#include <iostream>
using namespace std;
class Circle
{
double r;
public:
void Show()
{
cout<<"面積="<<3.14*r*r<<endl;
}
computer()
{
r=10;
}
computer(double a)
{
r=a;
}
};
int main()
{
double r1;
cin>>r1;
Circle a,b(r1);
a.Show();
b.Show();
return 0;
}
uj5u.com熱心網友回復：
供參考：#include <iostream>
using namespace std;
class Circle
{
private:
double r;
public:
void Show()
{
cout<<"面積="<<3.14*r*r<<endl;
}
Circle()//computer()//類建構式名和類名是一樣的
{
r=10;
}
Circle(double a)//computer(double a)
{
r=a;
}
};
int main()
{
double r1;
cin>>r1;
Circle a,b(r1);
a.Show();
b.Show();
return 0;
}
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標籤：C語言
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