第二次作業（個人項目實踐）

標籤：

1. 設計一個類（不妨叫做A ），實現對一維數組(a[100])的指定範圍內的元素相加運算。   [課堂講解過]   數組長度：100，範圍：實驗資料A列：1~100，CSV 格式則填充 前100個資料

 

package AAA; import java.util.Scanner;    public class a {      public static void main(String[]args)      {         int[] b={-2574,-4010,8243,771,2447,-5197,2556,8044,3314,3617,6065,-2817,3131,6318,2186,-113,629,-2582,-37,-1520,164,2055,-5936,5912,1717,5988,4781,5757,892,-4394,8034,2213,-1080,-2080,5364,106,2657,566,3940,-5116,4583,1806,6555,2621,-7197,528,1626,18,1049,6243,3198,4397,-1325,9087,936,-6291,662,-178,135,-3473,-2385,-165,1713,-7949,-4234,1138,2212,104,6968,-3632,3801,1137,-1296,-1215,4272,6223,-5922,-7723,7044,-2938,-8180,1356,1159,-4022,-3713,1158,-8715,-4081,-2541,-2555,-2284,461,940,6604,-3631,3802,-2037,-4354,-1213,767};  int sum=0;     Scanner sc = new Scanner(System.in) ;       System.out.println("從第m個開始:");//<=100       int start = sc.nextInt() ;        System.out.println("到第n個結束:");//<=100       int end =sc.nextInt();          System.out.println("第"+start+"個到第"+end+"個的和為：");             for(int i=start;i<=end;i++)//for語句                sum+=b[i];                                      System.out.println(b[start-1]+"+...+"+b[end-1]+"="+sum);      }}

 

　　

2. 設計一個類（不妨叫做B ），實現對二維數組(a[N][M])的指定範圍內的元素相加運算。  數組長度：（N*M 約等於200），範圍：實驗資料A、B列：1~100，CSV格式則填充前N*M個資料；

 

package AAA; import java.util.Scanner;     public class aa {        public static void main(String[]args){          int[][] b={{-2574,-4010,8243,771,2447,-5197,2556,8044,3314,3617,6065,-2817,3131,6318,2186,-113,629,-2582,-37,-1520,164,2055,-5936,5912,1717,5988,4781,5757,892,-4394,8034,2213,-1080,-2080,5364,106,2657,566,3940,-5116,4583,1806,6555,2621,-7197,528,1626,18,1049,6243,3198,4397,-1325,9087,936,-6291,662,-178,135,-3473,-2385,-165,1713,-7949,-4234,1138,2212,104,6968,-3632,3801,1137,-1296,-1215,4272,6223,-5922,-7723,7044,-2938,-8180,1356,1159,-4022,-3713,1158,-8715,-4081,-2541,-2555,-2284,461,940,6604,-3631,3802,-2037,-4354,-1213,767},{2740,-4182,-5632,-2966,-1953,567,-8570,1046,2211,1572,-2503,-1899,3183,-6187,3330,3492,-464,-2104,316,8136,470,50,466,-1424,5809,2131,6418,-3018,6002,-8379,1433,1144,2124,1624,-602,-5518,5872,870,-5175,-3961,-427,-6284,2850,481,6175,141,-766,-1897,-748,-4248,366,4823,3003,1778,3256,2182,2253,5076,5540,-2650,2451,-1875,5482,-6881,-329,-969,-8032,-2093,612,1524,-5492,5758,-7401,-5039,3241,6338,3581,4321,-1072,4942,2131,210,-7045,-7514,7450,-1142,-2666,-4485,-639,2121,-5298,-3805,-1686,-2520,-1680,2321,-4617,-1961,2076,7309}};  int sum=0;      Scanner sc = new Scanner(System.in);           System.out.println("行開始x1:");//<=2           int startX = sc.nextInt();            System.out.println("行結束x2:");           int endX =sc.nextInt();           System.out.println("列開始y1:");//<=100           int startY = sc.nextInt();            System.out.println("列結束y2：");           int endY =sc.nextInt();              for(int i=startX-1;i<=endX-1;i++)              {                for(int j=startY-1;j<=endY-1;j++)                {                 sum+=b[i][j];                }             }           System.out.println(b[startX-1][startY-1]+"+...+"+b[endX-1][endY-1]+"="+sum);          }  }

　　

