Solved

Need help fast! char MG[3]; MG="400?due" ?

Posted on 1998-01-06
4
178 Views
Last Modified: 2010-04-10
This is the function I am having problem with:

void Les_Inn_Verdier()
{
      char InnBuffer[100];
      unsigned int count=100;
      int fhInn;
        fhInn = _open( "f:\\diplom\\flysim.dat", _O_RDWR |           _O_CREAT, _S_IREAD | _S_IWRITE);
      _read( fhInn, InnBuffer, count );
      _close( fhInn );
      char MG[3];
      char MA[5],MP[4];
      MG[0]=InnBuffer[0];
      MG[1]=InnBuffer[1];
      MG[2]=InnBuffer[2];
      Max_Groundspeed = atof(MG);
      MA[0]=InnBuffer[3];
      MA[1]=InnBuffer[4];
      MA[2]=InnBuffer[5];
      MA[3]=InnBuffer[6];
      MA[4]=InnBuffer[7];
      Max_Altitude = atof(MA);
      MP[0]=InnBuffer[8];
      MP[1]=InnBuffer[9];
      MP[2]=InnBuffer[10];
      MP[3]=InnBuffer[11];
      Max_Pitch = atof(MP);
}

With my buffer, called InnBuffer like this:
InnBuffer = "400;30000;45.0;"
I get this result:
MG = "400?due"
MA = "30000ye"
MP = "45.00210002,d"
I had expectet MG = "400", MA="30000" and MP = "45.0", but that was clearly wishful thinking. I have no idea what can be wrong and really hope someone can help me with this as fast as possible.

0
Comment
Question by:Krafer
  • 3
4 Comments
 
LVL 22

Accepted Solution

by:
nietod earned 200 total points
ID: 1177654
answer comming
0
 
LVL 22

Expert Comment

by:nietod
ID: 1177655
The problem is that your strings are not NUL termianted.  C (and C++) uses a NUL character (a byte with the value 0) to terminate a string, that is, to indicate the end of the string.  You need to declare your strings with enough space to have the terminator and you need to set the terminator.  You need to do something like.

char MG[4]; // room for 3 characters and a terminator.
MG[0]=InnBuffer[0];
MG[1]=InnBuffer[1];
MG[2]=InnBuffer[2];
MG[3]=0; // terminate.
0
 
LVL 22

Expert Comment

by:nietod
ID: 1177656
Same sort of logic applies to the other strings (character arrays).

Hope that is fast enough.
0
 

Author Comment

by:Krafer
ID: 1177657
That was impressingly fast! And of course the answer was correct. I was just about to start working my way around the problem, and that would probably have taken hours.

The chances that I get this diploma finished in time has increased.

Thanks!

Norwegian student

0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Container Orchestration platforms empower organizations to scale their apps at an exceptional rate. This is the reason numerous innovation-driven companies are moving apps to an appropriated datacenter wide platform that empowers them to scale at a …
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
The goal of the video will be to teach the user the difference and consequence of passing data by value vs passing data by reference in C++. An example of passing data by value as well as an example of passing data by reference will be be given. Bot…
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question