Compilare: user.cpp: In function ‘int main()’: user.cpp:37:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fopen("maxd.in", "r"), "%d%d", &a, &b); ^ user.cpp:49:44: warning: ‘ap’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << num << " " << maxdiv << " " << ap << '\n'; ^ user.cpp:49:13: warning: ‘num’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << num << " " << maxdiv << " " << ap << '\n'; ^