设三个布尔值为A,B和C....

你可以使用一个k-MAP和一个布尔表达式…

在这种情况下，布尔表达式将是A(B+C) +C

或者if(A && (B || C) || C) ｛ 返回true; ｝ 其他的 返回错误;

而不是写:

if (someExpression) {
    return true;
} else {
    return false;
}

写:

return someExpression;

至于表达式本身，是这样的:

boolean atLeastTwo(boolean a, boolean b, boolean c) {
    return a ? (b || c) : (b && c);
}

或者这个(你觉得哪个更容易理解):

boolean atLeastTwo(boolean a, boolean b, boolean c) {
    return a && (b || c) || (b && c);
}

它只测试a和b一次，c最多测试一次。

参考文献

JLS 15.25条件运算符?：

One thing I haven't seen others point out is that a standard thing to do in the "please write me some code" section of the job interview is to say "Could you improve that?" or "Are you completely happy with that" or "is that as optimized as possible?" when you say you are done. It's possible you heard "how would you improve that" as "this might be improved; how?". In this case changing the if(x) return true; else return false; idiom to just return x is an improvement - but be aware that there are times they just want to see how you react to the question. I have heard that some interviewers will insist there is a flaw in perfect code just to see how you cope with it.

X = OR(a+b,c)

a b c X

1, 1, 0, 1

0, 0, 1, 1

0, 1, 1, 1

Function ReturnTrueIfTwoIsTrue(bool val1, val2, val3))
{
     return (System.Convert.ToInt16(val1) +
             System.Convert.ToInt16(val2) +
             System.Convert.ToInt16(val3)) > 1;
}

有太多方法可以做到这一点……

通过真值表计算:

return (a & b) | (c & (a ^ b));