Compilare: user.cpp: In function ‘void read()’: user.cpp:116:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^ user.cpp:121:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &x, &y); ^ user.cpp: In function ‘void euler(int)’: user.cpp:94:19: warning: ‘w’ may be used uninitialized in this function [-Wmaybe-uninitialized] out << ' ' << w << '\n';//fprintf(out, " %d\n", w); ^