Learn library SD card question

DavidZemon · 2015-10-19 03:08

void run_test() {
    sd_mount(0, 1, 2, 3);

    FILE *reader = fopen("fat_test.txt", "r");
    FILE *writer = fopen("new2.txt", "w");

    while (!feof(reader))
        fputc((char) fgetc(reader), writer);

    fclose(reader);
    fclose(writer);
}

The above code should copy a file to a new file.... pretty simple. Unfortunately, when I check the resulting file from my computer, there seems to be an extra byte at the end - 0xff if I understand what gedit is showing correctly. Am I doing anything incorrectly?

DavidZemon · 2015-10-19 03:10

Sorry, dumb question. I should have googled that.

http://www.cplusplus.com/reference/cstdio/feof/

Looks like my loop should be

char c;
while (EOF != (c = (char) fgetc(reader)))
  fputc(c, writer);

Learn library SD card question

Comments