Initialization of pointer to a vector

[vegaonline]

It may be silly. However, I am now at loss and can't think. So I request handle to move. I have a class like-

class hodo {
public :
 int sensorDet;
trigger Trigger;
:::
}

Now I have a header called base.h contains

typedef std::vector<unsigned int> Channel;
:::
class trigger{
Channel* sensorVal=0;
}:::

Now I declare

hodo hd1;
unsigned int mydata = 56;
hd1.Trigger.sensorVal->push_back[mydata];

I am getting an error stating "Program received signal SIGSEGV, Segmentation fault.
0x000000000041a d26 in std::vector<uns igned int, std::allocator< unsigned int> >::emplace_back <int&> (this=0x0) at /usr/include/c++/4.8/bits/vector.tcc:94
94 if (this->_M_impl._M_fin ish != this->_M_impl._M_end _of_storage)... "

Please let me know how can I initialize sensorVal?
Thanks and Regards

[weaknessforcats]

I don't see where you created the vector.

I suggest you create your vector as a singleton. That would guarantee only one vector and would provide access to all your classes through a known access point.

You might read: https://bytes.com/topic/c/insights/6...erns-singleton