北邮计算机院C++小学期

1、一1.cpp#include#includeusing namespace std;main() int m; srand(time(NULL);/产生随机数种子 m=rand()%1000+1; cout*猜数字游戏*endl; coutn; while(n1000|n1)/数据合法性判断 cout你输入的数据不合理，请重新输入n; while(m!=n) if(mn) cout)oendl; if(mn) cout)on; cout你好聪明呀，终于猜对啦()endl; system(pause); return 0; 一2.cpp#include#includeusing namespac

2、e std； class Point/点类 public: Point(float X,float Y) x=X; y=Y; float getX()return x; float getY()return y; float distance(Point A,Point B) return sqrt(A.getX()-B.getX()*(A.getX()-B.getX()+(A.getY()-B.getY()*(A.getY()-B.getY(); Point()/构造函数 coutPoint析构函数被调用endl; Point()/析构函数 coutpoint析构函数被调用endl; pri

3、vate: float x; float y;class square/矩形类 public: void putA(Point a)A=a; void putB(Point b)B=b; float S(Point A,Point B); square()/构造函数 coutsquare调用了构造函数endl; square()/析构函数 coutsquare调用了析构函数endl; private: Point A; Point B; float square:S(Point A,Point B)/计算矩形的面积 float L,W; L=B.getX()-A.getX();/ 长 W=B.

4、getY()-A.getY();/宽 if(L0|W0) return 0; return (L*W); int main() float x1,y1,x2,y2; square C; coutx1y1; Point A(x1,y1); coutx2y2; Point B(x2,y2); float square; cout两点间的距离是：; coutA.distance(A,B)endl; square=C.S(A,B); if(square=0) cout你输入的两个点是无效的-_-|endl; else cout矩形的面积是：; coutsquareendl; system(pause)

5、; return 0;一3.cpp#includeusing namespace std;class Car;class Boat friend double sum(Boat a,Car b);/友元函数 private: double weight; public: void set(double a)weight=a; ;class Car friend double sum(Boat a,Car b); /友元函数 private: double weight; public: void set(double a)weight=a; ;double sum(Boat a,Car b)

6、return a.weight+b.weight;int main() Boat a; Car b; double m,n; coutm; a.set(m); coutn; b.set(n); cout两者的质量之和:; coutsum(a,b)endl; system(pause); return 0; 二1.cpp#includeusing namespace std;void init(int m45)/矩阵的初始化函数 for(int i=0;i=3;i+) for(int j=0;jmij;void output(int m45) for(int i=0;i=3;i+) for(in

7、t j=0;j=4;j+) coutmij ; coutendl; void add(int m45,int n45,int p45)for(int i=0;i=3;i+) for(int j=0;j=4;j+) pij=mij+nij; output(p);void subtract(int m45,int n45,int p45)for(int i=0;i=3;i+) for(int j=0;j=4;j+) pij=mij-nij; output(p);main()int A145,A245,A345;cout初始化A1数组:endl; init(A1);cout初始化A2数组:endl;

8、init(A2);coutA1和A2的数组之和:endl;add(A1,A2,A3);coutA1和A2的数组之差:endl; subtract(A1,A2,A3);二2.cpp#include #include using namespace std; void init(int *p)/初始化 for(int i=0;i=3;i+) for(int j=0;jpij; void output(int *p) for(int i=0;i=3;i+) for(int j=0;j=4;j+) coutpij ; coutendl; void add(int *m,int *n,int *p)fo

9、r(int i=0;i=3;i+) for(int j=0;j=4;j+) pij=mij+nij; output(p); void subtract(int *m,int *n,int *p) for(int i=0;i=3;i+) for(int j=0;j=4;j+) pij=mij-nij; output(p); main() int *A1; int *A2; int *A3; A1=new int*4; for(int i=0;i=3;i+) A1i=new int5; A2=new int*4; for(int i=0;i=3;i+) A2i=new int5; A3=new i

10、nt*4; for(int i=0;i=3;i+) A3i=new int5; cout初始化A1数组:endl; init(A1);cout初始化A2数组:endl;init(A2);coutA1和A2的数组之和:endl;add(A1,A2,A3);coutA1和A2的数组之差:endl; subtract(A1,A2,A3); /释放内存部分 for(int i=0;i=3;i+) delete A15;delete A1;for(int i=0;i=3;i+) delete A25;delete A2;for(int i=0;i=3;i+) delete A35;delete A3;r

