linux下utf8转gbk C语言实现

#include
#include
#include

main()
{
     int cd;
    
     unsigned char utf_8[10]="中";  
     unsigned char gb[10]={0};  
     unsigned char *pi1    =  utf_8;
     unsigned char **pi2    =  &pi1;
     unsigned char *po1    =  gb;
     unsigned char **po2    =  &po1;
     size_t           ilen        = 3;
     size_t           olen    = 2;
    
     iconv_t conveter;

    if((conveter = iconv_open("gbk", "utf-8")) == (iconv_t)-1)
    {

        printf("iconv open fail \n");
        return 1;
    }
    else
    {
        printf("iconv open ok \n");    
    }
    
    iconv(conveter,(char**)pi2,&ilen,(char**)po2,&olen);

 
     printf("\r\n utf_8[0] = %x \r\n",utf_8[0]);
     printf("\r\n utf_8[1] = %x \r\n",utf_8[1]);
     printf("\r\n utf_8[2] = %x \r\n",utf_8[2]);

     printf("\r\n gb[0] = %x \r\n",gb[0]);
     printf("\r\n gb[1] = %x \r\n",gb[1]);

}