c++ - Initializing a Vector of Objects from a .txt file -

#include<iostream> #include<vector> #include<fstream> #include "stock.h" int main(){     double balance =0, tempprice=0;     string tempstr;      vector < stock > portfolio;     typedef vector<stock>::iterator stockit;      ifstream filein( "results.txt" );     for(stockit = portfolio.begin(); != portfolio.end(); i++)     {          while ( !filein.eof( ))         {             getline(filein,tempstr);             i->setsymbol(tempstr);              filein >> tempprice;             i->setprice(tempprice);              getline(filein,tempstr);             i->setdate(tempstr);         }         filein.close();     }     for(stockit = portfolio.begin(); != portfolio.end(); i++){         cout<<i->getsymbol() <<endl;         cout<<i->getprice() <<endl;         cout<<i->getdate() <<endl;     }     return 0; 

}

sample text file, results.txt:

goog    569.964 11/17/2010 msft    29.62   11/17/2010 yhoo    15.38   11/17/2010 aapl    199.92  11/17/2010 

now obviously, want program create vector of stock objects has appropriate set/get functionality object: stock(string, double, string).

once done, want print out each individual member of each object in vector.

one thing boggles mind fstream, how can decipher spaces , end of lines, , intelligently read strings/ints/doubles , place them appropriate data type? maybe can't...and have add entirely new functionality?

now seem i'm not creating new object each iteration of loop? think need along lines of:

portfolio.push_back(new stock(string, double, string));? i'm not entirely sure how point.

also, code should interchangeable std::list std::vector. program compiles without error, however, there 0 output.

first of all, iterating on vector makes sense when isn't empty. remove line:

for(stockit = portfolio.begin(); != portfolio.end(); i++) 

because otherwise contents of loop never executed.

second, have problems input reading: use getline first field, read values of 3 fields on line tempstr variable.

third, shouldn't use while(!filein.eof()) - eof function returns true after tried read past end of file. instead, use:

while (filein >> symbol >> price >> date) {     //here should create stock object , call push_back on vector. } 

this read 3 fields, separated spaces.