[编程入门]数字的处理与判断 （C语言代码）

解题思将输入数的每位数字保存下来，然后按要求输出；

注意事项:数组的界限问题。

参考代码:

#include<stdio.h>

#include<stdlib.h>

int main()

{

     int n;

     scanf("%d", &n);

     int counts = 0;

     int t = n;

     while (t != 0)

     {

         counts++;

         t = t / 10;

     }

     printf("%d\n", counts);

     int *pt;

     pt = (int *)malloc((counts)*sizeof(int));

     for (int i = 0; i < counts; i++)

     {

         pt[i] = n % 10;

         n = n / 10;

     }

     for (int i = counts-1; i >= 0; i--)

     {

         printf("%d ", pt[i]);

     }

     printf("\n");

     for (int i = 0; i <= counts-1; i++)

     {

         printf("%d",pt[i]);

     }

     free(pt);

     return 0;

}