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发表于 2009-11-3 03:23:59
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显示全部楼层
IP:江苏扬州
#include <iostream>
using namespace std;
class Rectangle
{
double x1,y1,x2,y2;
public:
Rectangle(double x_1,double y_1,double x_2,double y_2);
double area();
~Rectangle();
};
Rectangle::Rectangle(double x_1,double y_1,double x_2,double y_2)
{
x1 = x_1;
y1 = y_1;
x2 = x_2;
y2 = y_2;
}
Rectangle::~Rectangle()
{
}
double Rectangle::area()
{
double d,x,y;
x = x1 - x2;
y = y1 - y2;
d = x * y;
return (d > 0)?d : -d;
}
int main()
{
Rectangle r(-1,-1,1,2);
cout<<r.area()<<endl;
return 0;
} |
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