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bhagirath singh
input using scanner and add/sub/mul/div of a matrix
1 Answer(s)      3 years and 8 months ago
Posted in : Java Beginners


hiiii...... performe matrix add/sub/mul/div using scanner.


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March 5, 2011 at 11:09 AM


Java Matrix Calculation

import java.util.*;
class MatrixExamples{

    public static void main(String[] args){
    Scanner input = new Scanner(System.in);
    int[][] A = new int[3][3];
int[][] B = new int[3][3];
int[][] C = new int[3][3];
System.out.println("Enter elements for matrix A : ");
for (int i=0 ; i < A.length ; i++)
for  (int j=0 ; j < A[i].length ; j++){
A[i][j] = input.nextInt();
}
System.out.println("Enter elements for matrix B : ");
for (int i=0 ; i < B.length ; i++)
for  (int j=0 ; j < B[i].length ; j++){
B[i][j] = input.nextInt();
}
System.out.println("Matrix A: ");
        for (int i=0 ; i < A.length ; i++)
        {     System.out.println();
            for  (int j=0 ; j < A[i].length ; j++){
                System.out.print(A[i][j]+" ");
                  }
        }
System.out.println();
System.out.println("Matrix B: ");
        for (int i=0 ; i < B.length ; i++)
        {     System.out.println();
            for  (int j=0 ; j < B[i].length ; j++){
                System.out.print(B[i][j]+" ");
                  }
        }
System.out.println();
int menu = 0;
System.out.println();
System.out.println("1. Addition Of Matrix");
System.out.println("2. Subtraction Of Matrix");
System.out.println("3. Multiplication Of Matrix");
System.out.println("4. Division Of Matrix");
System.out.println("5. Exit");
boolean quit = false;
do{
System.out.print("Please enter your choice: ");
menu = input.nextInt();
System.out.println();

switch(menu) {
case 1:
    System.out.println("Sum of 2 matrices");
    for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
C[i][j]=A[i][j]+B[i][j];
System.out.print(C[i][j]+" ");
}
System.out.println();
}
break;
case 2:
    System.out.println("Subtraction of 2 matrices");
    for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
C[i][j]=A[i][j]-B[i][j];
System.out.print(C[i][j]+" ");
}
System.out.println();
}
break;
case 3:
System.out.println("Multiplication of 2 matrices");

for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
for(int k=0;k<3;k++){
C[i][j]+=A[i][k]*B[k][j];
}
}
}
for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
System.out.print(+C[i][j]+" ");
}
System.out.println();
} 
break;
case 4:
    System.out.println("Division of 2 matrices : ");
        for(int i = 0; i < 3; i++) {
      for(int j = 0; j < 3; j++) {
      C[i][j]=A[i][j]/B[i][j];
      System.out.print(C[i][j]+" ");
      }
      System.out.println(" ");
      }
case 5:
quit = true;
break;
default:
System.out.println("Invalid Entry!");
 }
}
while (!quit);
}
}


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