newbie question reading in an array using a structure for the array type

[traviswhiskey]

so i'm trying to read in from a file but having lots of trouble so far all i get are segmentation faults or jibberish numbers when outputting and i just need a little bit of direction on how to solve this problem. i'm reading i don't have much experience with reading arrays in from a file and stuff. heres what i have.

struct date
{
      int day, month, year; 
};
 
struct student
{
      string firstName, lastName;
      int hours;
      double points;
      date dob;
};
 

those are my structs and my prime read is

students>>  listOfS[arraySize].lastName >> listOfS[arraySize].firstName >> listOfS[arraySize].hours >> listOfS[arraySize].points >> listOfS[arraySize].dob.day >> listOfS[arraySize].dob.month >> listOfS[arraySize].dob.year;
 
while(!students.eof())
    { 
                          arraySize++;
                          cout <<  listOfS[arraySize].lastName << listOfS[arraySize].firstName << listOfS[arraySize].hours << listOfS[arraySize].points << listOfS[arraySize].dob.day << listOfS[arraySize].dob.month << listOfS[arraySize].dob.year;
    }
 

array size is initialized to 100 and i have error checking to make sure the file opens and the dat file is

Jones Pete 30 78.0 1 11 1973
Brown Carl 64 198.4 6 7 1985
Smith Ann 37 118.4 9 2 1980
White Mary 54 143.1 3 17 1975
Black John 47 87.4 12 10 1981
Flyn Bee 58 145.0 8 15 1987
Sikes Bob 23 88.78 2 11 1983
 

thank you in advance

[oler1s]

You honestly should read the forum rules about using CODE tags. It's more than rude to dump mass amounts of unformatted code. We can't read it properly, and we won't be able to help you.

Maybe the problem is somewhere else. But I already see a problem with:

while(!students.eof())
{
    arraySize++;
 

eof() does not behave like you imagine it does. That is why you should always read the documentation before you use it. The documentation will state something like it returns true if the eof flag on a stream is set. I'm going to stop here, and see if you intuitively see the problem. If not, I'll explain further.

[traviswhiskey]

yeah i'm not understanding

[traviswhiskey]

so whats wrong with the eof()?

[traviswhiskey]

can anyone else help me out?

[weaknessforcats]

Jones Pete 30 78.0 1 11 1973

With data line this if you use the >> operator into a string all you get is Jones. The >> operator skips whitespace.

You can only use the >> operator when you know the format of the data and your data has unknown format. I say this because this data:

weaknessforcats 30 78.0 1 11 1973
 

looks the same but has fewer data elements.

You need to a) alter your input by inerting field separators so you know where your data elements are, or b) read the entire line in as a single string and then parse out the elements from the string.