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leetcode 0371

admin 11月 13, 2020 0

Desicription

Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -.

Example 1:

1 2	Input: a = 1, b = 2 Output: 3

Example 2:

1 2	Input: a = -2, b = 3 Output: 1

Solution

class  {
public:
    int getSum(int a, int b) {
        __asm__(
                "addl %%ebx, %%eax;"
                : "=a"(a)
                : "a"(a), "b"(b)
                );
        return a;
    }
};