# ম্যাট্রিক্স জাভা প্রোগ্রামটি বুঝতে পারছি না

 0 ```import java.util.Random; public class Matrix { Random random =new Random(); //return a random mXn matrix //with value 0 and 1 public int[][] random(int m,int n){ int[][] c=new int[m][n]; for(int i=0;i < m; i++){ for(int j=0; j < n; j++){ c[i][j]=random.nextInt(100); } } return c; } public int[][] multiply(int[][] a,int[][] b){ int mA=a.length; int nA=a[0].length; int mB=b.length; int nB=b[0].length; if (nA != mB) { throw new RuntimeException("Illegal matrix dimentions"); } int [][] c=new int[mA][nB]; for(int i=0;i < mA;i++){ for(int j=0; j < nB;j++){ for(int k=0;k < nA;k++){ c[i][j] += a[i][k]*b[k][j]; } } } return c; } public int[][] add(int[][] a,int[][] b){ int n=a[0].length; int m=a.length; int[][] c=new int[m][n]; for(int i=0;i < m; i++){ for(int j=0; j < n;j++){ c[i][j]=a[i][j]+b[i][j]; } } return c; } //return c=a-b public int[][] subtract(int[][] a,int[][] b) { int n=a[0].length; int m=a.length; int[][] c=new int[m][n]; for(int i=0;i < m; i++){ for(int j=0; j < n;j++){ c[i][j]=a[i][j]-b[i][j]; } } return c; } public void print(int x[][]){ for(int row=0;row < x.length; row++){ for(int col=0;col < x[row].length;col++){ System.out.println(x[row][col]+"\t"); } System.out.println(); } } public static void main(String[] args) { // TODO Auto-generated method stub Matrix matrix=new Matrix(); int[][] a=matrix.random(5, 5); int[][] b=matrix.random(5, 5); int[][] multiply=matrix.multiply(a, b); System.out.println("Result # 1 : "); matrix.print(multiply); int[][] add=matrix.add(a, b); System.out.println("\nResult # 2: "); matrix.print(add); int[][] subtract=matrix.subtract(a, b); System.out.println("\nResult # 3: "); matrix.print(subtract); } } output: Result # 1 : 13189 9159 8875 11899 3438 19819 19661 19152 16933 8416 13133 14541 15198 12551 6138 21398 21419 19912 19364 9247 20097 18790 19236 16947 6779 Result # 2: 29 133 106 60 104 174 41 125 152 88 145 57 29 112 96 168 73 173 99 98 119 142 97 158 109 Result # 3: -25 25 -32 -42 14 0 -13 29 32 58 25 -13 5 -8 34 4 -49 25 73 82 7 -30 -33 -2 77 Bazlur Rahman Rokon vai please help me!``` asked 06 Oct '17, 06:11 Mohammad Noman 21●4

 0 ``````enter code here এই প্রোগ্রামে if (nA != mB) { throw new RuntimeException("Illegal matrix dimentions"); } `````` এই কোডটির কাজ কী? answered 13 Nov '17, 09:41 Mohammad Noman 21●4
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question asked: 06 Oct '17, 06:11

question was seen: 219 times

last updated: 13 Nov '17, 09:41