how to get the last line 10 char in a text file if the last line is null?

[roberttonafelix]

Dear all,

I can able to get the last line ten chars but i cant get if the last line is null.

here is my code

#include <cstdlib>
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
using namespace std;
int main(int argc, char *argv[])
{
    ifstream SVfile("D:\\bys\\LOG.txt");
    string sLine;
    string SVcode;
    getline(SVfile, sLine);
    SVcode = sLine;
    char temp[1000000];
    ifstream file;
    stringstream ss;
    string value;
    string SVfilename = SVcode;
    string SVpath = "D:\\bys\\"+SVfilename;
    const char * f = SVpath.c_str();
    file.open(f);
    while(!file.eof())
    {
     file.getline(temp,1000000);                
    }
     ss << temp;
     ss >> value;
     string lastchar = value.substr(0,10);
//     cout << lastchar << endl;
     ofstream myfile;
     string filename = lastchar+".txt";
     string filepath = "D:\\bys\\"+filename;
     const char * c = filepath.c_str();
     myfile.open (c);
     myfile << lastchar;
     cout<<lastchar<<endl;
     myfile.close();
     system("PAUSE");
     return EXIT_SUCCESS;
     
}

here with i have enclosed my file where i am pick my last ten chars kindly guide me...

thanks and regards,

Robert.J

[weaknessforcats]

If the line is null, then there are no characters to get. Which raises the question, if the last line has 9 characters or less do you want to ignore this condition also?

You may just need to do a value.size() and only work with lines where size is 10 or more.