CODEWITHSUNDEEP
carrays
HaZe
HaZe

Reputation: 45

Read a file char by char and store data to a bidimentional array C

I have a file called map.txt, that looks like :

xxxxxxxxxxxxxxxxxx
x  Ox xx         x
x  xx xx xxxxxx  x
xx            x  x
x xxxx  x  x  x  x
x       x     x  x
x  x    x  x  x  x
x  x             x
x  x    x  x  x  x
x                x
xxxxxxxxxxxxxxxxxx

It represents a maze. I have to read this file char by char and store it in a bidimensional array char data [][] but i'm having problems to use fgetc. here is my code:

int readMapFromFile(char *filename) {
    FILE *file = fopen(filename, "r");
    char element;
    printf("reading map from file %s...\n", filename);
    int c;

    if(file == NULL)
        return 1;

    int j =0;
    int i =0;

    while((c = fgetc(file))!= EOF) {
        element = (char) c;
        if(element == '\n') {
            j = 0;
            i++;
            continue;
        } else if(element == 'O') {
            player.exitX = j;
            player.exitZ = i;
        }
        data[i][j] = element;
        j++;
    }

    fclose(file);
    return 0;
}

It seems to skip the whitespaces and i have no idea how to make it work. As request i added how i display the data's content:

int i;
int j;
for (i =0 ; i < map.x ; ++i);
{
    for(j = 0 ; j < map.z ; ++j) {
        printf("%s \n", &data[i][j]);
    }
}

Expected output :

xxxxxxxxxxxxxxxxxx
x  Ox xx         x
x  xx xx xxxxxx  x
xx            x  x
x xxxx  x  x  x  x
x       x     x  x
x  x    x  x  x  x
x  x             x
x  x    x  x  x  x
x                x
xxxxxxxxxxxxxxxxxx

My output :

xxxxxxxxxxxxxxxxxxxOxxxxxxxxxxxxxxxxxxxxxxx

As you can see not the entire maze is saved.

Upvotes: 1

Views: 101

Answers (1)

Jabberwocky
Jabberwocky

Reputation: 50775

It's not about skipping whitespace. You just never increment j.

The code in the if(element == '\n') statement should be like this:

if(element == '\n'){
    j++;
    i = 0;
    continue;
}

If you had named your variables x and y instead of i and j, you probably would have found out by yourself.

And your map display function is totally wrong, it should be:

  int i;
  int j;

  for (i = 0 ; i < map.x ; ++i) {
    for(j = 0 ; j < map.y ; ++j) {
      printf("%c", data[i][j]);
    }
    printf ("\n");
  }

Upvotes: 1

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