Compilare: user.cpp: In function ‘void gen()’: user.cpp:25:9: warning: unused variable ‘len’ [-Wunused-variable] int len = 1, pas = 0, mx = 0; ^ user.cpp:25:18: warning: unused variable ‘pas’ [-Wunused-variable] int len = 1, pas = 0, mx = 0; ^ user.cpp: In function ‘int main()’: user.cpp:63:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:69:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^