水仙花数：N位整数，它等于各位上的数字的N次方之和，例如有一个N位数字，a1a2a3a4.....aN = a1^N +a2^N+......aN^N 算法原理： 注意：以下 sum 为各位上的数字的N次方之和 sum_a为集合a中的数的sum-Daffodils number: N-bit integer, which is equal to you the numbers on the N-th power of, for example, an N-bit digital, a1a2a

AD采样，数字测频器，直流稳压电源，液晶显示和键盘数码管显示-AD sampling, digital frequency measurement, DC power supply, LCD display and keypad LED display