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class Solution { public: int Add(int num1, int num2)//不用加减乘除做加法. { int n1,n2; n1 = (num1&num2)<<1; n2 = num1^num2; while (n1&n2) { num1 = n1;num2 = n2; n1 = (num1&num2)<<1; n2 = num1^num2; } return n1|n2; }};
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