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The number of bytes in the C language relationship,

Source: Internet
Author: User
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Reprinted from: Portal

16-bit compilers
Char:1 bytes
char* (i.e. pointer variable): 2 bytes
Short Int:2 bytes
Int:2 bytes
Unsigned int:2 bytes
Float:4 bytes
Double:8 bytes
Long:4 bytes
A long long:8 bytes

Unsigned long:4 bytes

32-bit compilers
Char:1 bytes
char* (i.e. pointer variable): 4 bytes (32-bit addressing space is 2^32, which is 32 bit, or 4 bytes. Similarly 64-bit compilers)
Short Int:2 bytes -65536~65535
Int:4 bytes -2147483647~2147483647
Unsigned int:4 bytes
Float:4 bytes
Double:8 bytes
Long:4 bytes
Long Long:8 bytes 1e19
Unsigned long:4 bytes
64-bit compilers
Char:1 bytes
char* (i.e. pointer variable): 8 bytes
Short Int:2 bytes
Int:4 bytes
Unsigned int:4 bytes
Float:4 bytes
Double:8 bytes
Long:8 bytes
A long long:8 bytes
Unsigned long:8 bytes

The number of bytes in the C language relationship,

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