/*【程序8】
题目:求s=a+aa+aaa+aaaa+aa...a的值,其中a是一个数字。例如2+22+222+2222+22222(此时共有5个数相加),几个数相加有键盘控制。 */
package test;
import java.util.Scanner;
public class test {
public static int sum(int number, int input) {
int result = 0;
int tem = number;
for(int i = 0; i < input; i++)
{
for(int j = i; j > 0; j--)
{
tem = tem + (int) Math.pow(10, j)*number;
}
result += tem;
tem = number;
}
return result;
}
public static void main(String[] args) {
long a = System.currentTimeMillis();
int number = 2;
Scanner s = new Scanner(System.in);
System.out.println("Please input the number count:");
int input = s.nextInt();
int sum = sum(number, input);
System.out.println("sum is "+sum);
System.out.println(System.currentTimeMillis() - a);
}
}
java每日小算法(8),布布扣,bubuko.com
java每日小算法(8)