计算给定的字符的字符长度，中文，英文，数字，符号均为一个字符
在线编译测试：https://onlinegdb.com/zih0Wi3AZ

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#include <iostream>
#include <vector>
int splitWord(const std::string & word )
{
    std::vector<std::string> characters;
    int num = word.size();
    int i = 0;
    while(i < num)
    {
        int size = 1;
        if(word[i] & 0x80)
        {
            char temp = word[i];
            temp <<= 1;
            do{
                temp <<= 1;
                ++size;
            }while(temp & 0x80);
        }
        std::string subWord;
        subWord = word.substr(i, size);
        characters.push_back(subWord);
        i += size;
    }
    return characters.size();
}
int main()
{
  std::string name;
  std::string demo = "这是Liferecords编写的C++第1个程序！"; //25
  
  std::cout<< splitWord(a) << "\n";

}