Linux CPP 中文处理 打印单个汉字

#include <iostream>
#include <vector>
using namespace std;

vector<string> Char2Token(const char* szSent){
    vector<string> tokens;
    int i = 0;
    while (szSent[i] != '\0')
    {
        if (szSent[i]<0){//汉字
            char szTmp[4];// = {0};
            szTmp[0] = szSent[i];
            szTmp[1] = szSent[i+1];
            szTmp[2] = szSent[i+2];
            szTmp[3] = 0;
            string strTmp(szTmp);
            tokens.push_back(strTmp);
            i+=3;
        }else{
            char szTmp[3] = {0};
            szTmp[0] = szSent[i];
            string strTmp(szTmp);
            tokens.push_back(strTmp);
            i++;
        }
    }
    return tokens;
}

int main(int argc, char const *argv[])
{


    char ch0[]={"金古江湖战旗春秋"};

    vector<string> vec_str0 = Char2Token(ch0);
    for(int i=0; i<vec_str0.size(); i++)
    {
    cout<<vec_str0[i]<<endl;
    }
    cout<<endl;
    cout<<endl;
    char ch1[]={"金古江湖 战旗春秋"};

    vector<string> vec_str1 = Char2Token(ch1);
    for(int i=0; i<vec_str1.size(); i++)
    {
    cout<<vec_str1[i]<<endl;
    }
    cout<<endl;
    cout<<endl;
    char ch2[]={"金古江湖A战旗春秋"};

    vector<string> vec_str2 = Char2Token(ch2);
    for(int i=0; i<vec_str2.size(); i++)
    {
    cout<<vec_str2[i]<<endl;
    }

    return 0;
}