fgetpos函数这样用为何错?

Question

fp = _tfopen(TEXT("C:\\1.txt"),TEXT("r+b"));
fseek(fp,2,0);
fgetpos(fp,pos);

Answer 1

代码是
fpos_t *spos;
fpos_t *epos;
fp = _tfopen(TEXT("C:\\1.txt"),TEXT("r+b"));
fseek(fp,2,0);

wint_t c;
c = fgetwc(fp);
while(c!=WEOF)
{
fgetpos(fp,spos);//这儿报错
int i = 0;
while(c!=0x000d)
{
i++;
c = fgetwc(fp);
}
fgetpos(fp,epos);
fsetpos(fp,spos);
wchar_t *pBuf = new wchar_t[(i+1)];
wmemset(pBuf,0,(i+1));
fread(pBuf,2,(i+1),fp);
delete[] pBuf;
fsetpos(fp,epos);
}
fclose(fp);
错误是int __cdecl fgetpos (
        FILE *stream,
        fpos_t *pos
        )
{
#ifdef _MAC
        int posl = ftell(stream);        *pos = (fpos_t) posl;        if ( posl != -1L )
#else  /* _MAC */
        if ( (*pos = _ftelli64(stream)) != -1i64 )//错误所在
#endif  /* _MAC */
                return(0);
        else
                return(-1);
}