各种基本数据类型的范围和精度如何？

Type Name       Bytes          Other Names               Range of Values                                                           

  int                        *               signed (int)                 System dependent                                                          

  char                    1              signed char                       -128 to 127                                                               

  long                   4               (signed) long int          -2,147,483,648 to 2,147,483,647

  float                   4                     none                         3.4E +/- 38 (7 digits)

  double             8                      none                      1.7E +/- 308 (15 digits)

  long double     10                   none                    1.2E +/- 4932 (19 digits)