Compilare: user.cpp: In function ‘int main()’: user.cpp:31:21: warning: unused variable ‘s’ [-Wunused-variable] int n, k, x, y, s, c, n1, i; ^ user.cpp:31:24: warning: unused variable ‘c’ [-Wunused-variable] int n, k, x, y, s, c, n1, i; ^ user.cpp:31:27: warning: unused variable ‘n1’ [-Wunused-variable] int n, k, x, y, s, c, n1, i; ^