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Οι βασικοί τύποι δεδομένων στη C++ είναι κατά βάση κοινοί με τους τύπους δεδομένων στη C, με κάποιες επεκτάσεις.
| Group | Type names | Notes on size & precision |
|---|---|---|
| Character types | char | Exactly one byte in size. At least 8 bits. |
| char16_t | Not smaller than char. At least 16 bits. | |
| char32_t | Not smaller than char16_t. At least 32 bits. | |
| wchar_t | Can represent the largest supported character set. | |
| Integer types (signed) | char | Same size as char. At least 8 bits. |
| signed short int | Not smaller than char. At least 16 bits. | |
| signed int | Not smaller than short. At least 16 bits. | |
| signed long int | Not smaller than int. At least 32 bits. | |
| signed long long int | Not smaller than long. At least 64 bits. | |