Compilare: user.cpp: In function ‘int main()’: user.cpp:65:23: warning: operation on ‘m’ may be undefined [-Wsequence-point] h[++m] = m; ^ user.cpp:54:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%d", &n); ^ user.cpp:56:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%lld%lld", &v[i].t, &v[i].p); ^