Problem reading a file in the same folder with fscanf

Question

I've been trying to read a data file with the following lines of code, but it doesn't ever start to read any and I don't know what's the problem:

#include <stdio.h>
#include <stdlib.h>
main()
{
    FILE * entrada, * salida;
    double *x, *y;
    double *z;
    int i=0,j=0,n=0;

    entrada=fopen("salidaIntegral.txt", "r");
    salida=fopen("Integral.txt", "w");

    fscanf(entrada,"%lf %lf", &x[i], &y[i]);
    printf("%lf %lf\n", x[i], y[i]);
    i++;
    while(feof(entrada)!=0)
    {
        fscanf(entrada, "%lf %lf", &x[i], &y[i]);
        printf("%lf %lf\n", x[i], y[i]);
        i++;
    }

The .txt file is in the same folder as the .c file.

the .txt should be where the executable is or you should specify the path to the text file from wherever the executable lives — Joe, Dec 30 '20 at 19:27
`double *x, *y;` are not pointing to any valid memory. But before then, you must check that the files really did open. — Weather Vane, Dec 30 '20 at 19:27
A [useful link](https://stackoverflow.com/q/5431941/1707353). — Jeff Holt, Dec 30 '20 at 19:35

score 0 · Answer 1 · answered Dec 30 '20 at 19:32

0

It was a Weather Vane said, the double *x, *y were not pointing at anything, now it's solved

answered Dec 30 '20 at 19:32

Pablo Vizcaino

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3

Problem reading a file in the same folder with fscanf

1 Answers1