按照lz要求的代码,已在VC6编译通过:enjoy!
#include <iostream>
using namespace std;
#define PI 3.1415926
class Circle
{
public:
Circle(double a)
{
r = a;
};
private:
double r;
public:
double Area()
{
return PI * r * r;
}
};
void main()
{
Circle c1(4.2);
Circle c2(8.6);
cout << "small circle area: " << c1.Area() << endl;
cout << "big circle area: " << c2.Area() << endl;
}
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