Compilare: user.cpp: In function ‘int main()’: user.cpp:26:24: warning: unused variable ‘actnode’ [-Wunused-variable] int k,p2=1,lastnode=0,actnode,i,j; ^ user.cpp:26:32: warning: unused variable ‘i’ [-Wunused-variable] int k,p2=1,lastnode=0,actnode,i,j; ^ user.cpp:26:34: warning: unused variable ‘j’ [-Wunused-variable] int k,p2=1,lastnode=0,actnode,i,j; ^