#include <stdio.h>

void main()
{
  char array[256];
  FILE* read_f = fopen("./sample.txt", "r");
  FILE* write_f = stdout;

  int b = 0;

  do {
    b = fread(array, 1, 255, read_f);
    fwrite(array, 1, b, write_f);
  } while(!feof(read_f));

  // maybe need fflush(write_f);
  fclose(read_f);
}