字符串模拟乘法#include <iostream>#include <vector>#include <string>using namespace std;string multiply(string num1, string num2) { int m = num1.size(); int n = num2.size(); if (m == 0 || n == 0) return "0"; // 边界条件,若有空字符串直接返回"0" // 初始化一个足够大的结果数组 vect...