warning C4183: ‘Cricle‘: member function definition looks like a ctor, but name does not match enclo

报错：warning C4183: 'Cricle': member function definition looks like a ctor, but name does not match enclosing class

原代码

#include
#include
#define PI acos(-1)
using namespace std;
class Circle
{
private:
	double r;
public:
	Circle ()
	{
		r=3;
	}//提示warning在这一行
	void s()
	{
	cout< 
也能运行出来结果
 
错误原因：构造函数类名打错了！！
 
所以错误的结果用的r应该是默认的初始化值