import java.util.*; /** Lab 3, Assignment 2, test-like main class that asks for a size and prints the matrix*/ public class ass2{ public static void main(String [] args){ int degree; Scanner s = new Scanner(System.in); System.out.println("How large?"); degree = s.nextInt(); Matrix m = new Matrix(degree); m.createArray(); m.printMatrix(); } } /** Creates/outputs a pretty matrix for Lab3, Assignment 2 */ class Matrix{ private int degree; /** Creates a new matrix for Lab 3, Assignment 2 @param degree the degree of the matrix (N X N) */ public Matrix(int degree){ if(degree<=0){ throw new IllegalArgumentException("Degree must be a positive integer"); } else{ this.degree=degree; } } /** Populates the matrix with the correct values @return int returns the matrix as a two-dimensional int */ public int[][] createArray(){ int [][] matrix = new int[degree][degree]; //first init row 0 to 0 for(int i=0;i<=degree;i++){ matrix [0][i]=0; } //then set col 0 to 1 for(int j=0;j<=degree;j++){ matrix[j][0]=1; } //then do the rest of the calcs and fill in the matrix for(int j=1;j<=degree;j++){ //do row for(int i=1;i<=degree;i++){ //do element matrix[i][j]=matrix[i-1][j-1]+matrix[i-1][j]; } } return matrix[][]; } /** Redfines the degree of the matrix @param int the new degree of the matrix (N X N) */ public void setDegree(int degree){ if(degree<=0){ throw new IllegalArgumentException("Degree must be a positive integer"); } else{ this.degree=degree; } } /** Prints the matrix to the terminal */ public void printMatrix(){ for(int j=1;j<=degree;j++){ //do row for(int i=1;i<=degree;i++){ //do element if(matrix[i][j]==0){ System.out.print(" "); } else{ System.out.print(matrix[i][j]+" "); } } } } }