摘要：
1.求1+2+...+100public class Suanfa {public static void main(String args[]){/*方法一int a = 1;int b = 2;for(;b<=100;){a = a + b;b++;} System.out.println(a);*///方法二int sum = 0;for(int i=1;i<=100;i++){sum = sum + i;}System.out.println(sum);}}2. 数列1 1 2 3 5 8...求第二十一个的值public class Suanfa2 {public sta 阅读全文
