Compilare: user.cpp: In function ‘int main()’: user.cpp:18:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%hd",&n); ^ user.cpp:22:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%hd",&x); ^ user.cpp:34:13: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] k+=x; ^