i=0;i<26;i++)if(c[i+26]){if(m%8==0)putchar('\n');m++;printf('%c:%d”,i+'a',c[i+26]);12.約瑟夫環(huán)問(wèn)題.include(stdio.h"definen100voidmain(){inta[n];inti,j,m,n,k=0;printf〈inputn,m:');scanf("%d%d”,&n&m);printf("entercodearray:");為(i=0；iく;；+(+))scanf("%d",和一個(gè)[我]);printf("Noutput：\n")；為(i=0；i<；；+(+)){二1;同時(shí)(J<M){(a=k=0)k=(k+1)%n；++;k=(k+1)%n；)當(dāng)(a==0)k=(k+1)%n；printf("%6d”，K)；a；k~0；))第八章指針1。指針交換比較。#包括"stdio.h"主〇{a,b,*,*,PB；空交換(int*Pl,int*P2)；和一個(gè);鉛與硼;scanf("％d,%d”，&,&B)交換(PA,PB)；printf("\nmain()：=%d,B=%d\n”，A,B)；printf("\n小說(shuō):*PA=%d,*PD=%d\n”,**PA,PB)；)空交換(int*Pl,int*P2){int*p；P=P1;Pl=P2；P2=p；printf(“美國(guó)國(guó)家社會(huì)主義白人黨:*Pl=%d,*P2=刎ゝn"，**Pl,P2)；}2。函數(shù)max()用來(lái)求一位數(shù)組中元素的最大值,在主調(diào)用函數(shù)中用函數(shù)名調(diào)用該函數(shù)與函數(shù)指針調(diào)用該函數(shù)實(shí)現(xiàn)。#包括“stdio.h”主〇{浮sumf,水池;浮動(dòng)[M]={11,2,-3,4,5,5,69,7,80)；浮點(diǎn)數(shù)(P)〇;浮點(diǎn)(浮點(diǎn),int,n)；最大值;污水池=(*P)(A,M)；sumf=max(a,m)；printf("倉(cāng)=%〇2f\n",水池);printf("倉(cāng)=%〇2f\n”,水池)；)浮點(diǎn)(浮點(diǎn))，intn)(k；漂浮的;s=［0］；對(duì)于（k=0；k；n；k+）如果（<<）］;返回的;）3〇用不同的方法輸出整型數(shù)組ー的各元素。包括"stdio.h"主〇｛staticint［5］=｛第3｝；int,p；對(duì)于（i=0；i<5；i+）printf（"4D",ー個(gè)［我］）;putchar（'\n'）；對(duì)于（i=0；i<5；i+）printf（“4D”，*（+我））;putchar（'\n'）；對(duì)于（p=a；p<+5；p++）printf（“4D”,*P）；putchar（'\n'）；=a；對(duì)于（i=0；i<5；i+）printf（“4D”，P[我]）;）4。用數(shù)組名常量指針輸出ニ維數(shù)組,并將數(shù)組中的最大元素及所在行列號(hào)輸出。#包括“stdio.h"主（）{i,j,m,n,max；a[3][4]={1,2,3,4,5,6,7,8,9,10,11,12）；m=0；n=0；最大值;對(duì)于(i=0；i<3,++){printf("\n")；對(duì)于(j=0；jV4；j++){printf("%5D”，*(*(+我)+J))；如果(最大**(*+i)+j)；{max*(*(a+i)+j)；m=i；n=j；printf（"\n麥克斯:一[%2D][%2D]=%d,m,n,”麥克斯）；）用指向數(shù)組