3.21while循环（判断一个数是几位数）

https://github.com/mzdbxwg/xiao/edit/main/3.21while%E5%BE%AA%E7%8E%AF%EF%BC%88%E5%88%A4%E6%96%AD%E4%B8%80%E4%B8%AA%E6%95%B0%E6%98%AF%E5%87%A0%E4%BD%8D%E6%95%B0%EF%BC%89

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>

int main()
{
	int x;
	int n = 0;
	scanf("%d", &x);
	n++;
	x /= 10;
	while (x > 0)
	{
		n++;
		x /= 10;
	}
	printf("%d\n", n);
	return 0;
}