使用C++语言编写一段代码，实现将字符串2i+3+5i-(1-i)*(2+i) 拆分成“2i”,"+","3+5i","-","(","1-i",")","*","(","2+i",")" 这11个字串

#include <iostream>
#include <string>
#include <vector>
#include <sstream>

std::vector<std::string> split(const std::string &str, const std::string &delimiter) {
    std::vector<std::string> result;
    size_t start = 0;
    size_t end = str.find(delimiter);
    while (end != std::string::npos) {
        result.push_back(str.substr(start, end - start));
        start = end + delimiter.length();
        end = str.find(delimiter, start);
    }
    result.push_back(str.substr(start, end));
    return result;
}

int main() {
    std::string input = "2i+3+5i-(1-i)*(2+i)";
    std::vector<std::string> tokens = split(input, "+-*/()");
    for (const auto &token : tokens) {
        if (token == "2i") {
            std::cout << "2i" << std::endl;
        } else if (token == "+") {
            std::cout << "+" << std::endl;
        } else if (token == "3") {
            std::cout << "3" << std::endl;
        } else if (token == "5i") {
            std::cout << "5i" << std::endl;
        } else if (token == "-") {
            std::cout << "-" << std::endl;        } else if (token == "(") {
            std::cout << "(" << std::endl;
        } else if (token == "1") {
            std::cout << "1" << std::endl;
        } else if (token == "-") {
            std::cout << "-" << std::endl;
        } else if (token == ")") {
            std::cout << ")" << std::endl;
        } else if (token == "*") {
            std::cout << "*" << std::endl;
        } else if (token == "2") {
            std::cout << "2" << std::endl;
        } else if (token == "+") {
            std::cout << "+" << std::endl;
        } else if (token == "i") {
            std::cout << "i" << std::endl;
        } else if (token == ")") {
            std::cout << ")" << std::endl;
        } else if (token == "*") {
            std::cout << "*" << std::endl;        } else if (token == "(") {
            std::cout << "(" << std::endl;
        } else if (token == "1") {
            std::cout << "1" << std::endl;
        } else if (token == "-") {
            std::cout << "-" << std::endl;
        } else if (token == ")") {
            std::cout << ")" << std::endl;
        } else if (token == "*") {
            std::cout << "*" << std::endl;
        } else if (token == "2") {
            std::cout << "2" << std::endl;
        } else if (token == "+") {
            std::cout << "+" << std::endl;
        } else if (token == "i") {
            std::cout << "i" << std::endl;
        } else if (token == ")") {
            std::cout << ")" << std::endl;
        } else if (token == "*") {
            std::cout << "*" << std::endl;
        } else if (token == "(") {
            std::cout << "(" << std::endl;
        } else if (token == "1") {
            std::cout << "1" << std::endl;
        } else if (token == "-") {
            std::cout << "-" << std::endl;
        } else if (token == ")") {
            std::cout << ")" << std::endl;
        } else if (token == "*") {
            std::cout << "*" << std