十进制转二进制
| 十进制 | 二进制 |
|---|---|
| 0 | 0 |
| 0.25 | 10 |
| 0.5 | 1 |
| 0.75 | 11 |
乘二取整法
例一: 0.75的二进制是11
| 0.75 | 取整 | 余 |
|---|---|---|
| 0.75 * 2 = 1.5 | 1 | 0.5 |
| 0.5 * 2 = 1 | 1 | 0 |
例二: 0.1的二进制是0001100110011...
| 0.1 | 取整 | 余 |
|---|---|---|
| 0.1 * 2 = 0.2 | 0 | 0.2 |
| 0.2 * 2 = 0.4 | 0 | 0.4 |
| 0.4 * 2 = 0.8 | 0 | 0.8 |
| 0.8 * 2 = 1.6 | 1 | 0.6 |
| 0.6 * 2 = 1.2 | 1 | 0.2 |
| 0.2 * 2 = 0.4 | 0 | 0.4 |
| 0.4 * 2 = 0.8 | 0 | 0.8 |
| 0.8 * 2 = 1.6 | 1 | 0.6 |
| 0.6 * 2 = 1.2 | 1 | 0.2 |
| 无限循环 | 0001100111.... |