How many bytes does double occupy?
The bytes occupied by double: 1. Under the 16-bit compiler, the double occupies 8 bytes; 2. Under the 32-bit compiler, the double occupies 8 bytes; 3. Under the 64-bit compiler, double occupies 8 bytes.
#The operating environment of this article: windows10 system, thinkpad t480 computer.
Bytes occupied by double:
1. 16-bit compiler
char: 1 byte
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
long long: 8 bytes
unsigned long: 4 bytes
##2, 32 Bit compiler
- char: 1 byte
- char* (i.e. pointer variable): 4 bytes (32 The bit addressing space is 2^32, which is 32 bits, which is 4 bytes. The same applies to 64-bit compilers)
- short int: 2 bytes
- int: 4 bytes
- unsigned int: 4 bytes
- float: 4 Bytes
double: 8 bytes
- long: 4 bytes
- long long: 8 bytes
- unsigned long: 4 bytes
3. 64-bit compiler
- char: 1 byte
- 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 long: 8 bytes
- unsigned long: 8 Bytes
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