• 《软件工程》第2次作业(1、个人项目实践)


    1. 设计一个类(不妨叫做A ),实现对一维数组的指定范围内的元素相加运算。

     1 import java.util.Scanner;     //导入scanner包,用scanner类从键盘输入数据
     2   
     3 public class yiwei {
     4     public static void main(String[]args)
     5     {
     6           int[] aa={9680,-3756,-5569,3402,4704,-6267,-2393,3191,-965,-5042,-6951,-6184,-8752,525,2144,6195,541,-3336,6904,-3130,-3261,-4770,-34,-1991,292,3703,4590,7406,2272,5190,-5336,-1521,4381,-1579,4700,269,-1059,-2249,-166,-2553,-1098,-6839,-4172,303,7838,256,-931,-5243,-51,267,-3432,2351,58,49,5963,253,3616,-7918,-4486,1256,-3305,-5528,-5891,3779,-4004,950,-8741,1864,-1158,871,-2899,5178,3183,-784,-7603,-984,-2407,-3411,-1467,4295,1271,-778,-2478,-2442,4041,-1031,1999,973,-3647,3312,-4773,2333,-719,-4644,1092,-4944,4525,3831,4107,-1816};
     7           int sum=0;
     8           Scanner a = new Scanner(System.in);            
     9           System.out.println("从第几个开始(<=100):");
    10           int begin = a.nextInt() ;
    11           System.out.println("到第几个结束(<=100):");
    12           int over =a.nextInt();
    13           System.out.println(""+begin+"个元素到第"+over+"个元素的和为:");
    14           
    15           for(int i=begin-1;i<=over-1;i++)//一定要减1,因为第一个是aa[0]
    16               sum+=aa[i];
    17               System.out.println(aa[begin-1]+"+...+"+aa[over-1]+"="+sum);
    18               
    19     }
    20 }

    注:此时按照表格内行数从176~275 行

    运行结果:

    验证:

    2. 设计一个类(不妨叫做B ),实现对二维数组的指定范围内的元素相加运算。

     1 import java.util.Scanner;
     2   public class erwei {
     3   public static void main(String[]args){
     4   int[][]b={
     5             {9680,-3756,-5569,3402,4704,-6267,-2393,3191,-965,-5042,-6951,-6184,-8752,525,2144,6195,541,-3336,6904,-3130,-3261,-4770,-34,-1991,292,3703,4590,7406,2272,5190,-5336,-1521,4381,-1579,4700,269,-1059,-2249,-166,-2553,-1098,-6839,-4172,303,7838,256,-931,-5243,-51,267,-3432,2351,58,49,5963,253,3616,-7918,-4486,1256,-3305,-5528,-5891,3779,-4004,950,-8741,1864,-1158,871,-2899,5178,3183,-784,-7603,-984,-2407,-3411,-1467,4295,1271,-778,-2478,-2442,4041,-1031,1999,973,-3647,3312,-4773,2333,-719,-4644,1092,-4944,4525,3831,4107,-1816},
     6             {9680,-3756,-5569,3402,4704,-6267,-2393,3191,-965,-5042,-6951,-6184,-8752,525,2144,6195,541,-3336,6904,-3130,-3261,-4770,-34,-1991,292,3703,4590,7406,2272,5190,-5336,-1521,4381,-1579,4700,269,-1059,-2249,-166,-2553,-1098,-6839,-4172,303,7838,256,-931,-5243,-51,267,-3432,2351,58,49,5963,253,3616,-7918,-4486,1256,-3305,-5528,-5891,3779,-4004,950,-8741,1864,-1158,871,-2899,5178,3183,-784,-7603,-984,-2407,-3411,-1467,4295,1271,-778,-2478,-2442,4041,-1031,1999,973,-3647,3312,-4773,2333,-719,-4644,1092,-4944,4525,3831,4107,-1816}
     7            };
     8   int sum=0;
     9   Scanner bb = new Scanner(System.in);
    10   System.out.println("从第几行开始:");//<=2
    11   int beginI = bb.nextInt(); 
    12  System.out.println("到第几行结束:");//<=2
    13  int overI =bb.nextInt();
    14  System.out.println("从第几列开始:");//<=100
    15  int beginJ = bb.nextInt(); 
    16  System.out.println("到第几列结束:");//<=100
    17  int overJ =bb.nextInt();
    18  System.out.println(""+beginI+"行第"+beginJ+"列到第"+overI+"行第"+overJ+"列的和为:");
    19  
    20  for(int i=beginI-1;i<=overI-1;i++)//不减1的话2会溢出
    21  {
    22      for(int j=beginJ-1;j<=overJ-1;j++)//不减1的话100会溢出
    23      {
    24      sum+=b[i][j];
    25      }
    26  }
    27  System.out.println(b[beginI-1][beginJ-1]+"+...+"+b[overI-1][overJ-1]+"="+sum);  
    28  }
    29  }

