c++ - vector in function - how to do return

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I've got a function that should read
from file line by line, the reading stops when a line does not begin with '>' or ' '.
It should store the lines in vector and return it.
This is code: />

 #include
            
 #include 
 #include
            
 #include 
 #include
            

 #include 


            using namespace std;

 string getseq(char * db_file) // gets
            sequences from file
 {
 string seqdb;

            vector seqs;
 ifstream ifs(db_file);
 string
            line;


 //vector
            seqs[size/3];

 while(ifs.good())
 {

            getline(ifs, seqdb);
 if (seqdb[0] != '>' & seqdb[0]!=' ')

            {
 seqs.push_back(seqdb);
 }


            }

 ifs.close();
 //return seqs;


            //return seqs;
 }

 int main(int argc, char *
            argv[1])
 {

 cout << "Sequences: \n" <<
            getseq(argv[1]) << endl;
 return 0;

            }

Compiler (g++)
returns:

            fasta_parser.cpp: In function ‘std::string getseq(char*)’:

            fasta_parser.cpp:32: error: conversion from ‘std::vector            `std::char_traits, std::allocator >,
            std::allocator,
            std::allocator > > >’ to non-scalar type ‘std::string’
            requested`

Anyone
has any idea?

Edit:
As Skurmendel ask,
I am adding whole code because of memory security violation after

executing compiled code:

#include
            
#include 

#include
            
#include 
#include
            
#include 

using namespace
            std;

vector getseq(char * db_file) // pobiera
            sekwencje z pliku
 {
 string seqdb;


            vector seqs;
 ifstream ifs(db_file);
 string
            line;

 //vector seqs[size/3];


            while(ifs.good())
 {
 getline(ifs, seqdb);
 if (seqdb[0]
            != '>' & seqdb[0]!=' ')

 {

            seqs.push_back(seqdb);
 }
 }


            ifs.close();
 return seqs;
 }

int main(int
            argc, char * argv[1])

{
 vector seqs; //
            Holds our strings.
 getseq(argv[1]); // We don't return
            anything.

 // This is just a matter of taste, we create an alias
            for the vector iterator type.
 typedef
            vector::iterator string_iter;

 // Print
            prelude.
 cout << "Sekwencje: \n";


 //
            Loop till we hit the end of the vector.
 for (string_iter i = seqs.begin(); i
            != seqs.end(); i++)
 {
 cout << *i << " "; // Do
            processing, add endlines, commas here etc.
 }

 cout
            << endl;
}

Answer

If I understood you, your getseq()
should return a vector of strings. Therefore you should
change

string getseq(char *
            db_file)

to

vector
            getseq(char *
            db_file)

And
if you want to print it on main() you should do it in a
loop.

int main() {

            vector str_vec = getseq(argv[1]);

            for(vector::iterator it = str_vec.begin(); it != str_vec.end(); it++)
            {
 cout << *it << endl;

            }
}