这就是一个随记，方便自己用的。
| 名称(可加) | 所占字节 | 数据范围(以 $2^n$ 表示) |
|---|---|---|
(signed) int |
4 |
-2147483648 ~ 2147482647 ($-2^{31}$ ~ $2^{31}-1$) |
unsigned int |
4 |
0 ~ 4294967295 ($0$ ~ $2^{32}-1$) |
(signed) long (int) |
4 |
-2147483648 ~ 2147483647 ($-2^{31}$ ~ $2^{31}-1$) |
unsigned long (int) |
4 |
0 ~ 4294967295 ($0$ ~ $2^{32}-1$) |
long long |
8 |
-9223372036854775808 ~ 9223372036854775807 ($-2^{63}$ ~ $2^{63}-1$) |
unsigned long long |
8 |
0 ~ 18446744073709551615 ($0$ ~ $2^{64}-1$) |
(signed) short (int) |
2 |
-32768 ~ 32767 ($-2^{15}$ ~ $2^{15}-1$) |
unsigned short (int) |
2 |
0 ~ 65535 ($0$ ~ $2^{16}-1$) |
float |
4 |
3.4E +/- 38 |
double |
8 |
1.7E +/- 308 |
long double |
8 |
1.7E +/- 308 |
bool |
1 |
true or false or 1 or 0 |
char |
1 |
-128 ~ 127 ($-2^{7}$ ~ $2^{7}-1$) |