Question

用java编程1!+2!+3!+4!+5!+6!+7!+8!+9!+10!

Answer 1

public class Test {

public static void main(String[] args) {
System.out.println(jiecheng(10));
}

public static int jiecheng(int m) {
if (m == 1) {return 1;}
int result = 1;
for(int i = 1; i <= m; i++) {
result *= i;
}
return result + jiecheng(m - 1);
}
}

Answer 2

int temp = 1;
int jiecheng = 0;
for (int i = 1; i <= 1; i++) {
temp *= i;
jiecheng += temp;
}
System.out.println(jiecheng);

Answer 3

package com.baidu;

public class Testjc {

/**
* @author zpf<br>
* <b>create Date:</b>Apr 15, 2010 6:55:09 PM<br>
* <b>last modify Date:</b>Apr 15, 2010 6:55:09 PM<br>
* @param args
*/

public static void main(String[] args) {
// TODO Auto-generated method stub

int[] jcarray=new int[10];
int result=0;
for(int i=1;i<11;i++){
int jc=1;
for(int j=1;j<=i;j++){
jc*=j;
jcarray[i-1]=jc;
}
}
for(int i=0;i<jcarray.length;i++){
result+=jcarray[i];
System.out.print(jcarray[i]+"\t");
}
System.out.println();
System.out.print(result);
}

}
大概就这样吧