Compilare: user.cpp: In function ‘int main()’: user.cpp:12:21: warning: unused variable ‘_l’ [-Wunused-variable] int N, l, r, i, _l, _r, s = 0, *p1, *p2; ^ user.cpp:12:25: warning: unused variable ‘_r’ [-Wunused-variable] int N, l, r, i, _l, _r, s = 0, *p1, *p2; ^ user.cpp:12:37: warning: unused variable ‘p1’ [-Wunused-variable] int N, l, r, i, _l, _r, s = 0, *p1, *p2; ^ user.cpp:12:42: warning: unused variable ‘p2’ [-Wunused-variable] int N, l, r, i, _l, _r, s = 0, *p1, *p2; ^