C语言程序的设计苏小红版答案

2.2 *include<stdio.h>main(){float*=2.5,y=2.5,z=2.5;printf("*=%f\n",*);printf("y=%f\n",y);printf("z=%f\n",z);}3.1(1)*include<stdio.h>main(){inta=12,b=3;float*=18.5,y=4.6;printf("%d\n",(float)(a*b)/2);printf("%d\n",(int)*%(int)y);}3.2 *include<stdio.h>main(){int*,b0,b1,b2,s;printf("Input*:");scanf("%d",&*);b2=*/1;b1=(*-b2*1)/10;b0=*%10;s=b0*1+b1*10+b2;printf("s=%d\n",s);}3.3 *include<stdio.h>*include<math.h>main(){floatrate=0.0225;floatn,capital,deposit;printf("Inputn,capital:");scanf("%f,%f",&n,&capital);deposit=capital*pow(1+rate,n);printf("deposit=%f\n",deposit);}3.4 *include<stdio.h>*include<math.h>main(){floata,b,c;double*,y;printf("Inputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);*=(-b+sqrt(b*b-4*a*c))/(2*a);y=(-b-sqrt(b*b-4*a*c))/(2*a);printf("*=%f,y=%f\n",*,y);}4.1(1)*include<stdio.h>main(){charc1='a',c2='b',c3='c';printf("a%cb%cc%c\n",c1,c2,c3);}4.1(2)*include<stdio.h>main(){inta=12,b=15;printf("a=%d%%,b=%d%%\n",a,b);}4.1(3)*include<stdio.h>main(){inta,b;scanf("%2d%*2s%2d",&a,&b);printf("%d,%d\n",a,b);}4.2 *include<stdio.h>main(){longa,b;float*,y;scanf("%d,%d\n",&a,&b);scanf("%f,%f\n",&*,&y);printf("a=%d,b=%d\n",a,b);printf("*=%f,b=%f\n",*,y);}5.1*include<stdio.h>main(){floata;printf("Innputa:");scanf("%f",&a);if(a>=0){a=a;printf("a=%f\n",a);}else{a=-a;printf("a=%f\n",a);}}5.2*include<stdio.h>main(){inta;printf("Inputa:");scanf("%d",&a);if(a%2==0){printf(是偶数");}else{printf(是奇数");}}5.3*include<stdio.h>*include<math.h>main(){floata,b,c,s,area;printf("Inputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);if(a+b>c&&a+c>b&&b+c>a){s=(a+b+c)/2;area=(float)sqrt(s*(s-a)*(s-b)*(s-c));printf("area=%f\n",area);}else{printf即是三角形");}}5.4*include<stdio.h>*include<math.h>main(){floata,b,c,*,y;printf("Inputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);if(a==0){printf诙方程不是一元二次方程\n");}if(b*b-4*a*c>0){*=(-b+sqrt(b*b-4*a*c))/(2*a);y=(-b-sqrt(b*b-4*a*c))/(2*a);printf("*=%f,y=%f\n",*,y);}elseif(b*b-4*a*c==0){*=-b/(2*a);y=-b/(2*a);printf("*=%f,y=%f\n",*,y);}else{printf诙方程无实根\n");}}5.5 *include<stdio.h>main(){intyear,flag;printf("Inputayear:");scanf("%d",&year);if(year%4==0&&year%4!=0||year%4==0){flag=1;}else{flag=0;}if(flag==1){printf("%disaleapyear!\n",year);}else{printf("%disnotaleapyear!\n",year);}}5.6 *include<stdio.h>main(){intyear,flag;printf("Inputayear:");scanf("%d",&year);flag=year%4==0||year%4==0&&year%1!=0"1:0;if(flag==1&&flag!=0){printf("%disaleapyear!\n",year);}else{printf("%disnotaleapyear!