当我输入任意数量的数字时,它会给我错误的平均数,我不知道为什么我尝试了许多方法,但平均数仍然无法正常工作 我做错了什么才能得到错误的结果? 任何建议。
import java.util.Scanner;
public class Assignment_Help2 {
public static void main(String[] args){
Scanner keyboard = new Scanner (System.in);
String[] department = new String[5];
int[] employeesno = new int[5];
String [] address = new String[5];
int index;
index = 0;
int totalentered = 0;
String temp;
// One loop to enter all information
//INPUT LOOP
for (index = 0; index < 5; index++)
{
System.out.print("Enter a department or stop ..: ");
department[index] = keyboard.nextLine();
if (department[index].equals("stop"))
{
break;
}
System.out.print("employees_no: ");
temp = keyboard.nextLine();
// convert string to a number & then store it as integer in the array
employeesno[index] = Integer.valueOf(temp);
System.out.print("Enter address: ");
address[index] = keyboard.nextLine();
totalentered++;
} //END OF FOR LOOP
System.out.println("==================================");
System.out.println(String.format("%-20s", "department")+
String.format("%-18s", "no_employees")+
String.format("%-20s", "Address"));
// Another separate loop to display the information stored in arrays
//OUTPUT LOOP
for (index = 0; index < totalentered; index++)
{
System.out.println(String.format("%-20s", department[index]) +
String.format("%-18d", employeesno[index])+
String.format("%-20s", address[index]));
}
int sum1=0;
double average;
for(int l=0; l <employeesno.length ; l++)
{
sum1 += employeesno[l];
} average= sum1/employeesno.length;
System.out.println("aver= "+average);
keyboard.close();
}
}
答案 0 :(得分:1)
sum1
是int
; employeesno.length
是int
,因此sum1 / employeesno.length
是通过整数除法计算的。写
average = ((double) sum1) / employeesno.length`;
而不是在double
s中进行分割