Hello
I'm working on my MS thesis and I want to use some value from a variable in
channel.cc , this variable return the Pr and Pt , power of receiver and
power of transmitter respectively. so i defined a variable ("getvalue_")
and a function (getvalue) in channel.h (channel header file) in this way:
[channel.h :]
class WirelessChannel : public Channel {
....
public:
...
WirelessChannel(void);
double getvalue_;
inline double getvalue() {return getvalue_;}
....
}
and also in channel.cc ,call the variable and equal it to the function that
desire to read :
[channel.cc]
void
WirelessChannel::calcHighestAntennaZ(Phy *tifp)
{
...
getvalue_ = wifp->getPt();
printf("P_t____ = %f\n",getvalue_);
...
}
it's noticable that getvalue_ is printed in channel.cc
but when call the function getvalue in AODV.CC
[AODV.cc]
{
....
void
AODV::recvRequest(Packet *p) {
...
WirelessChannel *tifp;
double x=tifp->gethighestAntennaZ();
printf("x____ = %f\n",x);
double y=tifp->getvalue();
printf("y____ = %f\n",y);
...
}
the value of x is printed in terminal but
but for the getvalue function segmentation fault occur.
what should i do to read a variable from other cc files? which part of
above i was wrong that segmentation fault happened?
Thanks in advance for your help.
______________________________________________________
Alireza Shamsoshoara, M.Sc.
Faculty of Electrical and Computer Engineering (ECE)
K.N.Toosi University of Technology
Tehran, IRAN.
