//count digits
#include "stdafx.h"
#include <conio.h>

void main(void)
{
	printf("Please enter n>=1 ");
	int n;
	scanf("%d",&n);
	if(n<=0) printf("Ileagal number!\n");
	else
	{
		int count=1;					 // at least 1 digit
		if(n/10 != 0) count++; // at least 2 digit
		n/=10;
		if(n/10 != 0) count++; // at least 3 digit
		n/=10;
		if(n/10 != 0) count++; // at least 4 digit
		n/=10;
		if(n/10 != 0) count++; // at least 5 digit
		n/=10;
		if(n/10 != 0) count++; // at least 6 digit
		n/=10;
		if(n/10 != 0) count++; // at least 7 digit
		n/=10;
		if(n/10 != 0) count++; // at least 8 digit
		n/=10;
		if(n/10 != 0) count++; // at least 9 digit
		n/=10;
		if(n != 0) count++; // 10 digit		
		printf("\n%d\n",count);
	}
	_getch();
}