输出个数字并且判断是几位数，并且倒序输出。

#include <stdio.h>
#include <math.h>
int main()
{
    int num,place,indiv,ten,hundred,thousand,ten_thousand;
    printf("输入一个数\n");
    scanf("%d",&num);
    if(num>9999)
        place=5;
    else if(num>999)
        place=4;
    else if(num>99)
        place=3;
    else if(num>9)
        place=2;
    else
        place=1;// 几位数结果
        printf("位数%d\n",place);
        printf("每一个数字为\n");
        ten_thousand=num/10000;
        printf("%d\n",ten_thousand);
        thousand=(num-ten_thousand*10000)/1000;
        printf("%d\n",thousand);
        hundred=(num-ten_thousand*10000-thousand*1000)/100;
        printf("%d\n",hundred);
        ten=(num-ten_thousand*10000-thousand*1000-hundred*100)/10;
        printf("%d\n",ten);
        indiv=num%10;
        printf("%d\n",indiv);
        switch(place)
        {
        case 5:
            printf("反序数字为：\n");
            printf("%d%d%d%d%d\n",indiv,ten,hundred,thousand,ten_thousand);break;
        case 4:
            printf("反序数字为：\n");
            printf("%d%d%d%d\n",indiv,ten,hundred,thousand);break;
        case 3:
            printf("反序数字为：\n");
            printf("%d%d%d\n",indiv,ten,hundred);break;
        case 2:
            printf("反序数字为：\n");
            printf("%d%d\n",indiv,ten);break;
        case 1:
            printf("反序数字为：\n");
            printf("%d\n",indiv);
        }
        return 0;
}