Compilare: user.cpp: In member function ‘void BIGN::operator+=(BIGN)’: user.cpp:21:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] c[++ c[0]] = t % 10; ^ user.cpp: In function ‘int main()’: user.cpp:37:21: warning: unused variable ‘semn’ [-Wunused-variable] int x, y, i, j, semn, curr, nxt; ^ user.cpp:35:33: 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:36:35: 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:39:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^