计算器，不能让它按我想要的打印出来

Question

这是我的作业。但是，我无法得到结果工作。我想把它打印出来：

> 2*7*6 
    2 
* 7 
---- 
    14 
* 6 
---- 
    84 

等等。无论输入多少个数字，我都希望代码能够正常工作。这是我迄今的代码;

public static int add(int a, int b) { 
    return a + b; 
} 

public static int sub(int a, int b) { 
    return a - b; 
} 

public static int multiply(int a, int b) { 
    return a * b; 
} 

public static void main(String[] args) 
{ 

    Scanner in = new Scanner(System.in); 

    System.out.print("(ex. 8*2*6): "); 
    String amount = in.nextLine(); 

    if (amount.contains("+")) { 
     String[] parts = amount.split("\\+"); 
    } else if (amount.contains("-")) { 
     String[] parts = amount.split("\\-"); 
    } else if (amount.contains("*")) { 
     String[] parts = amount.split("\\*"); 
     int[] results = new int[parts.length]; 

     // Convert from string to integer 
     for (int i = 0; i < parts.length; i++) { 
      try { 
       results[i] = Integer.parseInt(parts[i]); 
      } catch (NumberFormatException nfe) {}; 
     } 

     // Print result 
     int counter = 1; 
     for (int i = 0; i <= results.length; i++) { 
      if (i == 0) { 
      System.out.println(" " + results[i]); 
      System.out.println("* " + results[counter]); 
      System.out.println("----"); 
      int total = multiply(results[i], results[counter]); 
      System.out.println(" " + total); 
      } else if (i > 1) { 
       System.out.println("* " + results[i]); 
       System.out.println("----"); 
       System.out.println(" " + multiply(results[i], results[counter])); 
      } 
      } 

    } else { 
     System.out.println("Error"); 
    } 

我在做什么错？

Answer 1

不是c＃不是吗？我不确定我是否理解你。

在c＃中，你有没有试过类似的东西。

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 

namespace ConsoleApplication3 
{ 
    class Program 
    { 
     static void Main(string[] args) { 

      // Scanner in = new Scanner(System.in); 
      // String amount = Console.ReadLine(); 
      String amount = "2*7*6*5*3*2"; 

      if (amount.Contains('+')) { 
       String[] parts = amount.Split('+'); 

      } 
      else 
       if (amount.Contains('-')) { 
        String[] parts = amount.Split('-'); 
       } 
       else if (amount.Contains("*")) { 
        String[] parts = amount.Split('*'); 
        int[] results = new int[parts.Length]; 

        // Convert from string to integer 
        for (int i = 0; i < parts.Length; i++) { 
         try { 
          results[i] = int.Parse(parts[i]); 
         } 
         catch (FormatException nfe) { }; 
        } 

        // Print result  
        int total = results[0]; 

        for (int i = 1; i < results.Length; i++) { 

         if (i == 1) 
          Console.WriteLine(" " + results[i - 1]); 

         Console.WriteLine("* " + results[i]); 
         Console.WriteLine("----"); 

         total = multiply(results[i], total); 
         Console.WriteLine(" " + total); 
        } 

       } 
       else { 
        Console.WriteLine("Error"); 
       } 

      Console.ReadKey(); 
     } 

     public static int add(int a, int b) { 
      return a + b; 
     } 

     public static int sub(int a, int b) { 
      return a - b; 
     } 

     public static int multiply(int a, int b) { 
      return a * b; 
     } 

     public static void main(String[] args) { 


     } 
    } 

}