构造函数与析构函数
#include "iostream"
using namespace std;
class Line
{
public:
void setLength(int len);
int getLength();
Line();
~Line();
private:
int length;
} ;
Line :: Line()
{
cout << "创建了一个对象" << endl;
}
Line :: ~Line()
{
cout << "删除了一个对象" << endl;
}
void Line :: setLength(int len) //注意：前面需要类型
{
length = len;
}
int Line :: getLength()
{
return length;
}
int main(void)
{
Line line;
line.setLength(7);
cout << "length is " << line.getLength() << endl;
}