我郁闷，一直复制粘贴复制粘贴，好类啊。给个好评吧。
//#include <stdio.h>
//
//int a[3][4]={
// {1,3,5,7},
// {9,11,13,15},
// {17,19,21,23}
//};
//
//int main()
//{
// int i,(*b)[4];
// b=a+1; /* b指向二维数组的第1行, 此时*b[0]是a[1][0] */
// printf(*(b[0]+2)=%d\n,*(b[0]+2));
// for(i=1;i<=4;b=b+2,i++)//这个循环的b=b+2使到b越界了，所指内容根本不是数组a的内容。
// printf(%d\t,*b[0]);
// printf(\n);
// for(i=0; i<3; i++)
// {
// b=a+i; /* 修改b的指向,每次跳过二维数组的一行 */
// printf(%d\t,*(b[i]+1));
// }
// printf (\n);
//}
//
//#include <iostream>
//using namespace std;
//
//
//class Triangle
//{
//public:
// Triangle();
// Triangle(int height, int width);
// Triangle(const Triangle& tri);
// bool operator>(const Triangle& tri);
//private:
// double _height;
// double _width;
//};
//
//
//Triangle::Triangle()
//:_height(0.0)
//,_width(0.0)
//{
// //Empty
//}
//
//
//Triangle::Triangle(int height, int width)
//:_height(height)
//,_width(width)
//{
// //Empty
//}
//
//
//Triangle::Triangle(const Triangle &tri)
//:_height(tri._height)
//,_width(tri._width)
//{
// //Empty
//}
//
//
//
//bool Triangle::operator >(const Triangle &tri)
//{
// return (_height * _width / 2) > (tri._height * tri._width / 2);
//}
//
//
//
//int main()
//{
// Triangle t1(4,6),t2(3,6);
// cout << Triangle1-->4,6 || Triangle2-->3,6 << endl;
// if (t1 > t2)
// {
// cout << Triangle1>Triangle2 << endl;
// }
// else
// {
// cout << Triangle1<=Triangle2 << endl;
// }
// return 0;
//}
//设有以下一个抽象类：（参考书上例题8.18）
//
//class shape
//
//{ public: virtual double area( )=0; //求图形面积
//
//virtual void printshapename( )=0; //输出图形的名称
//
//};
//
//由该类派生的类分别求：圆形、三角形、矩形、梯形和正方形的面积，
//
//输出各图形的面积及图形的名称。
//
//以上程序的测试数据自定。
#include <iostream>
using namespace std;
class shape
{
//题目要求
public:
virtual double area() = 0;
virtual void printshapename() = 0;
};
//declare circle class
class circle : public shape
{
public:
circle();
circle(int r);
circle(const circle& cir);
public:
virtual double area();
virtual void printshapename();
private:
double _r;
};
//declare triangle class
class triangle : public shape
{
public:
triangle();
triangle(int height, int width);
triangle(const triangle& tri);
public:
virtual double area();
virtual void printshapename();
private:
double _height;
double _width;
};
//declare rectangle
class rectangle : public shape
{
public:
rectangle();
rectangle(int length, int width);
rectangle(const rectangle& tri);
public:
virtual double area();
virtual void printshapename();
private:
double _length;
double _width;
};
//declare square
class square : public shape
{
public:
square();
square(int length);
square(const square& cir);
public:
virtual double area();
virtual void printshapename();
private:
double _length;
};
//class circle
circle::circle()
:_r(0.0)
{
//Empty
}
circle::circle(int r)
:_r(r)
{
//Empty
}
circle::circle(const circle& cir)
:_r(cir._r)
{
//Empty
}
double circle::area()
{
return _r * 3.14159;
}
void circle::printshapename()
{
cout << This is a circle << endl;
}
//class triangle
triangle::triangle()
:_height(0.0)
,_width(0.0)
{
//Empty
}
triangle::triangle(int height, int width)
:_height(height)
,_width(width)
{
//Empty
}
triangle::triangle(const triangle& tri)
:_height(tri._height)
,_width(tri._width)
{
//Empty
}
double triangle::area()
{
return _height * _width / 2;
}
void triangle::printshapename()
{
cout << This is a triangle << endl;
}
//class rectangle
rectangle::rectangle()
:_length(0.0)
,_width(0.0)
{
//Empty
}
rectangle::rectangle(int length, int width)
:_length(length)
,_width(width)
{
//Empty
}
rectangle::rectangle(const rectangle& tri)
:_length(tri._length)
,_width(tri._width)
{
//Empty
}
double rectangle::area()
{
return _length * _width;
}
void rectangle::printshapename()
{
cout << This is a rectangle << endl;
}
class trapezoidal : public shape
{
public:
trapezoidal();
trapezoidal(int upperLen, int lowerLen, int height);
trapezoidal(const trapezoidal& tri);
public:
virtual double area();
virtual void printshapename();
private:
double _upperLen;
double _lowerLen;
double _height;
};
trapezoidal::trapezoidal()
:_upperLen(0.0)
,_lowerLen(0.0)
,_height(0.0)
{
//Empty
}
trapezoidal::trapezoidal(int upperLen,int lowerLen, int height)
:_upperLen(upperLen)
,_lowerLen(lowerLen)
,_height(height)
{
//Empty
}
trapezoidal::trapezoidal(const trapezoidal& tri)
:_upperLen(tri._upperLen)
,_lowerLen(tri._lowerLen)
,_height(tri._height)
{
//Empty
}
double trapezoidal::area()
{
return (_upperLen + _lowerLen) * _height / 2;
}
void trapezoidal::printshapename()
{
cout << This is a trapezoidal << endl;
}
//class square
square::square()
:_length(0.0)
{
//Empty
}
square::square(int length)
:_length(length)
{
//Empty
}
square::square(const square& cir)
:_length(cir._length)
{
//Empty
}
double square::area()
{
return _length * _length;
}
void square::printshapename()
{
cout << This is a square << endl;
}
int main()
{
shape *pShape[5]={new circle(5), new triangle(4,6), new rectangle(3,7), new trapezoidal(3,7,5), new square(7)};
for (int i=0;i<5;++i)
{
pShape[i]->printshapename();
cout<<The Area is:<<pShape[i]->area()<<endl<<endl;
}
}
转载请注明：多米培训网 » C++课程设计 高分悬赏