Compilare: user.cpp: In function ‘int main()’: user.cpp:52:10: warning: unused variable ‘j’ [-Wunused-variable] int n,i,j,x,y,total=0; ^ user.cpp:5:11: warning: unused variable ‘first’ [-Wunused-variable] #define x first ^ user.cpp:52:12: note: in expansion of macro ‘x’ int n,i,j,x,y,total=0; ^ user.cpp:6:11: warning: unused variable ‘second’ [-Wunused-variable] #define y second ^ user.cpp:52:14: note: in expansion of macro ‘y’ int n,i,j,x,y,total=0; ^ user.cpp:52:16: warning: unused variable ‘total’ [-Wunused-variable] int n,i,j,x,y,total=0; ^