Compilare: user.cpp: In function ‘int main()’: user.cpp:14:11: warning: ‘prim’ may be used uninitialized in this function [-Wmaybe-uninitialized] p->vf = y; ^ user.cpp:24:27: note: ‘prim’ was declared here int N,M,i,x,y,B,K,j,last,prim,vf,nod; ^ user.cpp:15:15: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] p->next = a[x]; ^ user.cpp:24:22: note: ‘last’ was declared here int N,M,i,x,y,B,K,j,last,prim,vf,nod; ^