| A | B | Cin | S1 | C1 | C2 | Cout | S | 说明 |
|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 + 0 + 0 = 0(二进制 00) |
| 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 + 0 + 1 = 1(二进制 01) |
| 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 + 1 + 0 = 1(二进制 01) |
| 0 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 0 + 1 + 1 = 2(二进制 10) |
| 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 + 0 + 0 = 1(二进制 01) |
| 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 1 + 0 + 1 = 2(二进制 10) |
| 1 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 1 + 1 + 0 = 2(二进制 10) |
| 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 + 1 + 1 = 3(二进制 11) |