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metamax
Asked: 2020-03-17 08:38:21 +0800 CST 2020-03-17 08:38:21 +0800 CST

Is it possible to load a list of words into an array from a text file?

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Hello, as the question says, what I want to know is if it is possible to load a list of words in an array the way I am doing it. If someone can help me please here is a snippet of the code:

    #include<iostream>
    #include<synchapi.h>
    #include<string.h>
    #include<stdio.h>
    using namespace std;
    int main()
    {
    FILE *cargar_verbos; 
    int c_v=0;// este lo utilizo como contador
    string c__v; // este lo utilizo para cargar la palabra
    cargar_verbos=fopen("verbos_ar.txt","r"); 
    // el siguiente while lo utilizo para saber cuantas palabras hay en el              
    //archivo pues en este punto no tenemos ni idea.
    while(!feof(cargar_verbos))
    {
        fscanf(cargar_verbos,"%s",&c__v);
        c_v++; // por eso uso este contador

    }
    string verbos_ar[c_v]; //declaro el arreglo tipo string y utilizo el 
    //contador para declarar la cantidad



    c_v=0; // paso el contador nuevamente a cero

    while(!feof(cargar_verbos)) // aqui es donde tengo el problema
    {

        fscanf(cargar_verbos,"%s",&verbos_ar[c_v]); // esta es mi duda

        c_v++;

    }
    fclose(cargar_verbos);
    }

As you can see in the part that loads the word in the array I put the counter as indicative and according to me it should store the word without problems but whenever I run the program and it reaches that part it gives me an error. If anyone can help me I would really appreciate it.

c++

1 Answers

  1. Best Answer

    First of all :

    You're programming in C++ (because of the headers you include, I guess) but your code is plain old C. Although C is compatible with C++, the latter solves very common problems of the former's practices, among other things.

    Back to the problem :

    Specifically, as some comments say, in the second while you ask again if the end of the file was not reached, which will always be true since the first loop did. Remember that each open file has an associated file descriptor and internal indexes that indicate which byte of the file you are in. The solution in this case is to use some line like:

    fseek(cargar_verbos, 0, SEEK_SET)

    either

    rewind(cargar_verbos)

    Side Comment : Try to make variable names good descriptions of the information they contain. cargar_verbosdoesn't make sense, since that object doesn't load verbs, but contains them. A more suitable name would be, for example, archivo_verbosor lista_verbos.

    Actual solution: The correct solution, since you are in C++, is to use C++ classes stdliband syntax to solve it.

    #include <iostream>    // Para imprimir por stdout
#include <fstream>     // Leer de archivo
#include <vector>      // Almacenar datos en un vector
#include <string>      // Para tener objetos string, o cadena de caracteres.

using namespace std; // Esto no es recomendable hacerlo siempre por el naming colision.

int main()
{
    auto success = EXIT_FAILURE;
    vector<string> vectorVerbos; // En C++ se usa convención camelCase

    ifstream archivoVerbos("verbos_ar.txt"); // Abrimos archivo
    if (archivoVerbos)  // Vemos si lo abrimos correctamente
    {
        string verbo;
        while (getline(archivoVerbos, verbo))
        {
            vectorVerbos.emplace_back(verbo);
        }
        archivoVerbos.close();
        success = EXIT_SUCCESS;
    }

    // Ahora vectorVerbos contiene todos los verbos.
    // Hacer lo necesario....

    return success;   
}
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