【C语言】给一个不多于5位的正整数，要求：一、求它是几位数，二、逆序打印出各位数字

#include<stdio.h>
#include<stdlib.h>

int main()
{
	long x;
	long a, b, c, d, e;
	scanf("%ld", &x);
	a = x / 10000;
	b = (x / 1000) % 10;
	c = (x / 100) % 10;
	d = (x / 10) % 10;
	e = x % 10;
	if (a != 0)
		printf("它是5位数，逆序为：%ld%ld%ld%ld%ld\n", e, d, c, b, a);
	else if (b != 0)
		printf("它是4位数，逆序为：%ld%ld%ld%ld\n", e, d, c, b);
	else if (c != 0)
		printf("它是3位数，逆序为：%ld%ld%ld\n", e, d, c);
	else if (d != 0)
		printf("它是2位数，逆序为：%ld%ld\n", e, d);
	else
		printf("它是1位数，逆序为：%ld\n", e);
	system("pause");
	return 0;
}