C语言：关于输入一个正整数的应用

1.求出它是几位数

2.分别输出每一位数字

3.按逆序输出各位数字，例如原数为123，应输出321

#include <stdio.h>


int Getnums(int n)
{
	int count = 0;
	do
	{
		n /=10;
		count++;
	}while(n != 0);

	return count;
}


void Geteachnum(int n)
{
	int p = Getnums(n);
	int power = 1;
	for(p;p>1;p--)
	{
		power *= 10;
	}

	do
	{
		printf("%d,",n/power);
		n %= power;
		power /= 10;
	}while(n !=0);
	printf("\n");    /*下一组数字转换到下一行*/

}


void Getreversenum(int n)
{
	do
	{
		printf("%d,",n%10);
		n /= 10;
	}while(n != 0);
	printf("\n");    /*下一组数字转换到下一行*/
}

int main()
{
	printf("该数为%d位数\n",Getnums(1234));             /*测试用例*/
	printf("该数为%d位数\n",Getnums(0));
	printf("该数为%d位数\n",Getnums(12345));
	printf("该数为%d位数\n",Getnums(456789123));
	Geteachnum(1234);
	Geteachnum(0);
	Geteachnum(12345);
	Geteachnum(456789123);
	Getreversenum(1234);
	Getreversenum(0);
	Getreversenum(12345);
	Getreversenum(456789123);
	
	return 0;
}