Armstrong numbers are numbers that are equal to the sum of their dig-its raised to power of the number of digits in them. The number 153, for example, equals 1^3 + 5^3+3^3 . Thus it is an Armstrong number. Write a program to display all three-digit Armstrong numbers.
(3.36) 阿姆斯壯數是一個 n 位數，其各位數字的 n 次方和等於該數本身。例 如 153 為一阿姆斯壯數(1^3 + 5^3 + 3^3 = 153)。請撰寫一個程式來顯示所有三位 阿姆斯壯數。