Compilare: user.cpp: In function ‘char getChar()’: user.cpp:16:52: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(pos == BUF) pos = 0, fread(buf, 1, BUF, fin); ^ user.cpp: In function ‘int main()’: user.cpp:117:13: warning: ‘f3’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(son != f3 && (d[son][0] || d[son][1])) ^ user.cpp:115:13: warning: ‘f2’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(son != f2 && (d[son][0] || d[son][2])) ^ user.cpp:113:13: warning: ‘f1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(son != f1 && (d[son][1] || d[son][2])) ^