Compilare: user.cpp: In function ‘char getChar()’: user.cpp:15:42: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] pos = 0, fread(buf, 1, buff, fin); ^ user.cpp: In function ‘int main()’: user.cpp:62:12: warning: ‘start’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout, "%d", answer[ start ]); ^