C语言程序的设计苏小红版答案

1、.2.2 *include<stdio.h>main()float x=2.5,y=2.5,z=2.5;printf("x=%fn",x);printf("y=%fn",y);printf("z=%fn",z);3.1(1) *include<stdio.h>main()int a=12,b=3;float x=18.5,y=4.6;printf("%dn",(float)(a*b)/2);printf("%dn",(int)x%(int)y);3.2 *include&

2、lt;stdio.h>main()int x,b0,b1,b2,s;printf("Inputx:");scanf("%d",&x);b2=x/100;b1=(x-b2*100)/10;b0=x%10;s=b0*100+b1*10+b2;printf("s=%dn",s);3.3 *include<stdio.h>*include<math.h>main()float rate=0.0225;float n,capital,deposit;printf("Input n,capital:

3、");scanf("%f,%f",&n,&capital);deposit=capital*pow(1+rate,n);printf("deposit=%fn",deposit);3.4 *include<stdio.h>*include<math.h>main()float a,b,c;double x,y;printf("Inputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);x=(-b+sqrt(b*b-4*a

4、*c)/(2*a);y=(-b-sqrt(b*b-4*a*c)/(2*a);printf("x=%f,y=%fn",x,y);4.1(1) *include<stdio.h>main()char c1='a',c2='b',c3='c'printf("a%cb%cc%cn",c1,c2,c3);4.1(2) *include<stdio.h>main()int a=12,b=15;printf("a=%d%,b=%d%n",a,b);4.1(3) *include

5、<stdio.h>main()int a,b;scanf("%2d%*2s%2d",&a,&b);printf("%d,%dn",a,b);4.2 *include<stdio.h>main()long a,b;float x,y;scanf("%d,%dn",&a,&b);scanf("%f,%fn",&x,&y);printf("a=%d,b=%dn",a,b);printf("x=%f,b=%fn"

6、,x,y);5.1 *include<stdio.h>main()float a;printf("Innputa:");scanf("%f",&a);if(a>=0)a=a;printf("a=%fn",a);elsea=-a;printf("a=%fn",a);5.2 *include<stdio.h>main()int a;printf("Inputa:");scanf("%d",&a);if(a%2=0)printf(&qu

7、ot;a是偶数");elseprintf("a是奇数");5.3 *include<stdio.h>*include<math.h>main()float a,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);prin

8、tf("area=%fn",area);elseprintf("不是三角形");5.4 *include<stdio.h>*include<math.h>main()float a,b,c,x,y;printf("Inputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);if(a=0)printf("该方程不是一元二次方程n");if(b*b-4*a*c>0)x=(-b+sqrt(b*b-4*a*c)/(2*a); y

9、=(-b-sqrt(b*b-4*a*c)/(2*a);printf("x=%f,y=%fn",x,y);else if(b*b-4*a*c=0)x=-b/(2*a); y=-b/(2*a);printf("x=%f,y=%fn",x,y);elseprintf("该方程无实根n");5.5 *include<stdio.h>main()int year,flag;printf("Input a year:");scanf("%d",&year);if(year%4=0&

10、;&year%400!=0|year%400=0)flag=1;elseflag=0;if(flag=1)printf("%d is a leap year !n",year);elseprintf("%d is not a leap year !n",year);5.6 *include<stdio.h>main()int year,flag;printf("Input a year:");scanf("%d",&year);flag=year%400=0|year%4=0&&

11、amp;year%100!=0"1:0;if(flag=1&&flag!=0)printf("%d is a leap year !n",year); elseprintf("%d is not a leap year !n",year);5.7 *include<stdio.h>main()char ch;printf("Inputch:");scanf("%c",&ch);if(ch>='a'&&ch<='z

12、9;)ch=getchar();ch=ch-32;printf("%c,%dn",ch,ch); else if(ch>='A'&&ch<='Z')ch=getchar();ch=ch+32;printf("%c,%dn",ch,ch);elseprintf("%c",ch);5.8 *include<stdio.h>main()char ch;printf("Inputch:");scanf("%c",&ch);i

