#include<stdio.h>
void main()
{
unsigned int a;
printf("请输入一个四位正数:");
scanf("%d",&a);
if (a>=1000&&a<=9999)
{
printf("千位数为:%d\n百位数为:%d\n",a/1000,a%1000/100);
printf("十位数为%d\n个位数为%d\n",a%100/10,a%10);
printf("四位数的和为%d\n",a/1000+a%1000/100+a%100/10+a%10);
}
else
printf("输入数据不合规!\n");
}