1、精選優(yōu)質(zhì)文檔-傾情為你奉上二 2.1 #include <iostream.h> void main() /本題原考慮在 16 位機器上實驗目前多為 32 位機器故已過時。 int a = 42486; cout <<oct <<a <<endl <<hex <<a <<endl; unsigned b = 42486; cout << dec <<(signed)b <<endl; 2.2 #include <iostream.h> #include <i

2、omanip.h> const double pi = 3.; void main() double radius1, radius2; cout <<"please input two numbers:n" cin >>radius1 >>radius2; cout <<setw(10) <<pi <<setw(10) <<radius1 <<setw(10) <<(pi*radius1*radius1) <<endl <<setw(1

3、0) <<pi <<setw(10) <<radius2 <<setw(10) <<(pi*radius2*radius2) <<endl; 2.3 #include <iostream.h> #include <iomanip.h> const double e = 2.; void main() cout <<setprecision(10) <<e <<endl <<setiosflags(ios:fixed) <<setprecis

4、ion(8) <<e <<endl <<setiosflags(ios:scientific) <<e <<endl; 2.4 #include <iostream.h> void main() cout <<""How many students here?"n" <<""500"n" 2.5 #include <iostream.h> void main() cout <<"size

5、 of char " <<sizeof(char) <<" byten" <<"size of unsigned char " <<sizeof(unsigned char) <<" byten" <<"size of signed char " <<sizeof(signed char) <<" byten" <<"size of int " <<

6、;sizeof(int) <<" byten" <<"size of unsigned " <<sizeof(unsigned) <<" byten" <<"size of signed " <<sizeof(signed) <<" byten" <<"size of short " <<sizeof(short) <<" byten"

7、<<"size of unsigned short " <<sizeof(unsigned short) <<" byten" <<"size of long " <<sizeof(long) <<" byten" <<"size of signed long " <<sizeof(signed long) <<" byten" <<"size o

8、f unsigned long " <<sizeof(unsigned long) <<" byten" <<"size of float " <<sizeof(float) <<" byten" <<"size of double " <<sizeof(double) <<" byten" <<"size of long double " <<s

9、izeof(long double) <<" byten" 2.6 1) please input 3 sides of one triangle: 6,6,8 a= 6.00,b= 6.00,c= 8.00 area of triangle is 17.88854 2) 該程序計算三角形的面積前后分為三部分輸入處理輸出。 3) /#include <stdio.h> #include <iostream.h> #include <iomanip.h> #include <math.h> void main() f

10、loat a,b,c,s,area; /printf("please input 3 sides of one triangle:n"); cout <<"please input 3 sides of one triangle:n" /scanf("%f,%f,%f",&a,&b,&c); /輸入時以逗號作為數(shù)據(jù)間隔 cin >>a >>b >>c; /輸入時以空格作為數(shù)據(jù)間隔 s=(a+b+c)/2; area=sqrt(s*(s-a)*(s-b)*(s-c)

11、; /printf("a=%7.2f,b=%7.2f,c=%7.2fn",a,b,c); cout <<setiosflags(ios:fixed) <<setprecision(2) <<"a=" <<setw(7) <<a <<",b=" <<setw(7) <<b <<",c=" <<setw(7) <<c <<endl; /printf("area of

12、triangle is %10.5f",area); cout <<"area of triangle is " <<setw(10) <<setprecision(5) <<area <<endl; 4) #include <iostream.h> #include <iomanip.h> #include <math.h> float area(float a, float b, float c); /函數(shù)聲明 void main() float a,b,c; co

13、ut <<"please input 3 sides of one triangle:n" cin >>a >>b >>c; /輸入時以空格作為數(shù)據(jù)間隔 float result = area(a,b,c); /函數(shù)調(diào)用 cout <<setiosflags(ios:fixed) <<setprecision(2) <<"a=" <<setw(7) <<a <<",b=" <<setw(7) <&l

14、t;b <<",c=" <<setw(7) <<c <<endl; cout <<"area of triangle is " <<setw(10) <<setprecision(5) <<result <<endl; float area(float a, float b, float c) /函數(shù)定義 float s=(a+b+c)/2; return sqrt(s*(s-a)*(s-b)*(s-c); 2.7In main(): Enter

