Compilare: user.cpp: In function ‘int main()’: user.cpp:13:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, last, current, pos = 1, nr = 0; ^ user.cpp:35:11: warning: unused variable ‘fin’ [-Wunused-variable] FILE *fin=freopen("numar3.in","r",stdin); ^ user.cpp:15:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &n); ^