数据类型名称字节数别名取值范围int*signed,signed int由操作系统决定，即与操作系统的＂字长＂有关unsigned int*unsigned由操作系统决定，即与操作系统的＂字长＂有关__int81char,signed char–128 到 127__int162short,short int,signed short int–32,768 到 32,767__int324signed,signed int–2,147,483,648 到 2,147,483,647__int648无–9,223,372,036,854,775,808 到 9,223,372,036,854,775,807bool1无false 或 truechar1signed char–128 到 127unsigned char1无0 到 255short2short int,signed short int–32,768 到 32,767unsigned short2unsigned short int0 到 65,535long4long int,signed long int–2,147,483,648 到 2,147,483,647long long8none (but equivalent to __int64)–9,223,372,036,854,775,808 到 9,223,372,036,854,775,807unsigned long4unsigned long int0 到 4,294,967,295enum*无由操作系统决定，即与操作系统的＂字长＂有关float4无3.4E +/- 38 (7 digits)double8无1.7E +/- 308 (15 digits)long double8无1.7E +/- 308 (15 digits)unsigned long long8 9,223,372,036,854,775,807*2
