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<>题目
输出所有的水仙花数，所谓的“水仙花数”指一个3位数，其各个数字的立方和等于该数本身。例如，153是水仙花数，因为153=1X1X1+5X5X5+3X3X3
<>思路
1、首先需要对所有三位数进行遍历，也就是从100~999，这需要使用到基础的循环结构，可以使用while,do-while,for循环中的任意一种
2、对一个三位数进行分解，分解成个位、十位、百位
3、对分解的个位、十位、百位进行计算，看各数字的立方和是否等于原来数据本身，如果等于，则输出该数，涉及到了单分支 if 语句
<>知识点
对一个十进制数据截取其中的某一位
截取个位，其实就是这个数除10后的余数是多少 y=x%10，即可以得到个位数据
截取十位或以上，首先要把相应的位移动到个位上，可以使用除法，例如 x/10 实际是将个位数扔掉了，比如132/10=13，这样就方便使用%10将3取出来了
个位：x%10
十位：x/10%10
百位：x/100%10
<>C语言程序
#include "stdio.h" int main() { int i,a,b,c; for(i=100; i<=999; i++) { a=i%10;
//个位 b=i/10%10; //十位 c=i/100%10; //百位 if(a*a*a+b*b*b+c*c*c==i) printf("%d ",i);
} }
<>运行结果
