what's meaning?

[wizardblue]

struct Edge{
int w,v;
Edge(int v=-1,int w=-1) : v(v), w(w){ }//? what's meaning?
};

[insulator]

v(v), w(w)
======>v=v;w=w;

[wizardblue]

i means why here do thus?

[pcyy]

楼主：
you should say:what's the meaning or what's mean.

[Jinhao]

there is a mistake in your code, same names, w and v

struct Edge{
int w_,v_;

Edge(int v=-1,int w=-1) //this is a contructor
: v_(v), w_(w) //this is member initialization list, it provides a mechanism than you can direct-initialize the objects of class type.
{ }
};

[Jinhao]

sorry, my mistake. the data member v and parameter v are right here

[snow810211]

构造函数
struct Edge{
int w,v;
Edge(int v=-1,int w=-1) : v(v), w(w){ }
};

也可以写成:

struct Edge{
int w,v;
Edge(int v=-1,int w=-1)
{
v=v;
w=w;
}
};

[ck2205]

给成员变量赋值.

[Jinhao]

struct Edge{
int w,v;
Edge(int v=-1,int w=-1)
{
v=v; //oops
w=w; //oops
}
};

struct Edge{
int w,v;
Edge(int v=-1,int w=-1)
{
this->v=v; //oops
this->w=w; //oops
}
};