15、two numbers: 3 8 Calling add(): In add(),received 3 and 8 and return 11 Back in main(): c was set to 11 Exiting. 2.8 #include <iostream.h> #include <math.h> double Cylinder(double r, double h); void main() double radius, height; cout <<"請輸入圓柱體的半徑和高:n" cin >>radius &

16、gt;>height; double volume = Cylinder(radius, height); cout <<"該圓柱體的體積為" <<volume <<endl; double Cylinder(double r, double h) return r*r*M_PI*h; 三 3.1 (1) sqrt(pow(sin(x),2.5) (2) (a*x+(a+x)/(4*a)/2 (3) pow(c,x*x)/sqrt(2*M_PI) /M_PI 為 BC 中 math.h 中的圓周率常數(shù) 3.2 13.7 2.5 9

17、3.3 (1) a1=1 a2=1 (2) 1.1 (3) 2,0.0 (4) 20 3.4 #include <iostream.h> void main() int x; cout <<"please input x:n" cin >>x; if(x<=-1) cout <<(x-1) <<endl; if(x>-1 && x<=2) cout <<2*x <<endl; if(2<x && x<=10) cout <&

18、lt;x*(x+2); 3.5 #include <iostream.h> void main() int a; cout <<"please input a number:n" cin >>a; int c1 = a%3 =0; int c2 = a%5 =0; int c3 = a%7 =0; switch(c1<<2)+(c2<<1)+c3) case 0: cout <<"不能被 3,5,7 整除.n" break; case 1: cout <<"只能

19、被 7 整除.n" break; case 2: cout <<"只能被 5 整除.n" break; case 3: cout <<"可以被 5,7 整除.n" break; case 4: cout <<"只能被 3 整除.n" break; case 5: cout <<"可以被 3,7 整除.n" break; case 6: cout <<"可以被 3,5 整除.n" break; case 7: cout <

20、<"可以被 3,5,7 整除.n" break; 3.6 #include <iostream.h> void main() int grade; cout <<"please input a number:n" cin >>grade; if(grade>100|grade<0) cout <<"錯誤的成績.n" else if(grade>=90) cout <<"A.n" else if(grade>=80) cout

21、<<"B.n" else if(grade>=70) cout <<"C.n" else if(grade>=60) cout <<"D.n" else cout <<"E.n" 四 4.1 1 #include <iostream.h> #include <math.h> void main() double sum=1, t=-1, x; int i=1; cout <<"please input a va

22、lue:n" cin >>x; do t*=(-1)*x/i; sum+=t; i+; while(fabs(t)>1e-8); cout <<"sum=" <<sum<<endl; 2 #include <iostream.h> #include <math.h> void main() double sum=1, t=-1, x; cout <<"please input a value:n" cin >>x; int i=1; while

23、(fabs(t)>1e-8) t*=(-1)*x/i; sum+=t; i+; cout <<"sum=" <<sum<<endl; 3 #include <iostream.h> #include <math.h> void main() double sum=1, t=-1, x; cout <<"please input a value:n" cin >>x; for(int i=1; fabs(t)>1e-8; i+) t*=(-1)*x/i; sum

24、+=t; cout <<"sum=" <<sum<<endl; 4.2 #include <iostream.h> void main() long sum=0, t=1; for(int i=1; i<=15; i+) t*=i; sum+=t; cout <<"sum=" <<sum <<endl; 4.3 #include <iostream.h> void main() for(int i=1; i<=9; i+) for(int j=0;

25、 j<=9; j+) for(int k=0; k<=9; k+) if(i*i*i+j*j*j+k*k*k = 100*i+10*j+k) cout <<(100*i+10*j+k) <<"是水仙花數(shù).n" 4.4 #include <iostream.h> void main() for(int i=1; i<1000; i+) int sum=0; for(int j=1; j<=i/2; j+) if(i%j=0) sum+=j; if(sum=i) cout <<i<<"

