输出结果与预期不一样

Question

import java.util.Scanner;
public class Exp3_6{
public static void main(String args[]){
int erqi=0;
int er;
System.out.print("请输入待检测产品数量:");
Scanner reader=new Scanner(System.in);
int count=reader.nextInt();
System.out.println("请输入产品质量信息,质量信息用换行(回车)隔开:");
Scanner reader1=new Scanner(System.in);
int[] intArray=new int[count];
for(int xin=0;xin<=count-1;xin++){
Scanner reader2=new Scanner(System.in);
System.out.print("");
int i=reader2.nextInt();
intArray[xin]=i;
if(i==1)
erqi++;
else{
erqi=erqi+0;
}
}
er=erqi/count;
System.out.print("本批受检产品合格率为:"+er);
}
}

Answer 1

public static void main(String args[]){
        int erqi=0;
        double er;
        System.out.print("请输入待检测产品数量:");
        Scanner reader=new Scanner(System.in);
        int count=reader.nextInt();
        System.out.println("请输入产品质量信息,质量信息用换行(回车)隔开:");
        Scanner reader1=new Scanner(System.in);
        int[] intArray=new int[count];
        for(int xin=0;xin<=count-1;xin++){
            Scanner reader2=new Scanner(System.in);
            System.out.print("");
            int i=reader2.nextInt();
            intArray[xin]=i;
            if(i==1) erqi++;

        }
        er=erqi*1.0/count;
        System.out.print("本批受检产品合格率为:"+er);
    }