如何在C中读取/写入UTF8文本文件？

这段代码对我有用：

#include <stdio.h>#include <wchar.h>#include <stdlib.h>#include <locale.h>int main (){  setlocale(LC_ALL, "en_US.UTF-8");  FILE * fin;  FILE * fout;  wint_t wc;  fin=fopen ("in.txt","r");  fout=fopen("out.txt","w");  while((wc=fgetwc(fin))!=WEOF){        // work with: "wc"  }  fclose(fin);  fclose(fout);  printf("File has been created...n");  return 0;}