Scanner input = new Scanner(System.in);

? ? System.out.println("請輸入數(shù)字：");

? ? int sum=0;

? ? int i=0; int j=0;

? ? for(;i>=0;i++) {

? ? int num=input.nextInt();

? ? System.out.print(num+" "+i);

? ? ? ? if(num==0) {break;}

? ? if(num<0) {j++;}

? ? sum+=num;

? ? }

? ? double avg =sum/i;

? ? System.out.println("整數(shù)個數(shù)為："+i+"\t"+"負數(shù)個數(shù)為"+j+"\t"+"總和為："+sum+"\t"+"平均值為："+avg);

package?com.imooc;

import?java.util.Scanner;

public?class?Test?{
	
	public?static?void?main(String[]?args)?{
		function();
	}
	
	/**
	?*?函數(shù)
	?*/
	public?static?void?function()?{
		Scanner?input?=?new?Scanner(System.in);
		Integer?positiveNums?=?0;//?正數(shù)個數(shù)
		Integer?negativeNums?=?0;//?負數(shù)個數(shù)
		Integer?num;//?輸入的整數(shù)
		Double?sum?=?0.0;//?和
		Double?avg?=?0.0;//?平均值
		
		int?count?=?0;//?計數(shù)器
		while?(true)?{
			count++;
			System.out.print("請輸入第"?+?count?+?"個數(shù)：");
			num?=?input.nextInt();
			if(num?==?0){
				break;
			}else?if?(num>0){//?正數(shù)
				positiveNums++;
			}else{//?負數(shù)
				negativeNums++;
			}
			
			//?求和
			sum?+=?num;
		}
		
		//?平均值
		avg?=?sum?/?(positiveNums?+?negativeNums);
		
		System.out.println("正數(shù)的個數(shù)為："?+?positiveNums);
		System.out.println("負數(shù)的個數(shù)為："?+?negativeNums);
		System.out.println("總和為："?+?sum);
		System.out.println("平均值為："?+?avg);
	}
}