CODEWITHSUNDEEP
c++fstreamifstream
piloto19hh
piloto19hh

Reputation: 1

Text file fails to open with ifstream

I'm trying to open a file in my program to import some information from it. The relevant part of the code is this one:

Airport::Airport(string& apt) {
    ifstream datasid;
    ifstream datastar;
    ICAO = apt;
    if (ICAO == "LEPA"){ //fill map with points and their departure
        datasid.open("LEPASID.txt");
        datastar.open("LEPASTAR.txt");
    }
    else if (ICAO == "LEAL"){ //fill map with points and their departure
        datasid.open("LEALSID.txt");
        datastar.open("LEALSTAR.txt");
    }
    else {
        cout << "El aeropuerto no se encuentra en la base de datos." << endl;
        correct = false;
    }

    if (datasid.fail() or datastar.fail()) cout << "Se ha producido un error al leer los datos del aeropuerto" << endl;

When I run the program, I get an error:

Se ha producido un error al leer los datos del aeropuerto

Meaning that datasid or datastar failed.

The files are in the same directory as the source files, and I checked that the names are correct.

Upvotes: 0

Views: 380

Answers (2)

piloto19hh
piloto19hh

Reputation: 1

I moved all the files, including the sources, executables etc. to a new directory. It's working now. I assume there was some kind of problem with the old directory.

Upvotes: 0

Anselmo GPP
Anselmo GPP

Reputation: 451

I have run that program in Visual Studio using main() and it works fine for me after fixing a few problems:

  • Adding the headers: string, fstream, iostream.
  • Making ICAO a std::string.
  • Adding a return type to the function and putting a "return whatever" at the end.
  • Instead of "or" I used ||.
  • Making "correct" bool type.
  • Adding all the "std::".

Here is my working code. This works for me. Check the differences with yours (I added the std::couts to check which if is activated). If it still doesn't works, probably the issue is with your variable ICAO (it is not LEAL or LEPA), with your Airport class, or maybe you don't have the .txt files in the correct directories.

#include <string>
#include <fstream>
#include <iostream>

int main() {
    std::string apt = "LEPA";
    std::ifstream datasid;
    std::ifstream datastar;
    std::string ICAO = apt; 
    if (ICAO == "LEPA") {
        datasid.open("LEPASID.txt");
        datastar.open("LEPASTAR.txt");
        std::cout << "LEPA OK";
    }
    else if (ICAO == "LEAL") { 
        datasid.open("LEALSID.txt");
        datastar.open("LEALSTAR.txt");
        std::cout << "LEAL OK";
    }
    else {
        std::cout << "El aeropuerto no se encuentra en la base de datos." << std::endl;
        bool correct = false;
    }

    if (datasid.fail() || datastar.fail()) 
         std::cout << "Se ha producido un error al leer los datos del aeropuerto" 
                   << std::endl;

Upvotes: 2

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