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WINSEM2020-21_STS3105_SS_VL2020210500169_Reference_Material_I_17-Feb-2021_L8-2D_Program_1.1.pptx
1.
2.
Programming
3.
Sample Input: Sample
Output: 3 8 8 11 Question 1 Write a Java code to add the given two matrices. row = 2 column = 2 m1[][] 1 3 7 8 m2[][] 2 5 1 3
4.
import java.util.Scanner; public class
Main{ public static void main(String args[]) { Scanner sc = new Scanner(System.in); int row = sc.nextInt(); int column = sc.nextInt(); int m1[][] = new int[row][column]; for(int i = 0; i < row; i++){ for(int j = 0; j < column; j++){ m1[i][j] = sc.nextInt(); } } int m2[][] = new int[row][column]; for(int i = 0; i < row; i++){ for(int j = 0; j < column; j++){ m2[i][j] = sc.nextInt(); } } int sum[][] = new int[row][column]; addition(m1, m2, sum); } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
5.
public static void
addition(int m1[][], int m2[][], int sum[][]) { for(int i = 0; i <= sum.length - 1; i++) { for(int j = 0; j <= sum[i].length - 1; j++) { sum[i][j] = m1[i][j] + m2[i][j]; } } for(int i = 0; i <= sum.length - 1; i++) { for(int j = 0; j <= sum[i].length - 1; j++) { System.out.print(sum[i][j] + " "); } System.out.println(); } } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
6.
Question 2 Write a
Java code to find the transpose of a given matrix. Sample Input: r = 2 c = 3 matrix[][] 1 3 7 5 4 9 Sample Output: 1 5 3 4 7 9
7.
import java.util.Scanner; class Main{ public
static void main(String args[]){ Scanner in = new Scanner(System.in); int r = in.nextInt(); int c = in.nextInt(); int matrix[][] = new int[r][c]; for(int i = 0; i < r; i++) { for(int j = 0; j < c; j++) { matrix[i][j] = in.nextInt(); } } int transpose[][] = new int[c][r]; for(int i = 0; i <= r-1; i++) { for(int j = 0; j <= c-1; j++) { transpose[j][i] = matrix[i][j]; } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
8.
for(int i =
0; i <= c-1; i++) { for(int j = 0; j <= r-1; j++) { System.out.print(transpose[i][j] + " "); } System.out.println(); } } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
9.
Sample Input: Sample
Output: 5 14 22 59 Question 3 r1 = 2, c1 = 2 a[][] 1 3 7 8 r2 = 2, c2 = 2 b[][] 2 5 1 3 Write a Java code to multiply two matrices.
10.
import java.util.Scanner; public class
Main{ public static void main(String args[]){ Scanner in = new Scanner(System.in); int r1 = in.nextInt(); int c1 = in.nextInt(); int a[][] = new int[r1][c1]; for(int i = 0; i < r1; i++){ for(int j = 0; j < c1; j++){ a[i][j] = in.nextInt(); } } int r2 = in.nextInt(); int c2 = in.nextInt(); int b[][] = new int[r2][c2]; for(int i = 0; i < r2; i++){ for(int j = 0; j < c2; j++){ b[i][j] = in.nextInt(); } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
11.
if(c1 != r2){ System.out.print("Invalid
Input"); return; } int result[][] = new int[r1][c2]; multiplication(a, b, result); for(int i = 0; i < r1; i++){ for(int j = 0; j < c2; j++){ System.out.print(result[i][j] + " "); } System.out.println(); } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
12.
public static void
multiplication(int a[][], int b[][], int result[][]) { for(int i = 0; i < a.length; i++) { for(int j = 0; j < b[i].length; j++) { for(int k = 0; k < a[i].length; k++) { result[i][j] = result[i][j] + a[i][k] * b[k][j]; } } } } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
13.
Sample Input: Sample
Output: Question 4 3 America Java Alpha Write a Java code to print the words which starts with a vowel. America Alpha
14.
import java.util.Scanner; public class
Main { public static void main(String args[]) { Scanner sc = new Scanner(System.in); int col_size = sc.nextInt(); String[][] str = new String[1][col_size]; for(int col_idx = 0; col_idx < col_size; col_idx++) { str[0][col_idx] = sc.next(); } for(int col_idx = 0; col_idx < col_size; col_idx++) { char c = str[0][col_idx].charAt(0); if(c=='a' || c=='A' || c=='e' || c=='E' || c=='i' || c=='I' || c=='o' || c=='O' || c=='u' || c=='U') System.out.println(str[0][col_idx]); } } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
15.
THANK YOU
Notas do Editor
1st slide (Mandatory)
Input: r1 = 2, c1 = 2 a[][] 8 9 4 5 r2 =1, c2 =3 b[][] 1 2 3 Output: Invalid Input Description: As per matrix multiplication rule c1 should be equal to r2.
Thank you slide
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