编程题和读程序写结果复习题

编程题和读程序写结果复习题

一、读程序写结果

1、(数组、控制语句与指针)

#include

using namespace std;

void main ()

{

int a [6],*p,i;

p=&a[2];

for(i=0;i<6;i++)

a[i]=i;

for(i=0;i<4;i++,p++)

cout<<*p;

2、（构造函数重载）

#include

using namespace std;

class MyClass

{

public:

MyClass();

MyClass(int);

~MyClass();

void Display();

protected:

int number;

};

MyClass::MyClass()

{

number=0;

cout<<"Constructing normallyn";

}

MyClass::MyClass(int m)

{

number=m;

cout<<"Constructing with a number:"<

bdsfid="98" p="">

}

void MyClass::Display()

{

cout<<"Display

}

MyClass::~MyClass()

{

cout<<"Destructingn";

}

void main()

{

MyClass obj1;

MyClass obj2(20);

y( );

y( );

}

3、

#include(二维数组)

#include

using namespace std;

void main(){

int b[][5]={{11,12,13,14,15},

a number :"<

bdsfid="103" p="">

{21,22,23,24,25},

{31,32,33,34,35}};

int(*pb)[5];

pb=b;

for(int i=0;i<3;i++,pb++)

{

for(int j=0;j<5;j++)

cout<<*(*pb+j)<<”,”;

cout<

}

}

4、（数组作为函数参数）

#include

#include

using namespace std;

void fun(char s[],int k);

void main(void)

{ char a[]="abcde";

int n ;

n=strlen(a);

fun(a,n);

cout<

}

void fun(char s[],int k)

{ int x,y;

char c;

x=0;

for(y=k-1;x

{

c=s[y];s[y]=s[x];s[x]=c;

x++;

}

}

5、（继承关系中构造函数的调用次序）

#include

using namespace std;

class base

{

int n;

public:

base(int a)

{

cout<<"constructing base class"<

p="">

n=a;

cout<<"n="<

}

~base(){cout<<"destructing base classes"<<="">

class sub:public base

{

int m;

public:

sub(int a,int b):base(a)

{

cout<<"constructing sub class"<

p="">

m=b;

cout<<"m="<

p="">

}

bdsfid="190"

~sub(){cout<<"destructing sub class"<<="">

void main()

{

sub s(3,4);

}

6、（静态局部变量）

#include

using namespace std;

void test();

void main()

{

for(int i=0;i<4;i++)

test();

}

void test()

{

int i=0;

static int j=0;

i++; j++;

cout<

p="">

}

7、（静态数据成员）

#include

using namespace std;

class sample

{

int n;

static int sum;

public:

bdsfid="214"

sample(int x){n=x;}

void add(){sum+=n;}

void disp()

{

cout<<"n="<

p="">

}

};

int sample::sum=0;

void main()

{ sample a(2),b(3),c(4);

(); ();

(); ();

(); ();

();

();

}

8、（全局变量和局部变量）

#include

using namespace std;

int a=5;

void main() {

int a=10,b=20;

{ int a=0,b=0;

for(int i=1; i<=3; i++)

{ a+=i; b+=a; }

cout <

}

cout <<::a<<' '<

p="">

}

9、（常量、数组与指针）

#include

using namespace std;

const int m=10;

void main()

{ int a[m],av=0;

int *p=a;

for(int i=0;i<10;i++)

a[i]=2*i;

for(;p

av=av+*p;

av=av/m;

cout<<"av="<

p="">

}

10、（引用）

#include

using namespace std;

void f(int &a)

{ cout << "a = " << a << endl;

a = 5;

cout << "a = " << a << endl;} void main()

{

int x = 47;

f(x);

cout << "x = " << x << endl;

}

11、（虚函数）

#include

bdsfid="273"

using namespace std;

class Col

{ public:

Col() { }

~Col() { }

virtual void f()

{ cout<<"Col class f "<<="" p="" void="">

{cout<<"Col class g "<<="">

class Red: public Col

{ public:

~Red() { }

void f(){cout<<"Red class fn";}

void g(){cout<<"Red class gn";} };

void main()

{ Col c;

Red r;

Col *cp;

cp=&c;

cp->f();

cp->g();

cp=&r;

cp->f();

cp->g();

}

12、(引用)

#include

int a[]={1,2,3,4,5};

int &index(int);

void main(){

for(int i=1;i<5;i++)

index(0)+=index(i);

cout<

p="">

}

int &index(int i){

return a[i];

}

13、（拷贝构造函数）

#include

using namespace std;

class Test

{

public:

Test(int temp)

{

p1=temp;

cout<<"The constructor is called!"<

p="">

}

Test(Test&s){

cout<<"The

}

protected:

int p1;

};

Test f(Test f){

return f;

}

void main()

copy constructor is called!"<

bdsfid="346" p="">

bdsfid="326"

{

Test a(99);

Test b=a;

Test c=f(b);

}

二、编程题

1.递归与非递归实现阶乘

#include

int f(int n)

{

if(n==1) return 1;

else return n*f(n-1);

}

void main()

{

long sum=0;

for(int i=1;i<=5;i++)

sum+=f(i);

cout<<"1!+2!+...+5!="<

p="">

}

非递归

#include

int f(int n)

