Compilare: user.cpp: In function ‘int main()’: user.cpp:8:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%i",&n); ^ user.cpp:10:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%i",&v[i]); ^ user.cpp:25:14: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=k-1;i>=0;i--) ^