Compilare: user.cpp: In function ‘int main()’: user.cpp:39:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] A[i][A[i][0]] = aux % 10; ^ user.cpp:48:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] C[C[0]] = aux % 10; ^ user.cpp:28:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pm.in", "r", stdin); ^ user.cpp:29:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pm.out", "w", stdout); ^ user.cpp:30:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^