如何輸出循環代碼運行的迭代

我有一個關於循環的問題。我正在創建一個計算資產折舊的程序（它是未知的），我正在循環它以便運行4次。整個代碼看起來像這樣如何輸出循環代碼運行的迭代

import java.io.*; 
import java.util.*; 

class Program108b{ 

    public static void main(String[] args){ 
     int [] numbers = {1, 2, 3, 4}; 
     for(int x: numbers){ 
      Scanner kb = new Scanner(System.in); 

      System.out.print(" Enter price "); 
      double price = kb.nextDouble(); 

      System.out.print("Enter salvage value "); 
      double salValue = kb.nextDouble(); 
      System.out.print("Enter estimated life in years "); 
      int years = kb.nextInt(); 
      double anws = ((price- salValue)/years); 
      System.out.print("Here is the depreciated value: " + (Math.round((anws)*100)/100.0)); 
     } 
    } 
}

我試圖使它說「跑＃1」，然後在「運行＃2」，然後在「運行＃3」，然後在「運行＃4」在頂部的代碼發生某些運行時。所以，現在的產量是

Enter price 2500 
Enter salvage value 350 
Enter estimated life in years 23 
Here is the depreciated value: 93.48 Enter price 23 
Enter salvage value 
32 
Enter estimated life in years 3 
Here is the depreciated value: -3.0 Enter price 2 
Enter salvage value 32 
Enter estimated life in years 3 
Here is the depreciated value: -10.0 Enter price 23 
Enter salvage value 2 
Enter estimated life in years 3 
Here is the depreciated value: 7.0

（輸入是完全隨機的，我只是想顯示輸出是什麼）我想使輸出看起來就像這樣：

run #1  
Enter price 2500 
Enter salvage value 350 
Enter estimated life in years 23 
Here is the depreciated value: 93.48 
run #2 
Enter price 23 
Enter salvage value 
32 
Enter estimated life in years 3 
Here is the depreciated value: -3.0 
run #3 
Enter price 2 
Enter salvage value 32 
Enter estimated life in years 3 
Here is the depreciated value: -10.0 
run #4 
Enter price 23 
Enter salvage value 2 
Enter estimated life in years 3 
Here is the depreciated value: 7.0

所以我問題是 - 我如何讓它說「運行#_」，並讓它每個循環更改爲「運行＃1」，「運行＃2」等，直到第四次運行？另外，如何從新行開始新運行（此代碼中的「輸入價格」部分）？

來源

2015-09-29 Will P.

不會添加一個新行。 System.out.println的確如此。或者您也可以在打印字符串中添加「\ n」以手動添加新行。這應該可以幫助你清理乾淨。 – ergonaut

只需在循環

for (int x: numbers) { 
    System.out.println("run #" + x); 
    // Rest of code 
}

來源

2015-09-29 13:42:28

謝謝。但是我將如何在新行上啓動該程序？ –

的開頭加上System.out.println試試這個 -

import java.io.*; 
import java.util.*; 
class Program108b { 
    public static void main(String[] args) { 
    int [] numbers = {1, 2, 3, 4}; 
    for(int x: numbers){ 
     System.out.println("run #" + x); /// Add this 
     Scanner kb = new Scanner(System.in); 

     System.out.print(" Enter price "); 
     double price = kb.nextDouble(); 

     System.out.print("Enter salvage value "); 
     double salValue = kb.nextDouble(); 

     System.out.print("Enter estimated life in years "); 
     int years = kb.nextInt(); 

     double anws = ((price- salValue)/years); 
     System.out.print("Here is the depreciated value: " + (Math.round((anws)*100)/100.0)); 
    } 
    } 
}

來源

2015-09-29 13:43:23

import java.io.*; 
import java.util.*; 

class Program108b{ 

    public static void main(String[] args){ 
     int [] numbers = {1, 2, 3, 4}; 
     for(int x: numbers){ 
       System.out.print("run #_" + x); 
      Scanner kb = new Scanner(System.in); 

      System.out.print(" Enter price "); 
      double price = kb.nextDouble(); 

      System.out.print("Enter salvage value "); 
      double salValue = kb.nextDouble(); 
      System.out.print("Enter estimated life in years "); 
      int years = kb.nextInt(); 
      double anws = ((price- salValue)/years); 
      System.out.print("Here is the depreciated value: " + (Math.round((anws)*100)/100.0)); 
     } 
    } 
} 

or create a variable and add 1 to it on every iteration 

import java.io.*; 
import java.util.*; 

class Test1{ 

    public static void main(String[] args){ 
     int [] numbers = {1, 2, 3, 4}; 
     int iteration = 0; 
     for(int x: numbers){ 
      System.out.println("run #"+ ++iteration); 
      Scanner kb = new Scanner(System.in); 

      System.out.print(" Enter price "); 
      double price = kb.nextDouble(); 

      System.out.print("Enter salvage value "); 
      double salValue = kb.nextDouble(); 
      System.out.print("Enter estimated life in years "); 
      int years = kb.nextInt(); 
      double anws = ((price- salValue)/years); 
      System.out.print("Here is the depreciated value: " + (Math.round((anws)*100)/100.0)); 
     } 
    } 
}

是System.out.print

來源

2015-09-29 14:51:12 Gaurav

如何輸出循環代碼運行的迭代

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