#include <stdio.h>

 int main()

 {

     unsigned int a = , b = ;

     while (a>)

     {

         a++;

     }

     printf("unsigned int数据类型最大数是：%u\n", a- );

     unsigned int n = a - ;

     do

     {

         n = n / ;

         b++;

     } while (n > );

     printf("unsigned int数据类型最大数共有%d位。\n", b);

     return ;

 }