{

int m=1;

for(int j=1;j<=n;j++)

m=m*j;

return m;

}

bdsfid="375"

void main()

{

long sum=0;

for(int i=1;i<=5;i++)

sum+=f(i);

cout<<"1!+2!+...+5!="<

p="">

}

2.请编写一个基于对象的程序。数据成员包括length（长）、width（宽）、height （高）。要求用成员函数实现以下功能：

1)由键盘分别输入3个长方体的长、宽、高；

2)计算长方体的体积；

3)计算长方体的表面积；

#include

//using namespace std;

class Box{

int l;

int w,h;

int v;

int s;

Box (int ll,int ww,int hh){l=ll;w=ww;h=hh;}

int volume(){

v=l*w*h;

return v;

}

int area(){

s=2*(w*h+h*l+w*l);

return s;

}

void print(){

bdsfid="393"

cout<

cout<

}

};

void main(){

int m,n,k;

cin>>m>>n>>k;

Box t(m,n,k);

();

();

();

}

3. 编写一个类：point，包含三个坐标x，y，z。这个类包括：构造函数，拷贝构造函数，析构函数，print函数，重载运算符－。在主函数中，定义对象tp1，tp2，tp3＝tp2－tp1，并各个对象相应坐标。

#include

using namespace std;

class point

{

float x,y,z;

public:

point(){}

point(float i,float j,float k)

{

x=i;y=j;z=k;

}

point(point &h){

x=h.x;y=h.y;z=h.z;

};

~point(){cout<<"destructing is called"<

bdsfid="448" p="">

void

print(){cout<<"x="<

bdsfid="450" p="">

point operator-(point &p){

point temp;

temp.x=x-p.x;

temp.y=y-p.y;

temp.z=z-p.z;

return temp;}

};

void main()

{

point p1(1.0,2.0,3.0);

point p2(2.0,3.0,4.0);

point p3(p2);

point p4=p3-p1;

();

}

(向量) X=(x1,x2,x3) and Y=(y1,y2,y3), and the rule of

their +,-，*，++

is defined as the following:

X+Y=(x1+y1, x2+y2, x3+y3)

X-Y=(x1-y1, x2-y2, x3-y3)

X*Y=(x1*y1, x2*y2, x3*y3)

X++ (x1++,x2++,x3++)

Create the Vector class Vector, it include three data member,

the function member should include:

(1) constructor that initialize the data member.

(2) An overloaded operator + that can add two vectors.

(3) An overloaded operator - that can sub two vectors.

(4) An overloaded operator * that can multiply two vectors.

(5) a show function that can display the vector

And then make the operator++ function as a friend function

of Vector class. Write the main program, create two vector object,

one is (1,2,3) , the other is (4,5,6),then add them and multiply

them respectively.

#include

using namespace std;

class Vector{

int x,y,z;

public:

Vector(int xx=0,int yy=0,int zz=0):x(xx),y(yy),z(zz){

cout<<"The constructor is called!"<

p="">

}

Vector operator+(Vector &v){

Vector temp;

temp.x=x+v.x;

temp.y=y+v.y;

temp.z=z+v.z;

return temp;

}

Vector operator-(Vector &v){

Vector temp;

temp.x=x-v.x;

temp.y=y-v.y;

temp.z=z-v.z;

return temp;

}

Vector operator*(Vector &v){

Vector temp;

temp.x=x*v.x;

temp.y=y*v.y;

temp.z=z*v.z;

return temp;

}

void print(){

cout<

p="">

}

friend Vector operator++(Vector&v);

};

Vector operator++(Vector&v){

v.x++;

v.y++;

v.z++;

return v;

}

void main(){

Vector v1 (1,2,3),v2(4,5,6),v3;

v3=v1+v2;

();

v3=v1*v2;

();

cout<

}

5. #include

using namespace std;

class Shape

bdsfid="512"

{

public:

virtual double Area()=0;

};

class Triagle:public Shape

{

public:

Triagle(double h,double w){H=h,W=w;}

double Area()

{

return H*W*0.5;

}

private:

double H,W;

};

class Rectangle:public Shape

{

public:

Rectangle(double h,double w)

{

H=h;W=w;

}

double Area(){return H*W;}

private:

double H,W;

};

class Circle:public Shape

{

public:

Circle(double r){radius=r;}

double Area()

{

return radius*radius*3.1415;

}

private:

double radius;

};

void main(){

shape*v;

Triagle t(3.2,3.5);

v=&t;

v->area();

Rectangle r(3.2,3.5);

v=&r;

v->area();

Circle c(4.5);

v=&c;

v->area();

}

6.求100~200之间不能被3也不能被7整除的数，并依次输出

#include

using namespace std;

void main(){

for(int i=100;i<=200;i++){

if(i%3!=0&&i%7!=0)

cout<

}

}

7.编写函数分别求两个数的最大公约数和最小公倍数，并在主函数中分别调用这两个函数

#include

using namespace std;

int hcf(int x,int y){

while(x!=y){

if(x>y)

x=x-y;

else

y=y-x;

}

return y;

}

int icd(int x,int y){

return x*y/hcf(x,y);

}

void main(){

int a,b;

cin>>a>>b;

cout<<"最大公约数为:"<

p="" }<="" 最小公倍数为:"<