11、eturn 0; 二3.cpp#include#includeusing namespace std;class matrix private: int line,row; public: int *m;/二维数组指针matrix(int x,int y) /带参数的构造函数 line=x;row=y;m=new int *line;for(int i=0;iline;i+) mi=new introw; void init()/初始化函数 cout输入矩阵元素:endl; for(int i=0;iline;i+) for(int j=0;jmij; void output() for(in

12、t i=0;iline;i+) for(int j=0;jrow;j+) coutmij ; coutendl; void add(matrix &a,matrix &b) for(int i=0;iline;i+) for(int j=0;jrow;j+) mij=a.mij+b.mij; void subtract(matrix &a,matrix &b) for(int i=0;iline;i+) for(int j=0;jrow;j+) mij=a.mij-b.mij; matrix()/默认构造函数 coutlinerow; m=new int *line; for(int i=0;

13、iline;i+) mi=new introw; matrix(matrix & A)/拷贝构造函数 m=new int *A.line; for(int i=0;iA.line;i+) mi=new intA.row; line=A.line;row=A.row; matrix()/析构函数 cout调用了析构函数endl; for(int i=0;iline;i+) delete mi; delete m; main() matrix A1;/ 调用不带参数的构造函数 matrix A2=A1;/拷贝构造函数 matrix A3=A1; coutA1:; A1.init(); coutA2

14、:; A2.init(); A3.add(A1,A2); coutA1和A2的和是：endl; A3.output(); A3.subtract(A1,A2); coutA1和A2的差是：endl; A3.output(); int line ,row; coutlinerow; matrix* pA1=new matrix(line,row); matrix* pA2=new matrix(line,row); matrix* pA3=new matrix(line,row); coutinit(); coutinit(); pA3-add(*pA1,*pA2); coutA1和A2的和是：

15、output(); coutA1和A2的差是：subtract(*pA1,*pA2); pA3-output(); A1.matrix(); A2.matrix(); A3.matrix(); return 0;三1.cpp#include#define pi 3.1416using namespace std;class shapepublic: float area() return 1; shape()/构造函数 coutshape的构造函数被调用endl; shape()/析构函数 coutshape的析构函数被调用endl;system(pause); ;class rectangl

16、e: public shapeprivate: float length; float wideth; public: rectangle(float a,float b) length=a; wideth=b; coutrectangle带参数的构造函数endl; void set(float a,float b) length=a; wideth=b; float area() return length*wideth; rectangle() coutrectangle的析构函数endl; system(pause); ;class circle: public shapeprivate

17、: float r; public: circle(float m) r=m; coutcircle的构造函数endl; void set(float m) r=m; float area() return pi*r*r; circle() coutcircle的析构函数endl; system(pause); ;class square: public rectangleprivate: float q; public: square(float a):rectangle(a,a) q=a; coutsquare的构造函数endl; void set(float a) q=a; square

18、() coutsquare的析构函数endl; system(pause); ;int main()float a,b;cout1：计算长方形的面积：endl;coutab;rectangle p(a,b);cout长方形的面积是：p.area()endl;float c; cout2;计算正方形的面积：endl;coutc;square m(c);cout正方形的面积：m.area()endl;float d;cout3：计算圆的面积：endl;coutd; circle n(d);cout圆的面积：n.area()endl; return 0;三2.cpp#include#define p

19、i 3.1416using namespace std;class shapepublic: virtual float area()=0 shape()/构造函数 coutshape的构造函数被调用endl; shape()/析构函数 coutshape的析构函数被调用endl;system(pause); ;class rectangle: public shapeprivate: float length; float wideth; public: rectangle(float a,float b) length=a; wideth=b; coutrectangle带参数的构造函数e

20、ndl; void set(float a,float b) length=a; wideth=b; float area() return length*wideth; rectangle() coutrectangle的析构函数endl; system(pause); ;class circle: public shapeprivate: float r; public: circle(float m) r=m; coutcircle的构造函数endl; void set(float m) r=m; float area() return pi*r*r; circle() coutcirc

21、le的析构函数endl; system(pause); ;class square: public rectangleprivate: float q; public: square(float a):rectangle(a,a) q=a; coutsquare的构造函数endl; void set(float a) q=a; square() coutsquare的析构函数endl; system(pause); ;int main()float a,b;cout1：计算长方形的面积：endl;coutab;rectangle p(a,b);cout长方形的面积是：p.area()endl;

