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Merge pull request #113 from hansholani/hansholani-newJAVAprog
Menu based java program for matrices
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,184 @@ | ||
| import java.util.Scanner; | ||
| public class Main { | ||
| public static void main(String[] args) { | ||
| Scanner sc=new Scanner(System.in); | ||
| System.out.println("1. Add matrices\n" + "2. Multiply matrix by a constant\n" + "3. Multiply matrices\n" +"4. Transpose matrix\n"+ "0. Exit"); | ||
| while(true) | ||
| { | ||
| switch(sc.nextInt()) | ||
| { | ||
| case 1: addition(); | ||
| break; | ||
| case 2: multiplyConstant(); | ||
| break; | ||
| case 3: multiplyMatrix(); | ||
| break; | ||
| case 4: transposeMatrix(); | ||
| break; | ||
| case 0:return; | ||
| } | ||
| } | ||
| } | ||
| public static void addition() | ||
| { | ||
| Scanner sc=new Scanner(System.in); | ||
| System.out.println("Enter size of first matrix:"); | ||
| int n1=sc.nextInt(); | ||
| int m1=sc.nextInt(); | ||
| double[][] one=new double[n1][m1]; | ||
| int i,j; | ||
| System.out.println("Enter first matrix:"); | ||
| for( i=0;i<n1;i++) | ||
| for( j=0;j<m1;j++) | ||
| one[i][j]=sc.nextDouble(); | ||
| System.out.println("Enter size of second matrix:"); | ||
| int n2=sc.nextInt(); | ||
| int m2=sc.nextInt(); | ||
| System.out.println("Enter second matrix:"); | ||
| double[][] two=new double[n2][m2]; | ||
| double[][] sum=new double[n2][m2]; | ||
| for(i=0;i<n2;i++) { | ||
| for (j = 0; j < m2; j++) { | ||
| two[i][j] = sc.nextDouble(); | ||
| sum[i][j] = one[i][j] + two[i][j]; | ||
| } | ||
| } | ||
| if(n1!=n2||m1!=m2) | ||
| { | ||
| System.out.println("ERROR"); | ||
| return; | ||
| } | ||
| System.out.println("The result is:"); | ||
| for( i=0;i<n1;i++) { | ||
| for( j=0;j<m1;j++) { | ||
| System.out.print(sum[i][j]+" "); | ||
| } | ||
| System.out.println(); | ||
| } | ||
| } | ||
| public static void multiplyConstant() | ||
| { | ||
| Scanner sc=new Scanner(System.in); | ||
| System.out.println("Enter size of matrix:"); | ||
| int n1=sc.nextInt(); | ||
| int m1=sc.nextInt(); | ||
| double[][] one=new double[n1][m1]; | ||
| int i,j; | ||
| System.out.println("Enter matrix:"); | ||
| for( i=0;i<n1;i++) | ||
| for( j=0;j<m1;j++) | ||
| one[i][j]=sc.nextDouble(); | ||
| System.out.println("Enter constant:"); | ||
| double multi=sc.nextInt()*1.0; | ||
| System.out.println("The result is:"); | ||
| for( i=0;i<n1;i++) { | ||
| for (j = 0; j < m1; j++) | ||
| System.out.print(one[i][j] * multi+" "); | ||
| System.out.println(); | ||
| } | ||
| } | ||
| public static void multiplyMatrix() | ||
| { | ||
| Scanner sc=new Scanner(System.in); | ||
| System.out.println("Enter size of matrix:"); | ||
| int n1=sc.nextInt(); | ||
| int m1=sc.nextInt(); | ||
| double[][] one=new double[n1][m1]; | ||
| int i,j,k; | ||
| System.out.println("Enter matrix:"); | ||
| for( i=0;i<n1;i++) | ||
| for( j=0;j<m1;j++) | ||
| one[i][j]=sc.nextDouble(); | ||
| System.out.println("Enter size of second matrix"); | ||
| int n2=sc.nextInt(); | ||
| int m2=sc.nextInt(); | ||
| double[][] two=new double[n2][m2]; | ||
| System.out.println("Enter matrix:"); | ||
| for( i=0;i<n2;i++) | ||
| for( j=0;j<m2;j++) | ||
| two[i][j]=sc.nextDouble(); | ||
| if(m1!=n2) | ||
| { | ||
| System.out.println("ERROR"); | ||
| return; | ||
| } | ||
| System.out.println("The result is:"); | ||
| double[][] result=new double[n1][m2]; | ||
| for(i=0;i<n1;i++) | ||
| { | ||
| for(j=0;j<m2;j++) | ||
| { | ||
| for(k=0;k<n2;k++) | ||
| result[i][j]+=(one[i][k]*two[k][j]); | ||
| } | ||
| } | ||
| for(i=0;i<n1;i++) | ||
| { | ||
| for(j=0;j<m2;j++) | ||
| System.out.print(result[i][j]+" "); | ||
| System.out.println(); | ||
| } | ||
| } | ||
| public static void transposeMatrix() { | ||
| System.out.println("1. Main diagonal\n" + "2. Side diagonal\n" + "3. Vertical line\n" + "4. Horizontal line"); | ||
| Scanner sc=new Scanner(System.in); | ||
| int x = sc.nextInt(); | ||
| System.out.println("Enter matrix size:"); | ||
| int row=sc.nextInt(); | ||
| int col=sc.nextInt(); | ||
| System.out.println("Enter matrix:"); | ||
| int i,j; | ||
| double[][] arr=new double[row][col]; | ||
| for(i=0;i<row;i++) | ||
| for(j=0;j<col;j++) | ||
| arr[i][j]=sc.nextDouble(); | ||
| System.out.println("The result is:"); | ||
| switch (x) | ||
| { | ||
| case 1: mainD(arr,row,col); | ||
| break; | ||
| case 2: sideD(arr,row,col); | ||
| break; | ||
| case 3: vertD(arr,row,col); | ||
| break; | ||
| case 4: horiD(arr,row,col); | ||
| } | ||
| } | ||
| public static void mainD(double[][] arr,int row,int col) { | ||
| int i, j; | ||
| for (i = 0; i < row; i++) { | ||
| for (j = 0; j < col;j++) | ||
| System.out.print(arr[j][i]+" "); | ||
| System.out.println(); | ||
| } | ||
| } | ||
| public static void sideD(double[][] arr,int row,int col) { | ||
| int i,j; | ||
| for(i=row-1;i>-1;i--) | ||
| { | ||
| for(j=col-1;j>-1;j--) | ||
| System.out.print(arr[j][i]+" "); | ||
| System.out.println(); | ||
| } | ||
| } | ||
| public static void vertD(double[][] arr,int row,int col) | ||
| { | ||
| int i,j; | ||
| for(i=0;i<row;i++) | ||
| { | ||
| for(j=col-1;j>-1;j--) | ||
| System.out.print(arr[i][j]+" "); | ||
| System.out.println(); | ||
| } | ||
| } | ||
| public static void horiD(double[][] arr,int row,int col) | ||
| { | ||
| int i,j; | ||
| for(i=row-1;i>-1;i--) | ||
| { | ||
| for(j=0;j<col;j++) | ||
| System.out.print(arr[i][j]+" "); | ||
| System.out.println(); | ||
| } | ||
| } | ||
| } |