Compilare: user.cpp: In function ‘int main()’: user.cpp:31:16: warning: unused variable ‘j’ [-Wunused-variable] long u,v,i,j,k,rr=0,vr=1; nod* a,*b; float minn,total=0; ^ user.cpp:31:18: warning: unused variable ‘k’ [-Wunused-variable] long u,v,i,j,k,rr=0,vr=1; nod* a,*b; float minn,total=0; ^ user.cpp:31:39: warning: unused variable ‘b’ [-Wunused-variable] long u,v,i,j,k,rr=0,vr=1; nod* a,*b; float minn,total=0; ^ user.cpp:50:21: warning: ‘u’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol[1][rr]=u; ^