数据类型取值范围

double型：-1.7*10^308~+1.7*10^308

char -128 ~ 127 (1 Byte)
short -32767 ~ 32768 (2 Bytes)
unsigned short 0 ~ 65536 (2 Bytes)
int -2147483648 ~ 2147483647 (4 Bytes)
unsigned int 0 ~ 4294967295 (4 Bytes)
long == int
long long -9223372036854775808 ~ 9223372036854775807 (8 Bytes)