    注:此时为了节约时间是把第一列的数据用了两遍

    运行结果:

    3. 设计一个类(不妨叫做C ),实现对三维数组的指定范围内的元素相加运算。

     1 import java.util.Scanner;
     2   
     3   public class sanwei {
     4  
     5      
     6      public static void main(String[]args)
     7      {
     8          int sum=0;
     9           int[][][] cc = new int[][][]
    10              {
    11                  {{9680,-3756,-5569,3402,4704,-6267,-2393,3191,-965,-5042,-6951,-6184,-8752,525,2144,6195,541,-3336,6904,-3130,-3261,-4770,-34,-1991,292,3703,4590,7406,2272,5190,-5336,-1521,4381,-1579,4700,269,-1059,-2249,-166,-2553,-1098,-6839,-4172,303,7838,256,-931,-5243,-51,267,-3432,2351,58,49,5963,253,3616,-7918,-4486,1256,-3305,-5528,-5891,3779,-4004,950,-8741,1864,-1158,871,-2899,5178,3183,-784,-7603,-984,-2407,-3411,-1467,4295,1271,-778,-2478,-2442,4041,-1031,1999,973,-3647,3312,-4773,2333,-719,-4644,1092,-4944,4525,3831,4107,-1816},{9680,-3756,-5569,3402,4704,-6267,-2393,3191,-965,-5042,-6951,-6184,-8752,525,2144,6195,541,-3336,6904,-3130,-3261,-4770,-34,-1991,292,3703,4590,7406,2272,5190,-5336,-1521,4381,-1579,4700,269,-1059,-2249,-166,-2553,-1098,-6839,-4172,303,7838,256,-931,-5243,-51,267,-3432,2351,58,49,5963,253,3616,-7918,-4486,1256,-3305,-5528,-5891,3779,-4004,950,-8741,1864,-1158,871,-2899,5178,3183,-784,-7603,-984,-2407,-3411,-1467,4295,1271,-778,-2478,-2442,4041,-1031,1999,973,-3647,3312,-4773,2333,-719,-4644,1092,-4944,4525,3831,4107,-1816}}, 
    12                  {{9680,-3756,-5569,3402,4704,-6267,-2393,3191,-965,-5042,-6951,-6184,-8752,525,2144,6195,541,-3336,6904,-3130,-3261,-4770,-34,-1991,292,3703,4590,7406,2272,5190,-5336,-1521,4381,-1579,4700,269,-1059,-2249,-166,-2553,-1098,-6839,-4172,303,7838,256,-931,-5243,-51,267,-3432,2351,58,49,5963,253,3616,-7918,-4486,1256,-3305,-5528,-5891,3779,-4004,950,-8741,1864,-1158,871,-2899,5178,3183,-784,-7603,-984,-2407,-3411,-1467,4295,1271,-778,-2478,-2442,4041,-1031,1999,973,-3647,3312,-4773,2333,-719,-4644,1092,-4944,4525,3831,4107,-1816},{9680,-3756,-5569,3402,4704,-6267,-2393,3191,-965,-5042,-6951,-6184,-8752,525,2144,6195,541,-3336,6904,-3130,-3261,-4770,-34,-1991,292,3703,4590,7406,2272,5190,-5336,-1521,4381,-1579,4700,269,-1059,-2249,-166,-2553,-1098,-6839,-4172,303,7838,256,-931,-5243,-51,267,-3432,2351,58,49,5963,253,3616,-7918,-4486,1256,-3305,-5528,-5891,3779,-4004,950,-8741,1864,-1158,871,-2899,5178,3183,-784,-7603,-984,-2407,-3411,-1467,4295,1271,-778,-2478,-2442,4041,-1031,1999,973,-3647,3312,-4773,2333,-719,-4644,1092,-4944,4525,3831,4107,-1816}},
