Compilare: user.cpp: In function ‘int main()’: user.cpp:14:24: warning: unused variable ‘y2’ [-Wunused-variable] int n,cop,x,y,i,x1,y2,x2,y1,cnt,prim=1,ultim=1,lin,col,j; ^ user.cpp:14:27: warning: unused variable ‘x2’ [-Wunused-variable] int n,cop,x,y,i,x1,y2,x2,y1,cnt,prim=1,ultim=1,lin,col,j; ^ user.cpp:14:33: warning: unused variable ‘cnt’ [-Wunused-variable] int n,cop,x,y,i,x1,y2,x2,y1,cnt,prim=1,ultim=1,lin,col,j; ^ user.cpp:14:60: warning: unused variable ‘j’ [-Wunused-variable] int n,cop,x,y,i,x1,y2,x2,y1,cnt,prim=1,ultim=1,lin,col,j; ^