3.設計一個類（不妨叫做C ），實現對三維數組(a[N][M][K])的指定範圍內的元素相加運算。  數組長度：（N*M*K 約等於300），範圍：實驗資料A、B、C列：1~100, CSV格式則填充前N*M*K個資料；

 

package AAA;  import java.util.Scanner;     public class aaa {        public static void main(String[]args)        {           int sum=0;           int[][][] c = new int[][][]           {                 {{-2574,-4010,8243,771,2447,-5197,2556,8044,3314,3617,6065,-2817,3131,6318,2186,-113,629,-2582,-37,-1520,164,2055,-5936,5912,1717,5988,4781,5757,892,-4394,8034,2213,-1080,-2080,5364,106,2657,566,3940,-5116,4583,1806,6555,2621,-7197,528,1626,18,1049,6243,3198,4397,-1325,9087,936,-6291,662,-178,135,-3473,-2385,-165,1713,-7949,-4234,1138,2212,104,6968,-3632,3801,1137,-1296,-1215,4272,6223,-5922,-7723,7044,-2938,-8180,1356,1159,-4022,-3713,1158,-8715,-4081,-2541,-2555,-2284,461,940,6604,-3631,3802,-2037,-4354,-1213,767}},                  {{2740,-4182,-5632,-2966,-1953,567,-8570,1046,2211,1572,-2503,-1899,3183,-6187,3330,3492,-464,-2104,316,8136,470,50,466,-1424,5809,2131,6418,-3018,6002,-8379,1433,1144,2124,1624,-602,-5518,5872,870,-5175,-3961,-427,-6284,2850,481,6175,141,-766,-1897,-748,-4248,366,4823,3003,1778,3256,2182,2253,5076,5540,-2650,2451,-1875,5482,-6881,-329,-969,-8032,-2093,612,1524,-5492,5758,-7401,-5039,3241,6338,3581,4321,-1072,4942,2131,210,-7045,-7514,7450,-1142,-2666,-4485,-639,2121,-5298,-3805,-1686,-2520,-1680,2321,-4617,-1961,2076,7309}},                 {{302,-7944,-6551,6648,-884,-6332,1188,-248,3902,-2171,-3782,-3510,6203,-636,-4605,4497,3187,-6278,1198,-7963,7647,-3022,-8267,7995,-1998,-4171,730,-8117,-1706,7601,-2454,-6161,-1810,243,-2841,-5377,2985,2328,177,5622,3596,3057,2830,-1151,6566,2254,6972,-3060,4063,367,84,3156,3880,-1530,5272,1385,-565,-1736,1267,-3863,-229,2072,2423,-7449,9555,2844,-1278,-3613,-919,4153,-4232,4032,-5732,199,4792,2498,-3344,-4193,2650,-579,3416,-3575,1822,-6936,-2661,-1873,414,2314,6844,7613,-7844,6680,5974,2208,-3597,6302,4396,-141,-1864,1939}}             };      Scanner sc = new Scanner(System.in) ;         System.out.println("開始x1:");//<=3         int startX = sc.nextInt() ;         System.out.println("結束x2:");         int endX =sc.nextInt();         System.out.println("開始y1:");//<=2         int startY = sc.nextInt() ;         System.out.println("結束y2:");         int endY =sc.nextInt();         System.out.println("開始z1:");//<=100         int startZ = sc.nextInt() ;         System.out.println("結束z2:");         int endZ =sc.nextInt();            for(int i=startX-1;i<=endX-1;i++)            {               for(int j=startY-1;j<=endY-1;j++)               {                 for(int k=startZ-1;k<=endZ-1;k++)                 {                   sum+=c[i][j][k];                 }               }           }           System.out.println(c[startX-1][startY-1][startZ-1]+"+...+"+c[endX-1][endY-1][endZ-1]+"="+sum);      } }

　　

個人小結：

     這次作業完成的有點遲，因為最初不懂題目的意思，後來在老師的進一步分析以及同學間的探討中，才有了思路。

這次作業中運用了Scanner類的nextInt()方法和Java中學習過的for語句，由於先前基礎沒有打好，這次作業前便去翻書查看了好久。儘管老師要求我們要從檔案中讀取資料，但詢問了周邊的同學，也沒有找到解決辦法，所以還是借鑒了張振淵同學的方法，採取了人工匯入資料。雖然之前學得並不好，但感覺每一次作業或多或少都能有點收穫，並能協助我們去溫習過去學過的知識，還是挺珍惜每次作業機會的。

 

第二次作業（個人項目實踐）