substr problems

I am having problems splitting 1 string into sub strings.
the section of code is as follows


getline ( file_1, line );
index = line.find(",",1);
time = line.substr(0,index);
prob = line.substr(index,4); //works when rem'd

line, time and prob are strings
index is size_t

The file i am ready has the data in the following format

10,0.00,0,0,,,,,

When the program runs I get a abnormal program termination. with the prob line removed the prog runs fine with no errors.

I have tried casting index to int before the prob line and changed the substr format to line.substr(index); but nothing works

Can anyone point out where I am going wrong

Try printing line to see what it contains.

line contains what it should, 10,0.00,0,0,,,,

line contains what it should, 10,0.00,0,0,,,,

hmm... this seems to work for me, so I cannot really duplicate your problem:

Code:

#include <string>
#include <iostream>

int main()
{
    std::string line("10,0.00,0,0,,,,");
    std::string::size_type index = line.find(",",1);
    std::string time = line.substr(0,index);
    std::string prob = line.substr(index,4);

    std::cout << time << "\n" << prob << "\n";
}

Of course, you have a slight off by one mistake in that prob should be line.substr(index + 1, 4), but I certainly do not get an "abnormal program termination".

thanks - i got it sorted now
the prog failed due to reading past the end of a file, but why rem'ing that line allowed it work i don't know.

i'll try leaving things for an hour before posting problems in future.