Compilare: user.cpp: In function ‘int main()’: user.cpp:24:32: warning: variable ‘vf_before’ set but not used [-Wunused-but-set-variable] int N,M,i,t,x,y,vf=0,nrviz,vf_before,nod,sol=999,num,x1,x2,nd; ^ user.cpp:24:58: warning: unused variable ‘x1’ [-Wunused-variable] int N,M,i,t,x,y,vf=0,nrviz,vf_before,nod,sol=999,num,x1,x2,nd; ^ user.cpp:24:61: warning: unused variable ‘x2’ [-Wunused-variable] int N,M,i,t,x,y,vf=0,nrviz,vf_before,nod,sol=999,num,x1,x2,nd; ^ user.cpp:24:64: warning: variable ‘nd’ set but not used [-Wunused-but-set-variable] int N,M,i,t,x,y,vf=0,nrviz,vf_before,nod,sol=999,num,x1,x2,nd; ^ user.cpp:61:38: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] Q[1]=poz; viz[poz]=0; nv[poz]=0; ^