13、f(ch>=48&&ch<=57)printf("ch是数字字符n"); else if(ch>=65&&ch<=90)printf("ch是大写字母n"); else if(ch>=97&&ch<=122)printf("ch是小写字母n"); else if(ch=32)printf("ch是空格n");else printf("ch是其他字符n");5.9 *include<stdio.h>ma

14、in()int score,grade;printf("Input score:");scanf("%d",&score);grade=score/10;if(score<0|score>100) printf("Input errorn"); if(score>=90&&score<=100)printf("%d-An",score); else if(score>=80&&score<90)printf("%d-Bn"

15、;,score); else if(score>=70&&score<80)printf("%d-Cn",score); else if(score>=60&&score<70)printf("%d-Dn",score);else if(score>=0&&score<60)printf("%d- -En",score);5.10 *include<stdio.h>main()int year,month;printf("Inpu

16、t year,month:");scanf("%d,%d",&year,&month); if(month>12|month<=0)printf("error monthn"); else switch(year,month)case 12:case 10:case 8:case 7:case 5:case 3:case 1:printf("31天n");break;case 11:case 9:case 6:case 4:printf("30天n"); break;case

17、2:if(year%4=0&&year!=0|year%400=0)printf("29天n");elseprintf("28天n"); break; default: printf("Input errorn"); 6.1(1) *include<stdio.h>main()int i,j,k;char space=' 'for(i=1;i<=4;i+)for(j=1;j<=i;j+)printf("%c",space);for(k=1;k<=6;k+

18、)printf("*");printf("n");6.1(2) *include<stdio.h>main()int k=4,n;for(n=0;n<k;n+)if(n%2=0) continue;k-;printf("k=%dn,n=%dn",k,n);6.1(3) *include<stdio.h>main()int k=4,n;for(n=0;n<k;n+)if(n%2=0) break;k-;printf("k=%d,n=%dn",k,n);6.2(1) *include

19、<stdio.h>main()int i,sum=0;for(i=1;i<=101;i+)sum=sum+i;printf("sum=%dn",sum);6.2(2) *include<stdio.h>main()long i;long term,sum=0;for(i=1;i<=101;i=i+2)term=i*(i+1)*(i+2);sum=sum+term;printf("sum=%ldn",sum);6.2(4) *include<stdio.h>*include<math.h>main

20、()int n=1;float term=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=%fn",sum);6.2(5) *include<stdio.h>*include<math.h>main()int n=1,count=1;float x;double sum,term;printf("Input x:");scanf("%f",&

21、x);sum=x;term=x;doterm=-term*x*x/(n+1)*(n+2); sum=sum+term;n=n+2;count+;while(fabs(term)>=1e-5);printf("sin(x)=%f,count=%dn",sum,count);6.3 *include<stdio.h>main()int x=1,find=0; while(!find)if(x%2=1&&x%3=2&&x%5=4&&x%6=5&&x%7=0)printf("x=%dn&qu

22、ot;,x);find=1;x+;/*int x,find=0;for (x=1;!find;x+)if(x%2=1&&x%3=2&&x%5=4&&x%6=5&&x%7=0)printf("x=%dn",x);find=1;*/6.4 *include<stdio.h>main()int i,n;long p=1,m=1;printf("Input n:");scanf("%d",&n);for(i=1;i<=n;i+)p=i*i;m=i*i*i

23、;printf("p=%d,m=%dn",i,p,i,m);6.5 *include<stdio.h>main()float c,f;for(c=-40;c<=110;c=c+10)f=9/5*c+32;printf("f=%fn",f);6.6 *include<stdio.h>*include<math.h>main()int n;double c=0.01875,x;dox=x*pow(1+c,12)-1000;n+;while(x>0);printf("x=%dn",x);6.7

