一个N位数的各位数的N次方之和等于这个数，称为armstrong数（如：153=1^3+5^3+3^3)。编一个程序，求出2，3，4位数中所有的armstrong数。-an N to the median number of Nth power equal to the sum of the number called armstrong (such as : 153 = a ^ ^ 3 5 3 3 ^ 3). Procedures for a series to get two, three