gb18030 to ufg-8 in Linux

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <iconv.h>

int code_convert(char *from_charset,char *to_charset,char *inbuf,int inlen,char *outbuf,int outlen)
{
        iconv_t cd;
        int rc;
        char **pin = &inbuf;
        char **pout = &outbuf;

        cd = iconv_open(to_charset,from_charset);
        if (cd==0)
        {
            printf("no support\n");
                return -1;
        }
        memset(outbuf,0,outlen);
        if (iconv(cd,pin,&inlen,pout,&outlen) == -1)
        {
            printf("conv error\n");
                return -1;
        }
        iconv_close(cd);
        return 0;
}

int u2g(char *inbuf,int inlen,char *outbuf,int outlen)
{
        return code_convert("utf-8","#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <iconv.h>

int code_convert(char *from_charset,char *to_charset,char *inbuf,int inlen,char *outbuf,int outlen)
{
        iconv_t cd;
        int rc;
        char **pin = &inbuf;
        char **pout = &outbuf;

        cd = iconv_open(to_charset,from_charset);
        if (cd==0)
        {
            printf("no support\n");
                return -1;
        }
        memset(outbuf,0,outlen);
        if (iconv(cd,pin,&inlen,pout,&outlen) == -1)
        {
            printf("conv error\n");
                return -1;
        }
        iconv_close(cd);
        return 0;
}

int u2g(char *inbuf,int inlen,char *outbuf,int outlen)
{
        return code_convert("utf-8","gb18030",inbuf,inlen,outbuf,outlen);
}

int g2u(char *inbuf,size_t inlen,char *outbuf,size_t outlen)
{
        return code_convert("gb18030","utf-8",inbuf,inlen,outbuf,outlen);
}

int main()
{
 char str_in[] = "王弢";
 char str_out[6] = {'1'};
 u2g(str_in, strlen(str_in), str_out, 4);
 printf("%d\n", strlen(str_out));
 printf("%d\n", strchr(str_out, '|') - str_out);
 return 0;
}",inbuf,inlen,outbuf,outlen);
}

int g2u(char *inbuf,size_t inlen,char *outbuf,size_t outlen)
{
        return code_convert("gb18030","utf-8",inbuf,inlen,outbuf,outlen);
}

int main()
{
 char str_in[] = "王弢";
 char str_out[6] = {'1'};
 u2g(str_in, strlen(str_in), str_out, 4);
 printf("%d\n", strlen(str_out));
 printf("%d\n", strchr(str_out, '|') - str_out);
 return 0;
}