24、 *include<stdio.h>main()int n=0;float a=100.0,c;printf("Inputc:");scanf("%f",&c);doa=a*(1+c);n+;while(a<=200);printf("n=%dn",n);6.8 *include<stdio.h>*include<math.h>main()int n=1,count=1;double sum=1,term=1;while(fabs(term)>=1e-5)term=pow(-1,

25、count)*(1.0/(n+2);sum=sum+term;n=n+2;count+; sum=4*sum;printf("sum=%f,count=%dn",sum,count);6.9 *include<stdio.h>*include<math.h>main()int n=1,count=1;double sum=1,term=1;while(fabs(term)>=1e-5)term=term*(1.0/n);sum=sum+term; n+;count+;printf("sum=%f,count=%dn",sum

26、,count);6.10 *include<stdio.h>*include<math.h>main()int x;for(x=100;x<=999;x+)if(x=pow(x/100,3)+pow(x/10%10,3)+pow(x%10,3)printf("x=%dn",x);6.11 *include<stdio.h>main()int i=0,n;long sum=0,term=1;printf("Inputn:");scanf("%d",&n);doi+;term=term*i

27、;sum=sum+term;while(sum<n);printf("%dn",i-1);6.12 *include<stdio.h>main()int i,n,m,count=0,sum=0;printf("Input n:");scanf("%d",&n);for(i=1;i<=n;i+)printf("Inputm:"); scanf("%d",&m);if(m>0)sum=sum+m;count+;elsebreak;printf("

28、;sum=%d,count=%dn",sum,count);6.13 *include<stdio.h>main()int i,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+;elsebreak;printf("sum=%d,count=%dn

29、",sum,count);6.14 *include<stdio.h>main()int x,y,z;for(x=0;x<=17;x+)for(y=0;y<=25;y+)3*x+2*y+z=50;z=30-x-y;if(3*x+2*y+z=50&&x+y+z=30)printf("x=%d,y=%d,z=%dn",x,y,z);6.15 *include<stdio.h>main()int x,y;for(x=0;x<=98;x+)y=98-x;2*x+4*y=386;if(x+y=98&&

30、2*x+4*y=386)printf("x=%d,y=%dn",x,y);6.16 *include<stdio.h>main()int x,y,z;for(x=0;x<=20;x+)for(y=0;y<=33;y+) 3*y+5*x+z/3.0=100; z=100-x-y; if (5*x+3*y+z/3.0=100&&z+x+y=100) printf("x=%d,y=%d,z=%dn",x,y,z); 6.17 *include<stdio.h>main()int x,y,z;for(x=1;x

31、<=9;x+)for(y=1;y<=17;y+)10*x+5*y+z=100; z=50-x-y;if(10*x+5*y+z=100&&x+y+z=50&&z>0) printf("x=%d,y=%d,z=%dn",x,y,z);7.1 *include<stdio.h>int Square(int i)return i*i;int main()int i=0;i=Square(i);for( ;i<3;i+)static int i=1;i+=Square(i);printf("%d,"

32、;,i);printf("%dn",i);return 0;7.2 *include<stdio.h>int hour,minute,second;void update()second+;if(second=60)second=0;minute+;if(minute=60)minute=0;hour+;if(hour=24)hour=0;void display()printf("%d,%d,%dn",hour,minute,second);void delay()int t;for(t=0;t<100000000;t+);int m

33、ain()int i;void updaye(),display(),delay();for(i=0;i<1000000;i+)update();display();delay();return 0;7.3 *include<stdio.h>int GetMax(int a,int b);int main()int x,y,max;printf("Inputx,y:");scanf("%d,%d",&x,&y);max=GetMax(x,y);printf("max=%dn",max);return

34、0;int GetMax(int m,int n)if(m>=n)return m;else return n;7.4 *include<stdio.h>int LCM(int n,int m);int main()int a,b;printf("Inputa,b:");scanf("%d,%d",&a,&b);printf("%dn",LCM(a,b);return 0;int LCM(int n,int m)int x;int find=0;for(x=1;!find;x+)if(x%n=0&am

