c++整数快读模板

inline char get()
{
    static char buf[1024];
    static int pos=0,size=0;
    if(pos==size)
    {
        size=fread(buf,1,1024,stdin);
        pos=0;
        if(!size) return EOF;
        else return buf[pos++];
    }
    else return buf[pos++];     
}
int read()
{
    int sum=0,fh=1;
    char ch=get();
    while(!(ch>='0' && ch<='9'))
    {
        if(ch=='-') fh=-1;
        ch=get();
    }
    while(ch>='0' && ch<='9' && ch!=EOF) sum=sum*10+ch-48,ch=get();
    return sum*fh;
}