类型名称 字节数 取值范围
signed char 1 -2^7 ~ 2^7-1 -128～+127
short int 2 -2^14 ~ 2^14-1 -32768～+32767
int 4 -2^31 ~ 2^31-1 -2147483648～+2147483647
unsigned int 4 0 ~ 2^32-1 0 ~ 4294967295
long int 4 -2^31 ~ 2^31-1 -2147483648～+2141483647
unsigned long 4 0 ~ 2^32-1 0～4294967295
long long int 8 -2^63 ~ 2^63-1 -9223372036854775808～+9223372036854775807
unsigned long long 8 0 ~ 2^64-1 18446744073709551615
__int64的最大值：9223372036854775807
__int64的最小值：-9223372036854775808
unsigned __int64的最大值：18446744073709551615
Original: https://www.cnblogs.com/Slience-me/p/16341821.html
Author: Slience_me
Title: short, int, long, long long各个类型的范围
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