35、p;&x%m=0) find=1;return x-1;7.5 *include<stdio.h>long Fact(int n);int main()int m,a;printf("Inputm:");scanf("%d",&m);for(a=1;a<=m;a+) printf("%d!=%ldn",a,Fact(a);return 0;long Fact(int n)int i;long result=1;for(i=2;i<=n;i+)result*=i;return result;7.6

36、 *include<stdio.h>long Fact(int n);int main()int m;long ret;printf("Inputm:");scanf("%d",&m);ret=Fact(m);printf("ret=%dn",ret);return 0;long Fact(int n)int i;long result=1,sum=0;for(i=2;i<=n;i+)result*=i;sum=sum+result;return sum;7.7(1) *include<stdio.h&

37、gt;int Gcd(int a,int b);int main()int m,n;printf("Inputm,n:");scanf("%d,%d",&m,&n);printf("%dn",Gcd(m,n);return 0;int Gcd(int a,int b)int t,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)return t;find=1;7.7(2) *inclu

38、de<stdio.h>int Gcd(int a,int b);int main()int m,n;printf("Inputm,n:");scanf("%d,%d",&m,&n);printf("%dn",Gcd(m,n);return 0;int Gcd(int a,int b)int r,temp;r=a%b;if(r=0)return b;elsedotemp=b; b=r;a=temp;r=a%b;while(r!=0);return b;8.1(1) *include<stdio.h>

39、;void Func(int x)x=2;int main()int x=10;Func(x);printf("%d",x);return 0;8.1(2) *include<stdio.h>void Func(int b)int j;for(j=0;j<4;j+)bj=j;int main()static int a=5,6,7,8,i;Func(a);for(i=0;i<4;i+)printf("%d",ai);return 0;8.2(1) int PositiveNum(int a,int n)int i,count=0;

40、for(i=0;i<n;i+)if(ai>0)count+;return 0;8.2(2) void Fib(long f,long n)int i;f0=0;f1=1;for(i=2;i<n;i+)fi=fi-1+fi-2;8.2(3) *include<stdio.h>int main()int a10,n,max,min,maxPos,minPos;for(n=0;n<10;n+)scanf("%d",&an);max=min=a0;maxPos=minPos=0;for(n=0;n<10;n+)if(an>ma

41、x)max=an;maxPos=n;else if(an<min)min=an;minPos=n;printf("max=%d,pos=%dn",max,maxPos);printf("min=%d,pos=%dn",min,minPos);return 0;8.3 void DivArray(int *pArray,int n)int i;for(i=0;i<n;i+)pArrayi/=pAttay0;8.4 *include<stdio.h>*define N 40int FailNum(int score,int n);vo

42、id ReadScore(int score,int n);int main()int scoreN,n;printf("Input n:");scanf("%d",&n);ReadScore(score,n);FailNum(score,n);printf("FailNum students are %dn",FailNum(score,n);return 0;int FailNum(int score,int n)int i,count=0;for(i=0;i<n;i+)if(scorei<60)count+;

43、return count;void ReadScore(int score,int n)int i;printf("Input score:");for(i=0;i<n;i+)scanf("%d",&scorei);8.5 *include<stdio.h>*define N 40int HighAver(int score,int n);int ReadScore(int score);int main()int scoreN,n;n=ReadScore(score);printf("HighAver student

44、s are %dn",HighAver(score,n);return 0;int HighAver(int score,int n)int i,count=0,sum=0,aver;for(i=0;i<n;i+)sum=sum+scorei;aver=sum/n;for(i=0;i<n;i+)if(scorei>aver)count+;return count;int ReadScore(int score)int i=-1;doi+;printf("Input score:");scanf("%d",&scorei

45、);while(scorei>=0);return i;8.6 *include<stdio.h>*define N 40int ReadScore(int score,long num);int FindMax(int score,long num,int n);int main()int scoreN,n,max,num,t;long numN;t=FindMax(score,n);max=scoret;num=numt;printf("max=%d,num=%dn",max,num);return 0;int ReadScore(int score,