26、是完數(shù).n" 4.5 #include <iostream.h> void main() float s=100,h=100; for(int i=1; i<10; i+) s+=h; h/=2; cout <<"共經(jīng)過" <<s <<"米第 10 次反彈" <<h <<"米高.n" 4.6 #include <iostream.h> void main() int peachs=1; for(int i=1; i<10; i+)

27、 peachs=(peachs+1)*2; cout <<"第一天共摘下" <<peachs <<"個桃子.n" 4.7 #include <iostream.h> #include <math.h> void main() double x, a; cout <<"please input a value:n" cin >>a; x = a/2; while(fabs(x-a/x)/2)>1e-7) x=(x+a/x)/2; cout <

28、<a <<"的平方根是" <<x <<endl; 4.8 1 #include <iostream.h> void main() for(int i=1; i<=10; i+) for(int j=1; j<=10-i; j+) cout <<" " for(int j=1; j<=2*i-1; j+) cout <<"#" cout <<endl; 2 #include <iostream.h> void main

29、() for(int i=1; i<=8; i+) for(int j=1; j<=i; j+) cout <<" " for(int j=1; j<=18-i; j+) cout <<"#" cout <<endl; 4.9 1 #include <iostream.h> #include <iomanip.h> void main() cout <<" *" for(int i=1; i<=9; i+) cout <<set

30、w(4) <<i; cout <<"n-n" for(int i=1; i<=9; i+) cout <<setw(3) <<i; for(int j=1; j<=9; j+) cout <<setw(4) <<i*j; cout <<endl; 2 #include <iostream.h> #include <iomanip.h> void main() cout <<" *" for(int i=1; i<=9;

31、 i+) cout <<setw(4) <<i; cout <<"n-n" for(int i=1; i<=9; i+) cout <<setw(3) <<i; for(int j=1; j<=i; j+) cout <<setw(4) <<i*j; cout <<endl; 3 #include <iostream.h> #include <iomanip.h> void main() cout <<" *"

32、for(int i=1; i<=9; i+) cout <<setw(4) <<i; cout <<"n-n" for(int i=1; i<=9; i+) cout <<setw(3) <<i; if(i!=1) cout <<setw(4*i-4) <<" " for(int j=i; j<=9; j+) cout <<setw(4) <<i*j; cout <<endl; 4.10 #include <io

33、stream.h> void main() int n; long a=1, b=1, c=1, temp; cout <<"please input a value:n" cin >>n; for(int i=4; i<=n; i+) temp=a+c; a=b; b=c; c=temp; cout << c <<endl; 五 5.1 #include <iostream.h> #include <iomanip.h> #include <math.h> bool ispri

34、me(long n); void main() /input long a,b,l=0; cout <<"please input two numbers:n" cin >>a >>b; cout <<"primes from " <<a <<" to " <<b <<" is n" /process if(a%2=0) a+; for(long m=a; m<=b; m+=2) if(isprime(m) /ou

35、tput if(l+%10=0) cout <<endl; cout <<setw(5) <<m; bool isprime(long n) int sqrtm=sqrt(n); for(int i=2; i<=sqrtm; i+) /判明素數(shù) if(n%i=0) return false; return true; 5.2 #include <iostream.h> #include <iomanip.h> #include <math.h> double f(double x); double integral(

36、double a, double b); const double eps = 1e-8; void main() double a=0, b=1; cout <<"the integral of f(x) from " <<a <<" to " <<b <<" is n" <<setiosflags(ios:fixed) <<setprecision(8) <<setw(8) <<integral(a,b) <<e

37、ndl; double f(double x) return exp(x)/(1+x*x); double integral(double a, double b) int n=1; double h,tn,t2n,i2n,in=0; h = b-a; t2n = i2n = h*(f(a)+f(b)/2; while(fabs(i2n-in)>=eps) tn = t2n; in = i2n; double sigma = 0.0; for(int k=0; k<n; k+) double x = a+(k+0.5)*h; sigma += f(x); t2n = (tn+h*s

