c++文件读取中文乱码

#include<cstdio>
#include<iostream>
#include<algorithm>
#include<vector>
#include<map>
#include<cstring>
#include<fstream>
#include <Windows.h>

using namespace std;
string UTF8ToGB(const char* str)
{
     string result;
     WCHAR *strSrc;
     LPSTR szRes;

     //获得临时变量的大小
     int i = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
     strSrc = new WCHAR[i+1];
     MultiByteToWideChar(CP_UTF8, 0, str, -1, strSrc, i);

     //获得临时变量的大小
     i = WideCharToMultiByte(CP_ACP, 0, strSrc, -1, NULL, 0, NULL, NULL);
     szRes = new CHAR[i+1];
     WideCharToMultiByte(CP_ACP, 0, strSrc, -1, szRes, i, NULL, NULL);

     result = szRes;
     delete []strSrc;
     delete []szRes;

     return result;
}
int main()
{

    ifstream inFile;//输出类
    inFile.open("text.txt");//<<,setf(),endl都可以用到这个对象
    char line[80];
    inFile.getline(line,80);
string    msg=UTF8ToGB(line);
    cout<<msg;
    inFile.close();
}