Compilare: user.cpp: In function ‘void atribuie(char*, long long unsigned int)’: user.cpp:12:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[++a[0]] = x % 10; ^ user.cpp: In function ‘int main()’: user.cpp:67:24: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 2 has type ‘long long unsigned int*’ [-Wformat=] scanf("%ld", &N); ^ user.cpp:60:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("quadratum.in", "rt", stdin); ^ user.cpp:61:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("quadratum.out" , "wt", stdout); ^ user.cpp:65:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.cpp:67:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld", &N); ^