38、igma)/2.0; /變步長梯形 i2n = (4*t2n-tn)/3.0; /辛普生公式 n *= 2; h /= 2; return i2n; 5.3 #include <iostream.h> #include <iomanip.h> void multab1(); void multab2(); void multab3(); void main() multab1(); multab2(); multab3(); void multab1() cout <<" *" for(int i=1; i<=9; i+) cout

39、 <<setw(4) <<i; cout <<"n-n" for(int i=1; i<=9; i+) cout <<setw(3) <<i; for(int j=1; j<=9; j+) cout <<setw(4) <<i*j; cout <<endl; cout <<endl <<endl; void multab2() cout <<" *" for(int i=1; i<=9; i+) cout

40、<<setw(4) <<i; cout <<"n-n" for(int i=1; i<=9; i+) cout <<setw(3) <<i; for(int j=1; j<=i; j+) cout <<setw(4) <<i*j; cout <<endl; cout <<endl <<endl; void multab3() cout <<" *" for(int i=1; i<=9; i+) cout &

41、lt;<setw(4) <<i; cout <<"n-n" for(int i=1; i<=9; i+) cout <<setw(3) <<i; if(i!=1) cout <<setw(4*i-4) <<" " for(int j=i; j<=9; j+) cout <<setw(4) <<i*j; cout <<endl; cout <<endl <<endl; 5.4 Main-x=5,y=1,n=1

42、 Func-x=6,y=21,n=11 Main-x=5,y=1,n=11 Func-x=8,y=31,n=21 5.5#include <iostream.h>void main() int n; long a=1, b=1, temp; cout <<"please input a number:n" cin >>n; for(int i=3; i<=n; i+) temp=a+b; a=b; b=temp; cout <<b <<endl; 5.6 double poly(int n, double)

43、if(n=0) return 1; if(n=0) return x; return (2*n-1)*x*poly(n-1,x)-(n-1)*poly(n-2,x)/n; 5.7 #include <iostream.h> #include <math.h> void main() double x, y; x = 3.14159/4; do y = x; /x-=(cos(x)-x)/(sin(x)-1); x = cos(x); while(fabs(x-y)>1e-6); cout <<x <<endl; /答案為: 0. 5.8 #

44、include <iostream.h> void display(double d) cout <<"A double: " <<d <<endl; void display(int i) cout <<"A int: " <<i <<endl; void display(char c) cout <<"A char: " <<c <<endl; void main() double a=100.0; float

45、f=1.0; int n=120; char ch='c' short s=50; display(a); display(f); display(n); display(ch); display(s); 5.9 #include <iostream.h> long cattle(int n); void main() int n; cout <<"please input a number:n" cin >>n; cout <<cattle(n) <<endl; long cattle(int n

46、) if(n<=0) return 0; if(n<=3) return 1; return cattle(n-1)+cattle(n-3); 六 6.1(1) /file1.cpp int x=1; int func() /. /file2.cpp extern int x; int func(); void g() x=func(); /file3.cpp extern int x=2; /error: extern int 變量若有賦值則成定義 int g(); /error: 函數(shù)聲明與前面不一致 void main() x=g(); /. (2) /file1.cpp i

47、nt x=5; int y=8; extern int z; /file2.cpp int x; /error: int x;重復定義 extern double y; /error: y 同一名字不同類型定義 extern int z; /error: z 只有聲明卻無定義 6.2 25 6.3 #include "multab.h" void main() multab1(); multab2(); multab3(); /6_3_1 #include "multab.h" void multab1() cout <<" *&q

48、uot; for(int i=1; i<=9; i+) cout <<setw(4) <<i; cout <<"n-n" for(int i=1; i<=9; i+) cout <<setw(3) <<i; for(int j=1; j<=9; j+) cout <<setw(4) <<i*j; cout <<endl; cout <<endl <<endl; /6_3_2 #include "multab.h" vo

49、id multab2() cout <<" *" for(int i=1; i<=9; i+) cout <<setw(4) <<i; cout <<"n-n" for(int i=1; i<=9; i+) cout <<setw(3) <<i; for(int j=1; j<=i; j+) cout <<setw(4) <<i*j; cout <<endl; cout <<endl <<endl; /6_

