Compilare: user.cpp: In function ‘int main()’: user.cpp:26:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d" ,&n,&m); ^ user.cpp:27:53: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lld%lld%lld%lld%lld" ,&A,&B,&C,&D,&E); ^ user.cpp:29:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&v[i]); ^ user.cpp:17:30: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] next[last]=next[poz]; ^ user.cpp:9:10: note: ‘last’ was declared here int last; ^ user.cpp:17:30: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] next[last]=next[poz]; ^ user.cpp:9:10: note: ‘last’ was declared here int last; ^ user.cpp:17:30: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] next[last]=next[poz]; ^ user.cpp:9:10: note: ‘last’ was declared here int last; ^