46、long num)int i=-1;doi+;printf("Input student's ID and score:");scanf("%ld%d",&numi,&scorei);while(numi>0&&scorei>=0);return i;int FindMax(int score,long num,int n)int max,i;max=score0;for(i=1;i<n;i+)if(scorei>max)max=scorei;return i;8.7 *include<

47、;stdio.h>*define N 40int Read(int a);int ChangeArry(int a,int n);int main()int aN,n;printf("%dn",ChangeArry(a,n);return 0;int Read(int a)int i;for(i=0;i<9;i+)printf("Input a:");scanf("%d",&ai);return i;int ChangeArry(int a,int n)int max,min,i,maxpos,minpos,ter

48、m;max=min=score0;for(i=1;i<n;i+)if(ai>max)max=scorei;maxpos=n;else(ai<min)min=ai;minpos=n;temp=maxpos;maxpos=minpos;minpos=temp;return ai;8.10 *include<stdio.h>*define N 5void main()int aNN;int sum = 0;int i, j; printf("请输入一个%d*%d的矩阵n",N,N);for(i = 0; i < N; i+)for(j = 0;

49、 j < N; j+)scanf("%d",&aij);for(i = 0; i < N; i+)for(j = 0; j < N; j+)if(i = j | i + j = N - 1)sum=sum+aij;printf("对角线元素之和为：%dn",sum);8.11 *include<stdio.h>*define N 2*define M 3void main()int aNM,bNM;int i,j,sum1=0,sum2=0,sum=0;printf("请输入一个%d*%d的矩阵n"

50、;,N,M);for(i = 0; i<N; i+)for(j = 0; j< M; j+)scanf("%d",&aij);sum1=sum1+aij;printf("请输入一个%d*%d的矩阵n",N,M);for(i = 0; i <N; i+)for(j = 0; j <M; j+)scanf("%d",&bij);sum2=sum2+aij;sum=sum1+sum2;printf("sum=%dn",sum);8.12 *include<stdio.h>

51、;*define N 7void YangHui(int aNN,int n);void main()int i,j,n,bNN;printf("Input n:");scanf("%d",&n);YangHui(b,n);for(i=0;i<n;i+)for(j=0;j<=i;j+)printf("%4d",bij);printf("n");void YangHui(int aNN,int n)int i,j;for(i=0;i<n;i+)ai0=1;aii=1;for(i=2;i<

52、;n;i+)for(j=1;j<i;j+)aij=ai-1j-1+ai-1j;8.13 *include<stdio.h>*define N 12void main()int i;int fN=1,1;printf("%d:%dn",0,f0);printf("%d:%dn",1,f1);for(i=2;i<N;i+)fi=fi-1+fi-2;printf("%d:%dn",i+1,fi);8.14 *include<stdio.h>*include<stdlib.h>*include&

53、lt;time.h>*define N 6000void main()int aN,i;int b1=0,b2=0,b3=0,b4=0,b5=0,b6=0;float p1,p2,p3,p4,p5,p6;srand(time(NULL);for(i=0;i<N;i+)ai=rand()%6+1;printf("%3d",ai);if(ai=1)b1+;if(ai=2) b2+;if(ai=3)b3+;if(ai=4)b4+;if(ai=5)b5+;if(ai=6)b6+;p1=(float)(b1/6000.0);p2=(float)(b2/6000.0);p3=(float)(b3/6000.0);p4=(float)(b4/6000.0);p5=(float)(b5/6000.0);p6=(float)(b6/6000.0);printf("骰子出现1的概率：%.2fn",p1);printf("骰子出现2的概率：%.2fn",p2);printf("骰子出现3的概率：%.2fn",p3);printf("骰子出现4的概率：%.2fn",p4);printf("骰子出现5的概率：%.2fn",p5);printf("骰子出现6的概率