\n",year);}}5.7 *include<stdio.h>main(){charch;printf("Inputch:");scanf("%c",&ch);if(ch>='a'&&ch<='z'){ch=getchar();ch=ch-32;printf("%c,%d\n",ch,ch);}elseif(ch>='A'&&ch<='Z'){ch=getchar();ch=ch+32;printf("%c,%d\n",ch,ch);}else{printf("%c",ch);}}5.8*include<stdio.h>main(){charch;printf("Inputch:");scanf("%c",&ch);if(ch>=48&&ch<=57){printf("是数字字符\n");}elseif(ch>=65&&ch<=90){printf("是大写字母\n");}elseif(ch>=97&&ch<=122){printf("是h小写字母\n");}elseif(ch==32){printf("是空格\n");}else{printf("是其他字符\n");}}5.9*include<stdio.h>main(){intscore,grade;printf("Inputscore:");scanf("%d",&score);grade=score/10;if(score<0||score>1){printf("Inputerror\n");}if(score>=90&&score<=1){printf("%d—A\n",score);}elseif(score>=80&&score<90){printf("%d--B\n",score);}elseif(score>=70&&score<80){printf("%d--C\n",score);}elseif(score>=60&&score<70){printf("%d--D\n",score);}elseif(score>=0&&score<60){printf("%dE\n",score);}}5.10*include<stdio.h>main(){intyear,month;printf("Inputyear,month:");scanf("%d,%d",&year,&month);if(month>12||month<=0){printf("errormonth\n");}else{switch(year,month){case12:case10:case8:case7:case5:case3:case1:printf("天\n");break;case11:case9:case6:case4:printf("天\n");break;case2:if(year%4==0&&year!=0||year%4==0){printf("天\n");}else{printf("天\n");}break;default:printf("Inputerror\n");}}}6.1(1)*include<stdio.h>main(){inti,j,k;charspace='';for(i=1;i<=4;i++){for(j=1;j<=i;j++){printf("%c",space);}for(k=1;k<=6;k++){printf("*");}printf("\n");}}6.1(2)*include<stdio.h>main(){intk=4,n;for(n=0;n<k;n++){if(n%2==0)continue;k--;}printf("k=%d\n,n=%d\n",k,n);}6.1(3)*include<stdio.h>main(){intk=4,n;for(n=0;n<k;n++){if(n%2==0)break;k--;}printf("k=%d,n=%d\n",k,n);}6.2(1)*include<stdio.h>main(){inti,sum=0;for(i=1;i<=101;i++){sum=sum+i;}printf("sum=%d\n",sum);}6.2(2)*include<stdio.h>main(){longi;longterm,sum=0;for(i=1;i<=101;i=i+2){term=i*(i+1)*(i+2);sum=sum+term;}printf("sum=%ld\n",sum);}6.2(4)*include<stdio.h>*include<math.h>main(){intn=1;floatterm=1.0,sign=1,sum=0;while(term<=-1e-4||term>=1e-4){term=1.0/sign;sum=sum+term;sign=sign+n;n++;}printf("sum=%f\n",sum);}6.2(5)*include<stdio.h>*include<math.h>main(){intn=1,count=1;float*;doublesum,term;printf("Input*:");scanf("%f",&*);sum=*;term=*;do{term=-term****/((n+1)*(n+2));sum=sum+term;n=n+2;count++;}while(fabs(term)>=1e-5);printf("sin(*)=%f,count=%d\n",sum,count);}6.3 *include<stdio.h>main(){int*=1,find=0;while(!find){if(*%2==1&&*%3==2&&*%5==4&&*%6==5&&*%7==0){printf("*=%d\n",*);find=1;*++;}}}/*int*,find=0;for(*=1;!find;*++){if(*%2==1&&*%3==2&&*%5==4&&*%6==5&&*%7==0){printf("*=%d\n",*);find=1;}*/6.4 *include<stdio.h>main(){inti,n;longp=1,m=1;printf("Inputn:");scanf("%d",&n);for(i=1;i<=n;i++){p=i*i;m=i*i*i;printf("p=%d,m=%d\n",i,p,i,m);}}6.5 *include<stdio.h>main(){floatc,f;for(c=-40;c<=110;c=c+10){f=9/5*c+32;printf("f=%f\n",f);}}6.6 *include<stdio.h>*include<math.h>main(){intn;doublec=0.01875,*;do(*=**pow(1+c,12)-10;n++;}while(*>0);printf("*=%d\n",*);}6.7 *include<stdio.h>main(){intn=0;floata=1.0,c;printf("Inputc:");scanf("%f",&c);do{a=a*(1+c);n++;}while(a<=2);printf("n=%d\n",n);}6.8 *include<stdio.h>*include<math.h>main(){intn=1,count=1;doublesum=1,term=1;while(fabs(term)>=1e-5){term=pow(-1,count)*(1.0/(n+2));sum=sum+term;n=n+2;count++;}sum=4*sum;printf("sum=%f,count=%d\n",sum,count);}6.9 *include<stdio.h>*include<math.h>main(){intn=1,count=1;doublesum=1,term=1;while(fabs(term)>=1e-5){term=term*(1.0/n);sum=sum+term;n++;count++;}printf("sum=%f,count=%d\n",sum,count);}6.10*include<stdio.h>*include<math.h>main(){int*;for(*=1;*<=999;*++){if(*==pow(*/1,3)+pow(*/10%10,3)+pow(*%10,3))printf("*=%d\n",*);}}6.11*include<stdio.h>main(){inti=0,n;longsum=0,term=1;printf("Inputn:");scanf("%d",&n);do(i++;term=term*i;sum=sum+term;}while(sum<n);printf("%d\n",i-1);}6.12*include<stdio.h>main(){inti,n,m,count=0,sum=0;printf("Inputn:");scanf("%d",&n);for(i=1;i<=n;i++){printf("Inputm:");scanf("%d",&m);if(m>0){sum=sum+m;count++;}else{break;}printf("sum=%d,count=%d\n",sum,count);}}6.13*include<stdio.h>main(){inti,n,m,count=0,sum=0;printf("Inputn:");scanf("%d",&n);for(i=1;i<=n;i++){printf("Inputm:");scanf("%d",&m);if(m>0||m<0){sum=sum+m;count++;}else{break;}printf("sum=%d,count=%d\n",sum,count);}}6.14 *include<stdio.h>main(){int*,y,z;for(*=0;*<=17;*++){for(y=0;y<=25;y++){3**+2*y+z==50;z=30-*-y;if(3**+2*y+z==50&&*+y+z==30)printf("*=%d,y=%d,z=%d\n",*,y,z);}}}6.15 *include<stdio.h>main(){int*,y;for(*=0;*<=98;*++){y=98-*;2**+4*y==386;if(*+y==98&&2**+4*y==386){printf("*=%d,y=%d\n",*,y);}}}6.16 *include<stdio.h>main(){int*,y,z;for(*=0;*<=20;*++){for(y=0;y<=33;y++){3*y+5**+z/3.0==1;z=1-*-y;if(5**+3*y+z/3.0==1&&z+*+y==1){printf("*=%d,y=%d,z=%d\n",*,y,z);}}}}6.17 *include<stdio.h>main(){int*,y,z;for(*=1;*<=9;*++){for(y=1;y<=17;y++){10**+5*y+z==1;z=50-*-y;if(10**+5*y+z==1&&*+y+z==50&&z>0){printf("*=%d,y=%d,z=%d\n",*,y,z);}}}}7.1 *include<stdio.h>intSquare(inti){returni*i;}intmain(){inti=0;i=Square(i);for(;i<3;i++){staticinti=1;i+=Square(i);printf("%d,",i);}printf("%d\n",i);return0;}7.2*include<stdio.h>inthour,minute,second;voidupdate(){second++;if(second==60){second=0;minute++;}if(minute==60){minute=0;hour++;}if(hour==24)hour=0;}voiddisplay(){printf("%d,%d,%d\n",hour,minute,second);}voiddelay(){intt;for(t=0;t<1;t++);}intmain(){inti;voidupdaye(),display(),delay();for(i=0;i<1;i++){update();display();delay();}return0;}7.3 *include<stdio.h>intGetMa*(inta,intb);intmain(){int*,y,ma*;printf("Input*,y:");scanf("%d,%d",&*,&y);ma*=GetMa*(*,y);printf("ma*=%d\n",ma*);return0;}intGetMa*(intm,intn){if(m>=n)returnm;elsereturnn;}7.4 *include<stdio.h>intLCM(intn,intm);intmain(){inta,b;printf("Inputa,b:");scanf("%d,%d",&a,&b);printf("%d\n",LCM(a,b));return0;}intLCM(intn,intm){int*;intfind=0;for(*=1;!find;*++){if(*%n==0&&*%m==0)find=1;}}return*-1;}7.5 *include<stdio.h>longFact(intn);intmain(){intm,a;printf("Inputm:");scanf("%d",&m);for(a=1;a<=m;a++){printf("%d!=%ld\n",a,Fact(a));}return0;}longFact(intn){inti;longresult=1;for(i=2;i<=n;i++)result*=i;returnresult;}7.6 *include<stdio.h>longFact(intn);intmain(){intm;longret;printf("Inputm:");scanf("%d",&m);ret=Fact(m);printf("ret=%d\n",ret);return0;}longFact(intn){inti;longresult=1,sum=0;for(i=2;i<=n;i++)result*=i;sum=sum+result;}returnsum;}7.7(1)*include<stdio.h>intGcd(inta,intb);intmain(){intm,n;printf("Inputm,n:");scanf("%d,%d",&m,&n);printf("%d\n",Gcd(m,n));return0;}intGcd(inta,intb){intt,min,find=0;min=a<b"a:b;t=min;for(t=min;!find;t—){a%t==0;b%t==0;if(a%t==0&&b%t==0)returnt;}find=1;}7.7(2)*include<stdio.h>intGcd(inta,intb);intmain(){intm,n;printf("Inputm,n:");scanf("%d,%d",&m,&n);printf("%d\n",Gcd(m,n));return0;}intGcd(inta,intb){intr,temp;r=a%b;if(r==0)returnb;elsedo(temp=b;b=r;a=temp;r=a%b;}while(r!=0);returnb;}8.1(1)*include<stdio.h>voidFunc(int*){*=2;}intmain(){int*=10;Func(*);printf("%d",*);return0;}8.1(2)*include<stdio.h>voidFunc(intb[]){intj;for(j=0;j<4;j++){b[j]=j;}}intmain(){staticinta[]={5,6,7,8},i;Func(a);for(i=0;i<4;i++){printf("%d",a[i]);}return0;}8.2(1)intPositiveNum(inta[],intn){inti,count=0;for(i=0;i<n;i++){if(a[i]>0)count++;}return0;}8.2(2)voidFib(longf[],longn){inti;f[0]=0;f[1]=1;for(i=2;i<n;i++){f[i]=f[iT]+f[i-2];}}8.2(3)*include<stdio.h>intmain(){inta[10],n,ma*,min,ma*Pos,minPos;for(n=0;n<10;n++){scanf("%d",&a[n]);}ma*=min=a[0];ma*Pos=minPos=0;for(n=0;n<10;n++){if(a[n]>ma*){ma*=a[n];ma*Pos=n;}elseif(a[n]<min){min=a[n];minPos=n;}}printf("ma*=%d,pos=%d\n",ma*,ma*Pos);printf("min=%d,pos=%d\n",min,minPos);return0;}8.3 voidDivArray(int*pArray,intn){inti;for(i=0;i<n;i++){pArray[i]/=pAttay[0];}}8.4 *include<stdio.h>*defineN40intFailNum(intscore[],intn);voidReadScore(intscore[],intn);intmain(){intscore[N],n;printf("Inputn:");scanf("%d",&n);ReadScore(score,n);FailNum(score,n);printf("FailNumstudentsare%d\n",FailNum(score,n));return0;}intFailNum(intscore[],intn){inti,count=0;for(i=0;i<n;i++){if(score[i]<60)count++;}returncount;}voidReadScore(intscore[],intn){inti;printf("Inputscore:");for(i=0;i<n;i++){scanf("%d",&score[i]);}}8.5 *include<stdio.h>*defineN40intHighAver(intscore[],intn);intReadScore(intscore[]);intmain(){intscore[N],n;n=ReadScore(score);printf("HighAverstudentsare%d\n",HighAver(score,n));return0;}intHighAver(intscore[],intn){inti,count=0,sum=0,aver;for(i=0;i<n;i++){sum=sum+score[i];aver=sum/n;}for(i=0;i<n;i++){if(score[i]>aver)count++;}returncount;}intReadScore(intscore[]){inti=-1;do(i++;printf("Inputscore:");scanf("%d",&score[i]);}while(score[i]>=0);returni;}8.6*include<stdio.h>*defineN40intReadScore(intscore[],longnum[]);intFindMa*(intscore[],longnum[],intn);intmain(){intscore[N],n,ma*,num,t;longnum[N];t=FindMa*(score,n);ma*=score[t];num=num[t];printf("ma*=%d,num=%d\n",ma*,num);return0;}intReadScore(intscore[],longnum[]){inti=-1;do(i++;printf("Inputstudent'sIDandscore:");scanf("%ld%d",&num[i],&score[i]);}while(num[i]>0&&score[i]>=0);returni;}intFindMa*(intscore[],longnum[],intn){intma*,i;ma*=score[0];for(i=1;i<n;i++){if(score[i]>ma*)ma*=score[i];}returni;}8.7 *include<stdio.h>*defineN40intRead(inta[]);intChangeArry(inta[],intn);intmain(){inta[N],n;printf("%d\n",ChangeArry(a,n));return0;}intRead(inta[]){inti;for(i=0;i<9;i++){printf("Inputa:");scanf("%d",&a[i]);returni;}intChangeArry(inta[],intn)intma*,min,i,ma*pos,minpos,term;ma*=min=score[0];for(i=1;i<n;i++){if(a[i]>ma*)ma*=score[i];ma*pos=n;else(a[i]<min)min=a[i];minpos=n;temp=ma*pos;ma*pos=minpos;minpos=temp;}returna[i];}8.10 *include<stdio.h>*defineN5voidmain(){inta[N][N];intsum=0;inti,j;printf谓输入一个%d*%d的矩阵\n",N,N);for(i=0;i<N;i++){for(j=0;j<N;j++){scanf("%d",&a[i][j]);}}for(i=0;i<N;i++){for(j=0;j<N;j++){if(i==j||i+j==N-1)sum=sum+a[i][j];}}printf对角线元素之和为：％d\n",sum);}8.11 *include<stdio.h>*defineN2*defineM3voidmain(){inta[N][M],b[N][M];inti,j,sum1=0,sum2=0,sum=0;prints#输入一个%d*%d的矩阵\n",N,M);for(i=0;i<N;i++){for(j=0;j<M;j++){scanf("%d",&a[i][j]);sum1=sum1+a[i][j];}}printf谓输入一个%d*%d的矩阵\n",N,M);for(i=0;i<N;i++){for(j=0;j<M;j++){scanf("%d",&b[i][j]);sum2=sum2+a[i][j];}}sum=sum1+sum2;printf("sum=%d\n",sum);}8.12 *include<stdio.h>*defineN7voidYangHui(inta[N][N],intn);voidmain(){inti,j,n,b[N][N];printf("Inputn:");scanf("%d",&n);YangHui(b,n);for(i=0;i<n;i++){for(j=0;j<=i;j++){printf("%4d",b[i][j]);}printf("\n");}}voidYangHui(inta[N][N],intn){inti,j;for(i=0;i<n;i++){a[i][0]=1;a[i][i]=1;}for(i=2;i<n;i++){for(j=1;j<i;j++)a[i][j]=a[i-1][j-1]+a[i-1][j];}}8.13 *include<stdio.h>*defineN12voidmain(){inti;intf[N]={1,1};printf("%d:%d\n",0,f[0]);printf("%d:%d\n",1,f[1]);for(i=2;i<N;i++){f[i]=f[i-1]+f[i-2];printf("%d:%d\n",i+1,f[i]);}}8.14*include<stdio.h>*include<stdlib.h>*include<time.h>*defineN60voidmain(){inta[N],i;intb1=0,b2=0,b3=0,b4=0,b5=0,b6=0;floatp1,p2,p3,p4,p5,p6;srand(time(NULL));for(i=0;i<N;i++){a[i]=rand()%6+1;printf("%3d",a[i]);if(a[i]==1)b1++;if(a[i]==2)b2++;if(a[i]==3)b3++;if(a[i]==4)b4++;if(a[i]==5)b5++;if(a[i]==6)b6++;p1=(float)(b1/60.0);p2=(float)(b2/60.0);p3=(float)(b3/60.0);p4=(float)(b4/60.0);p5=(float)(b5/60.0);p6=(float)(b6/60.0);}printf骰子出现1的概率%.2f\n",p1);printf骰子出现2的概率%.2f\n",p2);printf骰子出现3的概率%.2f\n",p3);printf骰子出现4的概率%.2f\n",p4);printf骰子出现5的概率%.2f\n",p5);printf骰子出现6的概率%.2f\n",p6);}9.1(1)voidSwap(int**,int*y){int*pTemp;//*pTem诔进行初始化，*pTemp指向哪里位置*pTemp=**;**=*y;*y=*pTemp;}9.1(2)voidSwap(int**,int*y){int*pTemp;pTemp=*;*=y;y=pTemp;}//错误， *include<stdio.h>*,y没main()有指向类型9.2int{inta[]={1,2,3,4,5};int*p=a;printf("%d,%d,%d,%d,%d,%d,%d\n",*p,*(++p),(*p)++,*p,*p--,--(*p),*p);return0;}9.3*include<stdio.h>voidSwap(int**,int*y);intmain(){inta[6]={1,2,3,4,5,6},b[6]={11,22,33,44,55,66};inti;printf("BeforeArray\n");for(i=0;i<6;i++){printf("%d\n",a[i]);}for(i=0;i<6;i++){printf("%d\n",b[i]);}for(i=0;i<6;i++){Swap(&a[i],&b[i]);}printf("AfterArray\n");for(i=0;i<6;i++){printf("%d\n",a[i]);}for(i=0;i<6;i++){printf("%d\n",b[i]);}return0;}voidSwap(int**,int*y){inttemp;temp=**;**=*y;*y=temp;}9.4*include<stdio.h>*defineN10voidFindMa*Min(inta[],int*pMa*a,int*pMa*num,int*pMina,int*pMinnum);intmain()inta[N];inti,ma*a,mina,ma*num,minnum;printf("Inputa:");for(i=0;i<10;i++){scanf("%d",&a[i]);}FindMa*Min(a,&ma*a,&ma*num,&mina,&minnum);printf("ma*a=%d,ma*num=%d,mina=%d,minnum=%d\n",ma*a,ma*num,mina,minnum);return0;}voidFindMa*Min(inta[],int*pMa*a,int*pMa*num,int*pMina,int*pMinnum){inti;*pMa*a=a[0];*pMina=a[0];*pMa*num=0;*pMinnum=0;for(i=0;i<10;i++){if(a[i]>*pMa*a){*pMa*a=a[i];*pMa*num=i;}elseif(a[i]<*pMina){*pMina=a[i];*pMinnum=i;}}}10.1voidMYStrcpy(char*dstStr,constchar*srcStr){while((*dstStr++=*srcStr++)!='\0'){}}10.2*include<stdio.h>main()(char*a="main(){char*a=%c%s%pc|ntf(a,34,a,34);}";printf(a,34,a,34);}10.3(1)unsignedintMyStrlen(char*p)main()unsignedintlen;len=0;for(;*pa!='\0';pa++){len++;}returnlen;}10.3(2)unsignedintMyStrlen(chars[]){char*p=s;while(*p!='\0'){p++;}return(p-*p);}10.3(3)intMyStrcmp(char*p1,char*p2){for(;*p1==*p2;p1++,p2++){if(*p1=='\0')return-1;}return1;}10.3⑷intMyStrcmp(chars[],chart[]){inti;for(i=0;s[i]==t[i];i++){if(s[i]=='\0return0;}returni;}10.3(5)*include<stdio.h>*include<string.h>intmain(){