问题描述
Given two strings representing two
complex numbers.
You need to return a string representing their multiplication. Note i2
= -1 according to the definition.
Example
Input: "1+1i", "1+1i"
Output: "0+2i"
Explanation: (1 + i) * (1 + i) = 1 + i2 + 2 * i = 2i, and you need convert it to the form of 0+2i.
/**
* @param {string} aw
* @param {string} b
* @return {string}
*/
var complexNumberMultiply = function(a, b) {
var a1 = a.split("+");
var b1 = b.split("+");
var a2 = a1[1].split("i");
var b2 = b1[1].split("i");
console.log(a1,a2);
return a1[0]*b1[0]-a2[0]*b2[0] + "+" + (a1[0]*b2[0]+a2[0]*b1[0])+"i";
};
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