一个5位数，判断它是不是回文数。即12321是回文数，个位与万位相同，十位与千位相同。
程序分析：同5
main( )
{
long ge,shi,qian,wan,x;
scanf("%ld",&x);
wan=_______(1)___________;
qian=_______(2)___________;
shi=x%100/10;
ge=x%10;
if _________(3)_____________ printf("this number is a huiwen\n");
else
printf("this number is not a huiwen\n");
}