赋值是编写一个名为fractionSum的方法,它接受一个整数参数n,并返回序列前n个项之和的double:1 +(1/2)+(1/3)+(1 / 4)+(1/5)+ ... +(1 / n)您可以假设参数n是非负的。
import java.util.Scanner;
public class Fraction {
public static void main(String[] args) {
Scanner console = new Scanner(System.in);
System.out.println("Enter an integer");
int a = console.nextInt();
fractionSum(a);
}
public static void fractionSum (int a) {
for(int i = 1; i<=a; i++) {
double sum = (1/i);
System.out.println(sum);
}
}
}
它现在所做的只是计算实际值
如何打印出“1 + 1/2 + 1/3 + 1/4 + ... + 1 / n”
答案 0 :(得分:0)
public static void fractionSum (int a) {
System.out.print("1");
double sum = 1;
for(int i = 1; i<=a; i++) {
System.out.print(" + 1/" + i);
sum += (1/(double)i);
}
System.out.print("/n" + sum);
}
答案 1 :(得分:0)
经过测试并且有效:
public static void fractionSum (int a)
{
for (int i = 1; i <= a; i++)
{
if (i != 1)
System.out.print(" + 1/" + i);
else
System.out.print("1");
}
}