Some Notes

Be hard-working every day.

C++ 数据范围

发表于2023-07-02分类于Programming

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` ( $- 2^{7}$ ~ $2^{7} - 1$ )