001 data type [basic]

Catalog

Basic data types

sizeof  Data type size

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Basic data types

         Data types are used to define variables

        char                Character data type

        short              Short

        int                  integer

        long                Long integer

        long long        Longer integers

        float              Single-precision floating-point

        double          Double precision floating point

sizeof  Data type size

        sizeof yes C A key word of language , Calculate the size of the data type , Unit is byte

            sizeof(char)                  1

            sizeof(short)                 2

            sizeof(int)                     4

            sizeof(long)                  4

            sizeof(long long)          8

            sizeof(float)                  4

            sizeof(double)              8

        A byte is 8 position , Each can represent 0 and 1 Two figures

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