Question

I’m trying to read a file byte by byte and write it to another file. I have this code:

if((file_to_write = fopen(file_to_read, "ab+")) != NULL){

  for(i=0; i<int_file_size; i++){
    curr_char = fgetc(arch_file);

    fwrite(curr_char, 1, sizeof(curr_char), file_to_write);
  }
}

where int_file_size is the amount of bytes I want to read, arch_file is the file I’m reading from, and curr_char is a char pointer.

However this doesn’t work. I get Segmentation fault (core dumped) error on the first iteration in the loop. I’m pretty sure there is something wrong with my fwrite() statement. Any help would be appreciated.

Answer 1

You should pass the address of curr_char, not the curr_char itself:

fwrite(&curr_char, 1, sizeof(curr_char), file_to_write);
//     ^------ Here