vs2012中定义转换构造函数

[妖妖成空]

#include <iostream>（为什么不能用#include <iostream.h>呢）
using namespace std;
class cpoint
{
public:
cpoint(double a,double b){x=a;y=b;}
cpoint(const cpoint&);
cpoint(double r)(x=r,y=0);（这一句一直提示此声明没有存储类或类型说明符是怎么回事）
~cpoint();
void setX(double);
void setY(double);
double getX()const;
double getY()const;
cpoint operator +(cpoint &);
cpoint operator -(cpoint &);
friend istream& operator>>(istream &,cpoint &);
friend ostream& operator<<(ostream &,cpoint &);
double x;
double y;
};

[妖妖成空]

编译环境是vs2012，cpoint(double r)(x=r,y=0);最后多大了个分号

[fhw217]

cpoint(double r){ x=r,y=0}; // 改为大括号