Java prints out the implementation code for all daffodils
- 2020-06-12 09:03:18
- OfStack
Title: Print out all "daffodils". A "daffodils" is a three-digit number whose cube sum equals the number itself. For example, 153 is a number of daffodils because 153=1 to the third +5 to the third +3 to the third.
Program analysis: for cycle was used to control 100-999 Numbers, and each number was decomposed into the ones, 10 and hundreds digits.
Program design:
public class exp2{
public static void main(String args[]){
int i=0;
math mymath = new math();
for(i=100;i<=999;i++)
if(mymath.shuixianhua(i)==true)
System.out.println(i);
}
}
class math
{
public int f(int x)
{
if(x==1 || x==2)
return 1;
else
return f(x-1)+f(x-2);
}
public boolean iszhishu(int x)
{
for(int i=2;i<=x/2;i++)
if (x % 2==0 )
return false;
return true;
}
public boolean shuixianhua(int x)
{
int i=0,j=0,k=0;
i=x / 100;
j=(x % 100) /10;
k=x % 10;
if(x==i*i*i+j*j*j+k*k*k)
return true;
else
return false;
}
}
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