Compilare: user.cpp: In function ‘void swp()’: user.cpp:100:17: warning: unused variable ‘l1’ [-Wunused-variable] int i1,i2,k,l1,l2,i,j,dir,la,lb; ^ user.cpp:100:20: warning: unused variable ‘l2’ [-Wunused-variable] int i1,i2,k,l1,l2,i,j,dir,la,lb; ^ user.cpp:100:27: warning: unused variable ‘dir’ [-Wunused-variable] int i1,i2,k,l1,l2,i,j,dir,la,lb; ^ user.cpp:100:31: warning: unused variable ‘la’ [-Wunused-variable] int i1,i2,k,l1,l2,i,j,dir,la,lb; ^ user.cpp:100:34: warning: unused variable ‘lb’ [-Wunused-variable] int i1,i2,k,l1,l2,i,j,dir,la,lb; ^