#include <stdio.h>
int main()
{
long long a;
int count=0;
printf("请输入一个整数:");
scanf("%lld",&a);
while(a!=0)
{
a/=10;
count++;
}
printf("输入的数字是%d位数。",count);
}
Among them, long long is a long integer and lld is the input method of this type. In this program, count is a counter that records the number of digits entered.
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