整形数据取值范围（int、long、long long）
| 类型 | 范围 |
|---|---|
| unsigned int | 0～4294967295 |
| int | -2147483648～2147483647 |
| unsigned long | 0～4294967295 |
| long | -2147483648～2147483647 |
| unsigned long long | 0 ~ 18446744073709551615 |
| long long | -9223372036854775808～9223372036854775807 |
| __int64 | -9223372036854775808～9223372036854775807 |