Eroare de compilare: user.cpp: In function ‘void CountingSort(size_t, size_t*, size_t*, size_t)’: user.cpp:18:43: warning: operation on ‘i’ may be undefined [-Wsequence-point] for(size_t i = 0x0; i != 0x7FF; index[++i] = index[~-i] + frequence[~-i]); ^~~ user.cpp:18:43: warning: operation on ‘i’ may be undefined [-Wsequence-point] user.cpp: In function ‘i32 main()’: user.cpp:49:5: error: ‘cin’ was not declared in this scope cin >> N >> A >> B >> C; ^~~ user.cpp:57:15: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * 0x3D + 0x9) % 0x367C2DC9; ^~~ user.cpp:64:15: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * 0xF + 0x3C) % 0x7CE67EF6; ^~~ user.cpp:71:15: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * 0x2E + 0x22) % 0x6F6E4E7B; ^~~ user.cpp:78:15: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * 0x53 + 0x2E) % 0xF4240; ^~~ user.cpp:85:15: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * 0x1E + 0xE) % 0x65759; ^~~ user.cpp:92:15: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * A + B) % C; ^~~ user.cpp: At global scope: user.cpp:25:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void put_number(size_t x) ^~~~~~~~~~ user.cpp:12:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void CountingSort(size_t N, size_t A[], size_t B[], size_t digit) ^~~~~~~~~~~~ user.cpp: In function ‘i32 main()’: user.cpp:47:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.in", "r", stdin); ^ user.cpp:102:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.out", "w", stdout); ^