Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:28:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘void dfs2(int, int)’: user.cpp:42:9: warning: unused variable ‘i’ [-Wunused-variable] int i; lista *p; ^ user.cpp: In function ‘int main()’: user.cpp:54:28: warning: unused variable ‘val’ [-Wunused-variable] int n,m,i,x,y,j,t=1,ok,val; ^ user.cpp:55:12: warning: unused variable ‘p’ [-Wunused-variable] lista *p,*q; ^ user.cpp:55:15: warning: unused variable ‘q’ [-Wunused-variable] lista *p,*q; ^