For cycle: daffodil case

Daffodils case ：

demand ： Output all... In the console “ Narcissistic number

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Problem description

What is? “ Narcissistic number ”？

The Narcissus count is a three digit number
The number of daffodils 、 ten 、 The sum of the hundreds of digit cubes is equal to the original number
Such as 123 ：13+23+33=1+8+27=36±123 Not Narcissus
Such as 371 ：33+73+13=27+343+1=371=371 It's Narcissus

analysis （ use 371 Example ）
How to find three digit numbers ：

371 ：1 It's the original number pair 10 The result of the remainder operation 371%10=1

How to find a three digit hundred digit number ：

371 ：3 Is the original number divided by 100 Result （ to be divisible by ）371/100=3

How to find three digit ten digit numbers ：

371 ：371 By dividing by 10, Can be 7 Move to position （ Integers ） 371/10=37
37 Through to 10 The value of the last digit can be obtained by performing the remainder operation 7 37%10=7
summary ：371/ 10% 10 = 7

reflection ： How to find the value in the specified bit of any number
First use the integer division operation to move the required number to one digit , Then use the remainder operation to get the value on the last bit 123456789, Divide first 10000 obtain 12345, Right again 10 Get surplus 5

Code ：

public class forTest03 {
    
    public static void main(String[] args) {
    
        // Output the number of all daffodils ： Traverse all three digits 
        for (int i =100;i<1000;i++){
    
            // Get the value on each of the three digits before calculating 
            int ge = i%10;
            int shi = i/10%10;
            int bai = i/10/10%10;

            // The judgment condition is to take the value on each of the three digits , After calculating the cube sum, compare it with the original number to see if it is equal 
            if (ge*ge*ge + shi*shi*shi +bai*bai*bai ==i){
    
                // The number that meets the conditions is daffodil 
                System.out.println(i);
            }
        }
    }
}

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Comprehensive analysis of ：

1. First establish a cycle
2. Take out the tens and hundreds of the three digits
3. Calculate whether the conditions are met , Output when conditions are met