方式一

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

std::vector<std::string> split(const std::string& str, char delim) {
    std::stringstream ss(str);
    std::string item;
    std::vector<std::string> elems;
    while (std::getline(ss, item, delim))
    {
        if (!item.empty())
        {
            elems.push_back(item);
        }
    }
    return elems;
}

int main()
{
    std::string str = "CSDN CaosShangPa";
    std::vector<std::string> subStrs = split(str, ' ');
    for (const auto &subStr : subStrs)
    {
        std::cout  << subStr << std::endl;
    }
    return 0;
}

方式二

#include <string>
#include <vector>
#include <regex>
#include <iostream>

std::vector<std::string> split(const std::string& str, char delim) {
    std::string s;
    s.append(1, delim);
    std::regex reg(s);
    std::vector<std::string> elems(std::sregex_token_iterator(str.begin(), str.end(), reg, -1),
                                   std::sregex_token_iterator());
    return elems;
}

int main()
{
    std::string str = "CSDN CaosShangPa";
    std::vector<std::string> subStrs = split(str, ' ');
    for (const auto &subStr : subStrs)
    {
        std::cout  << subStr << std::endl;
    }
    return 0;
}

原文链接：C++之分割字符串的两种方式-CSDN博客