Compilare: user.cpp: In function ‘int main()’: user.cpp:14:9: warning: unused variable ‘i’ [-Wunused-variable] int v, i, max_poz; ^ user.cpp:16:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arc.in","r",stdin); ^ user.cpp:17:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arc.out","w",stdout); ^ user.cpp: In function ‘int keres_max()’: user.cpp:90:9: warning: ‘maxi’ may be used uninitialized in this function [-Wmaybe-uninitialized] return maxi; ^ user.cpp: In function ‘int main()’: user.cpp:29:23: warning: ‘maxi’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (hossz[max_poz] >= 3) { ^