    13                  {{9680,-3756,-5569,3402,4704,-6267,-2393,3191,-965,-5042,-6951,-6184,-8752,525,2144,6195,541,-3336,6904,-3130,-3261,-4770,-34,-1991,292,3703,4590,7406,2272,5190,-5336,-1521,4381,-1579,4700,269,-1059,-2249,-166,-2553,-1098,-6839,-4172,303,7838,256,-931,-5243,-51,267,-3432,2351,58,49,5963,253,3616,-7918,-4486,1256,-3305,-5528,-5891,3779,-4004,950,-8741,1864,-1158,871,-2899,5178,3183,-784,-7603,-984,-2407,-3411,-1467,4295,1271,-778,-2478,-2442,4041,-1031,1999,973,-3647,3312,-4773,2333,-719,-4644,1092,-4944,4525,3831,4107,-1816},{9680,-3756,-5569,3402,4704,-6267,-2393,3191,-965,-5042,-6951,-6184,-8752,525,2144,6195,541,-3336,6904,-3130,-3261,-4770,-34,-1991,292,3703,4590,7406,2272,5190,-5336,-1521,4381,-1579,4700,269,-1059,-2249,-166,-2553,-1098,-6839,-4172,303,7838,256,-931,-5243,-51,267,-3432,2351,58,49,5963,253,3616,-7918,-4486,1256,-3305,-5528,-5891,3779,-4004,950,-8741,1864,-1158,871,-2899,5178,3183,-784,-7603,-984,-2407,-3411,-1467,4295,1271,-778,-2478,-2442,4041,-1031,1999,973,-3647,3312,-4773,2333,-719,-4644,1092,-4944,4525,3831,4107,-1816}}
    14              };
    15          Scanner c = new Scanner(System.in) ;
    16          System.out.println("请输入beginX(<=3):");
    17          int beginX = c.nextInt() ; 
    18          System.out.println("请输入overX(<=3):");
    19          int overX =c.nextInt();
    20          System.out.println("请输入beginY(<=2):");
    21          int beginY = c.nextInt() ; 
    22          System.out.println("请输入overY(<=2):");
    23          int overY =c.nextInt();
    24          System.out.println("请输入beginZ(<=100):");
    25          int beginZ = c.nextInt() ; 
    26          System.out.println("请输入overZ(<=100):");
    27          int overZ =c.nextInt();
    28          System.out.println("从第"+beginX+"行第"+beginY+"列第"+beginZ+"个到第"+overX+"行第"+overY+"列第"+overZ+"个的和为:");
    29          for(int i=beginX-1;i<=overX-1;i++)
    30           {
    31               for(int j=beginY-1;j<=overY-1;j++)
    32              {
    33                   for(int k=beginZ-1;k<=overZ-1;k++)//类比二维数组
    34                   {
    35                       sum+=cc[i][j][k];         
    36              
    37                   }
    38              }
    39               
    40           }
    41           System.out.println(cc[beginX-1][beginY-1][beginZ-1]+"+...+"+cc[overX-1][overY-1][overZ-1]+"="+sum);
    42      }
    43  }
    44  

    运行结果:

          因为这学期电脑重装了系统所以一直没有装编译软件、一直到周末才开始准备这次的编程、所以说基本是为了赶作业而边编写的程序,还有非常多需要改进的地方,希望老师加以指点。

           这次编程遇到的编译问题有很多,比如第m行第n列在写循环的时候要写第m-1行第n-1列,最后的结果才对,一开始忘记了,后来用短一点的数据自己算了一下才发现的,因为每行每列开头的标识符是0而不是1,很容易忘记。

    错误:

          还有很多因为不小心而忽略的细节,自己以后也要加以改正。

          这次完成作业前提是看了林杰的编程后有所启发、后期在编译过程中有很多地方,很多地方都是在和曹磊同学一起讨论、细节上共同探讨和完善然后得出结果。在此表示感谢!

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  • 原文地址:https://www.cnblogs.com/wangwei0917/p/4824915.html
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