题目
A complex number can be represented as a string on the form “real+imaginaryi” where:
- real is the real part and is an integer in the range [-100, 100].
- imaginary is the imaginary part and is an integer in the range [-100, 100].
- i^2 == -1. Given two complex numbers num1 and num2 as strings, return a string of the complex number that represents their multiplications.
解题思路
先拿到两个数的实部和虚部，求出结果
代码
class Solution:
def complexNumberMultiply(self, num1: str, num2: str) -> str:
a1, b1 = map(int, num1[:-1].split('+'))
a2, b2 = map(int, num2[:-1].split('+'))
return '%d+%di' % (a1 * a2 - b1 * b2, a1 * b2 + a2 * b1)
