Compilare: user.cpp: In function ‘int main()’: user.cpp:23:15: warning: unused variable ‘k’ [-Wunused-variable] int n, i, k,ok, j, s, m, a, x, y; ^ user.cpp:23:21: warning: unused variable ‘j’ [-Wunused-variable] int n, i, k,ok, j, s, m, a, x, y; ^ user.cpp:23:24: warning: unused variable ‘s’ [-Wunused-variable] int n, i, k,ok, j, s, m, a, x, y; ^