3.21while循环(判断一个数是几位数)
#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;
}
#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;
}