Compilare: user.cpp: In function ‘int main()’: user.cpp:10:13: warning: unused variable ‘i’ [-Wunused-variable] int n, i, x, k = 1; ^ user.cpp:10:16: warning: unused variable ‘x’ [-Wunused-variable] int n, i, x, k = 1; ^ user.cpp:10:19: warning: unused variable ‘k’ [-Wunused-variable] int n, i, x, k = 1; ^