Compilare: user.cpp: In function ‘int main()’: user.cpp:21:12: warning: unused variable ‘nr’ [-Wunused-variable] int n,i,j,nr=0,k,x,y,nrx=0,nry=0; ^ user.cpp:21:17: warning: unused variable ‘k’ [-Wunused-variable] int n,i,j,nr=0,k,x,y,nrx=0,nry=0; ^ user.cpp:21:19: warning: unused variable ‘x’ [-Wunused-variable] int n,i,j,nr=0,k,x,y,nrx=0,nry=0; ^ user.cpp:21:21: warning: unused variable ‘y’ [-Wunused-variable] int n,i,j,nr=0,k,x,y,nrx=0,nry=0; ^ user.cpp:21:23: warning: unused variable ‘nrx’ [-Wunused-variable] int n,i,j,nr=0,k,x,y,nrx=0,nry=0; ^ user.cpp:21:29: warning: unused variable ‘nry’ [-Wunused-variable] int n,i,j,nr=0,k,x,y,nrx=0,nry=0; ^