ICONV编码转换从UTF-8到ASCII，中文字符的问题

[finrod86921812]

#include <iostream>
#include "iconv.h"

#include <errno.h>
#include <stdio.h>
#include <iostream>
#include <string.h>
using namespace std;

int UTF8ToUnicode(const char *strUTF8,wchar_t **strUnicode) //UTF8 to Unicode
{
    //UTF-8 to UTF-16
    iconv_t conveter  = iconv_open("UTF-16","UTF-8");

    size_t inBytes=strlen(strUTF8) * sizeof(char);
    size_t outBytes=strlen(strUTF8) * sizeof(wchar_t);

    *strUnicode =new wchar_t[outBytes + 1];
    wmemset(*strUnicode,0,outBytes + 1);

    const char* strUTF8_tmp = strUTF8;
    char* strUnicode_tmp= (char*)*strUnicode;

    size_t rc=iconv(conveter,(const char**) &strUTF8_tmp, &inBytes, &strUnicode_tmp, &outBytes);

    iconv_close(conveter);
    if(rc == size_t(0))
    {

        return 1;
    }
    else
    {
        return -1;
    }
}

int UnicodeToUTF8(const wchar_t *strUnicode, char **strUTF8)  //Unicode To UTF8
{
    //UTF-16 to UTF-8
    iconv_t conveter  = iconv_open("UTF-8","UTF-16");

    size_t inBytes=wcslen(strUnicode) * sizeof(wchar_t);
    size_t outBytes=wcslen(strUnicode) * 4;

    *strUTF8 =new char[outBytes + 1];
    memset(*strUTF8,0,outBytes + 1);

    const char* strUnicode_tmp= (char*)strUnicode;
    char* strUTF8_tmp = *strUTF8;

    size_t rc=iconv(conveter,(const char**) &strUnicode_tmp, &inBytes, &strUTF8_tmp, &outBytes);
    iconv_close(conveter);
    if(rc == size_t(0))
    {
        return 1;
    }
    else
    {
        return -1;
    }
}

int UTF8ToASCII(const char *strUTF8, char **strASCII) //UTF8 To ASCII
{
    size_t inBytes=strlen(strUTF8) * sizeof(char);
    size_t outBytes=1024;

    *strASCII =new char[outBytes + 1];
    memset(*strASCII,0,outBytes + 1);

    const char* strUTF8_tmp = strUTF8;
    char* strASCII_tmp= *strASCII;

    char* gbChar = new char[outBytes + 1];
    char* gbChar_tmp = gbChar;

    iconv_t conveter  = iconv_open("gb2312","UTF-8");
    size_t rc=iconv(conveter,(const char**) &strUTF8_tmp, &inBytes, &gbChar_tmp, &outBytes);


    conveter  = iconv_open("ASCII","gb2312");
    gbChar_tmp = gbChar;
    rc=iconv(conveter,(const char**) &gbChar_tmp, &outBytes, &strASCII_tmp, &outBytes);

    iconv_close(conveter);
    if(rc == size_t(0))
    {

        return 1;
    }
    else
    {
        return -1;
    }
}

int main()
{
    char* utf8Char = "hello world 你好";
    wchar_t *utf16Char = NULL;
    char* asciiChar = NULL;

    UTF8ToUnicode(utf8Char,&utf16Char);

    UTF8ToASCII(utf8Char,&asciiChar);

    return 0;
}

这是整个测试程序的代码，目的是要实现UTF8到UTF16和ASCII的编码转换。
调试过程中UTF8到UTF16的转换没有问题，
而直接转换到ASCII，当转换到中文字符“你好”时，就出现错误，errno= EILSEQ /* Illegal byte sequence */

后来考虑先转为gb2312，然后再转成ASCII会不会成功。

"你好“的gb2313编码分别为 C4E3和BAC3 转换成十进制就是 196 227 186 195 ，可见转换成gb2313 时，还是正确的。
但是从gb2313转ASCII码，还是出现同样的错误，转换完world后面的空格（ASCII码为32）然后就结束了，然后报错。

有人知道是什么问题吗？

[libocdf]

完全不知道什么问题！！