50、3_3 #include "multab.h" void multab3() cout <<" *" for(int i=1; i<=9; i+) cout <<setw(4) <<i; cout <<"n-n" for(int i=1; i<=9; i+) cout <<setw(3) <<i; if(i!=1) cout <<setw(4*i-4) <<" " for(int j=i; j<=9;

51、j+) cout <<setw(4) <<i*j; cout <<endl; cout <<endl <<endl; /6_3.h #include <iostream.h> #include <iomanip.h> void multab1(); void multab2(); void multab3(); 七 7.1 #include <iostream.h> int findMinIndex(int a, int n); void main() int array=34,91,83,56,2

52、9,93,56,12,88,72; int size=sizeof(array)/sizeof(*array); int minIndex = findMinIndex(array, size); cout <<"最小數(shù): " <<arrayminIndex <<endl <<"相應的下標: " <<minIndex <<endl; int findMinIndex(int a, int n) int index = 0; for(int i=1; i<n; i+) if(ai

53、ndex>ai) index = i; return index; 7.2 #include <iostream.h> int insert(int a, int n, int value); void main() int array=12,29,34,56,72,83,88,91; int size=sizeof(array)/sizeof(*array); cout <<"插入前的數(shù)組:n" for(int i=0; i<size; i+) cout <<arrayi <<" " int

54、aValue; cout <<"nplease input a number :n" cin >>aValue; int max=insert(array,size,aValue); cout <<"n 最大數(shù): " <<max <<endl; cout <<"插入后的數(shù)組:n" for(int i=0; i<size; i+) cout <<arrayi <<" " int insert(int a, int n

55、, int value) if(an-1<=value) return value; int retValue = an-1; int i; for(i=n-2; i>=0&&ai>value; i-) ai+1=ai; ai+1=value; return retValue; 7.3 #include <iostream.h> const int num=17; void main() int interval=3; int anum; for(int i=0; i<num; i+) cout <<(ai=i+1) <&l

56、t;"," cout <<endl; int i=(interval-1)%num; for(int k=1; k<num; k+) cout <<ai <<"," ai=0; for(int j=1; !(ai&&(j+=interval); i=(i+1)%num); /數(shù)數(shù) cout <<"nNo." <<ai <<" boy has won.n" /輸出勝利者 7.4 void Swap(int& a, i

57、nt& b) int temp=a; a=b; b=temp; void Bsort(int a, int n) bool dontLoopAgain=false; while(dontLoopAgain=!dontLoopAgain) for(int i=0,pass=-n; i<n; i+) if(ai>ai+1) dontLoopAgain=false; Swap(ai,ai+1); 7.5 #include <iostream.h> const int n=5; int sum(int a5, int size); void main() int arr

58、aynn=3,2,4,1,5, 8,7,2,5,6, 6,9,1,4,3, 5,5,3,6,2, 2,8,1,8,6; cout <<sum(array,n); int sum(int a5, int size) int s=0; for(int i=0; i<size; i+) s+=aii+aisize-i-1; if(size%2=1) s-=asize/2size/2; return s; 7.6 #include <iostream.h> void findMax(int a4, int row,int col); void findBad(int a4

59、, int row,int col); void average(int a4, int row,int col); void main() int array54=88,67,48,91, 61,65,37,77, 92,81,73,60, 51,55,60,60, 77,63,70,80; findMax(array,5,4); findBad(array,5,4); average(array,5,4); void findMax(int a4, int row,int col) int r=0,c=0; for(int i=0; i<row; i+) for(int j=0; j

60、<col; j+) if(aij>arc) r=i,c=j; cout <<"成績最高的學生序號: " <<(r+1) <<" " for(int i=0; i<col; i+) cout <<ari<<" " cout <<endl; void findBad(int a4, int row,int col) for(int i=0; i<row; i+) for(int j=0; j<col; j+) if(aij<60) cout <<"有不及格課程的學生序號: " <<(i+1) <<" " for(int k=0; k<col; k+) cout <<aik <<" " cout <<endl; break; void average(int a4, int row,int col) double