C++经典算法题-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。

    main( )
    {
        long ge,shi,qian,wan,x;
        scanf("%ld",&x);
        wan=x/10000;
        qian=x%10000/1000;
        shi=x%100/10;
        ge=x%10;
        if (ge==wan&&shi==qian)/*个位等于万位并且十位等于千位*/
            printf("this number is a huiwen\n");
        else
            printf("this number is not a huiwen\n");
    }