52页21题

#include<stdio.h>

int main()

{

 int num,x,y,z;

 printf("please input a number:");

 scanf("%d",&num);

 x==num%10;

 y==num%10/10;

 z==num/100;

 if(num==x*x*x+y*y*y+z*z*z)

 printf("Yes!");

 else

 printf("No!");

return 0;

}