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cowcul
- 有4个字母:U、C、D、V,它们可以相加,也能产生进位,如图3-7所示:V+V=V,U+D=V,但他要进U位现有2个由上述字母构成的“数”(五位),只对第2个数进行操作,有3种操作。-Has four letters: U, C, D, V, they can add up, but also can produce binary, 3-7 shown in Figure: V+ V = V, U+ D = V, but he want into the U-bit is have two le