Compilare: user.cpp: In function ‘int main()’: user.cpp:13:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&t); ^ user.cpp:52:30: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(k=right[val];k<j;k++){ ^