jiecheng.java

完数算法实现

public class jiecheng{
	public static void main(String args[]){
		int sum=0,i=1,a=1;
		for(i=1;i<=4;i++){
			a=a*i;
			sum=sum+a;
		}
		System.out.println("阶乘等矣:"+sum);
	}
}