Compilare: user.cpp: In function ‘int main()’: user.cpp:87:19: warning: statement has no effect [-Wunused-value] v[0] - MAXLUNG+1; ^ user.cpp:84:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:90:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^