22、float c; cout2;计算正方形的面积：endl;coutc;square m(c);cout正方形的面积：m.area()endl;float d;cout3：计算圆的面积：endl;coutd; circle n(d);cout圆的面积：n.area()endl; return 0;三3.cpp#includeusing namespace std;class pointprivate: float x; float y; public: void set(float a,float b) x=a; y=b; float putX() return x; float putY()

23、return y; point() coutpoint的析构函数被调用endl; friend point operator+(point& c1)c1.x+;c1.y+;return c1;friend point operator+(point& c1,int) point temp=c1; +c1; return c1;friend point operator-(point& c1)c1.x-;c1.y-;return c1;friend point operator-(point& c1,int) point temp=c1; -c1; return c1;int main() fl

24、oat m,n; cout请输入坐标（x，y）mn; point p,b; p.set(m,n); cout1:p+的结果是 ; b=(p+); coutb.putX() b.putY()endl; cout2:+p的结果是endl; b=+p; coutb.putX() b.putY()endl; cout2:p-的结果是endl; b=(p-); coutb.putX() b.putY()endl; cout2:-p的结果是endl; b=-p; coutb.putX() b.putY()endl;四1.cpp#include #include#includeusing namespace

25、 std;int main() ofstream out; out.open(1.txt); int a=200; char b100=adadadad;int c=m;unsigned int d=7300;long e=1212121212;double f=121.121313;outsetw(15)b; outsetw(10)a;outsetw(10)d;outsetw(10)eendl;outsetprecision(12)f; setw(15); out十进制:setw(10)a; /默认以十进制形式输出a setw(15); out十六进制:hexsetw(10)a; /以十六进

26、制形式输出a out八进制:octsetw(10)a; /以八进制形式输出a out.close();return 0;四2.cpp#includeusing namespace std;int main()char name20;char temp20;coutname;ifstream read;ofstream out;out.open(测试.txt);read.open(name.txt); int n=1; while(read.getline(temp,20) outn:tempendl; n+; cout数据已被写入 测试.txtendl; out.close(); read.c

27、lose();四3.cpp#include#include#includeextern C/调用c的函数库#include#include using namespace std;/电话本结构体定义typedef struct TeleBookchar name20;long telenum;struct TeleBook *next;TeleBook,*LinkList;long num;char name20;/*电话本创建模块*/ LinkList CreatTelebook(LinkList L) LinkList s=L,p; cout请输入用户的姓名和号码,建立通讯录:（以#结束）

28、endl; coutname; coutnum; while(1) p=new TeleBook; p-telenum=num; strcpy(p-name,name); s-next=p; s=p; coutname; if(!(strcmp(name,#) break; coutnum; s-next=NULL; return L; /*在屏幕上输出电话本信息*/void printList(LinkList L) LinkList q=L-next; if(L=NULL|L-next=NULL)cout该通讯录为空endl; else cout*号码薄*endl; while(q!=NU

29、LL) cout姓名; ; cout.width(10); cout.fill(*); coutname; cout ; cout号码：; couttelenumnext; cout*name,name) if(n=0) cout你要查询的结果是：endl; cout姓名：name; coutsetw(10)号码：telenumnext;if(p=NULL&n=0) cout你要查找的用户不存在next!=NULL) m=m-next; int temp=0; LinkList q=L; coutname; coutnum; while(q!=NULL&temp=0) if(q-telenum

30、=num)temp=1; q=q-next; if(temp=0) p=new TeleBook; p-telenum=num; strcpy(p-name,name); m-next=p; m=p; if(temp=1) cout你所要录入的号码已被存入next=NULL; if(temp=0) cout添加信息成功！endl; return L;/*删除电话本联系人模块，提供按姓名和按号码删除，一次删除一条记录*/LinkList Delte(LinkList L)LinkList p=L,pre;coutn;if(p=NULL|p-next=NULL)cout该通讯录为空endl;ret

31、urn L; if(n=1) coutname; while(p!=NULL&(strcmp(p-name,name) pre=p; p=p-next; if(p=NULL&(strcmp(pre-name,name) cout电话本中不存在这个用户next=p-next; cout删除成功endl; if(n=2) coutnum; while(p-next!=NULL&p-telenum!=num) pre=p; p=p-next; if(p-next=NULL&p-telenum!=num) cout电话本中不存在这个用户next=p-next; cout删除成功next; ofstream mytext; mytext.open(mytext.txt); if(L=NULL|L-next=NULL)return; else while(q!=NULL)