Compilare: user.cpp: In function ‘void Sweep()’: user.cpp:42:31: warning: variable ‘st’ set but not used [-Wunused-but-set-variable] { int i,j,actv=0,acto=0,lx,ly,st,dr,first,sol=0,del=0; ^ user.cpp:42:34: warning: variable ‘dr’ set but not used [-Wunused-but-set-variable] { int i,j,actv=0,acto=0,lx,ly,st,dr,first,sol=0,del=0; ^ user.cpp:42:37: warning: unused variable ‘first’ [-Wunused-variable] { int i,j,actv=0,acto=0,lx,ly,st,dr,first,sol=0,del=0; ^ user.cpp:42:49: warning: variable ‘del’ set but not used [-Wunused-but-set-variable] { int i,j,actv=0,acto=0,lx,ly,st,dr,first,sol=0,del=0; ^