Compilare: user.cpp: In function ‘int main()’: user.cpp:8:11: warning: unused variable ‘xr’ [-Wunused-variable] int v,xr,xu,n,m,i,c,k=1,j,cr=0,cu=0; ^ user.cpp:8:14: warning: unused variable ‘xu’ [-Wunused-variable] int v,xr,xu,n,m,i,c,k=1,j,cr=0,cu=0; ^ user.cpp:8:23: warning: unused variable ‘c’ [-Wunused-variable] int v,xr,xu,n,m,i,c,k=1,j,cr=0,cu=0; ^