public class Factor{ public static void main(String arg[]){ int i=1,j=1,iR=0; int[] arr = new int[]{2,4,6,10}; for(i=0;i<arr.length;i++){ iR = doFactor(arr[i]); System.out.println(arr[i] + "的阶乘为:" + iR); } } //求阶乘 private static int doFactor(int iNum){ int iR=iNum,j=0; for(j=1;j<iNum;j++){ iR *= j; } return iR; } }