范家鸣的博客

在这里插入import java.util.Scanner; public class Demo1 { public static void main(String[] args) { Scanner input =new Scanner(System.in); int num; do { System.out.println("请你输入菱形的行数："); num =input.nextInt(); } while (num%2==0); int shang=num/2+1; int xia=nu

public class Demo1{ public static void mian (string[] args) int num=0; int sum=0; while (num<=100){ sum+=num; num+=2; } system.out.println(sum) }

public class Demo1 { public static void mian(string[] args){ int num=0; //声明赋值 int sum=0; do{ sum+=num; num+=2; }while(num<=100); system.out.printlin(sum); } }