package matrix;

public class Matrix {

    private int n;
    private int m;
    private int data[][];
    private String name;

    public Matrix(String name,int n,int m){
        this.n=n;
        this.m=m;
        this.data=new int[n][m];
        this.name=name;
    }

    public void add(int x,int y,int value){
        this.data[x][y]=value;
    }

    public Matrix plus(Matrix b){
        Matrix c = new Matrix("c",this.n,this.m);
        if(this.n==b.n && this.m==b.m){
            for (int i=0;i<this.n;i++){
                for (int j=0;j<this.m;j++){
                    c.data[i][j]=this.data[i][j]+b.data[i][j];
                }
            }
        }
        return c;
    }

    public Matrix multiply(Matrix b){
        int count = 0;
        Matrix c = new Matrix("c",b.n,this.m);
        if(this.n==b.m){
            for(int i=0;i<this.m;i++){
                for(int j=0;j<b.n;j++){
                    for(int k=0;k<this.n;k++) {
                        count += this.data[k][i] * b.data[j][k];
                    }
                    c.data[j][i] = count;
                    count=0;
                }
            }
        }
        return c;
    }

    public Matrix determinant(){}

    public String toString() {
        String out = "";
        for (int i=0;i<this.m;i++){
            out += "\n";
            for (int j=0;j<this.n;j++){
                out += " " + this.data[j][i];
            }
        }
        return "Matrix: " + this.name + " have " + out;
    }
}



package matrix;

public class Main {

    public static void main(String[] args) {
	    Matrix new1 = new Matrix("1",3,2);
	    Matrix new2 = new Matrix("2",4,3);
	    Matrix new3 = new Matrix("3",3,2);

	    new1.add(0,0,2);
        new1.add(1,0,1);
        new1.add(2,0,1);
        new1.add(0,1,5);
        new1.add(1,1,0);
        new1.add(2,1,3);
        System.out.println(new1.toString());

        new2.add(0,0,1);
        new2.add(1,0,12);
        new2.add(2,0,4);
        new2.add(3,0,8);
        new2.add(0,1,1);
        new2.add(1,1,-3);
        new2.add(2,1,0);
        new2.add(3,1,4);
        new2.add(0,2,2);
        new2.add(1,2,1);
        new2.add(2,2,8);
        new2.add(3,2,-5);
        System.out.println(new2.toString());

        new3.add(0,0,2);
        new3.add(1,0,1);
        new3.add(2,0,1);
        new3.add(0,1,5);
        new3.add(1,1,0);
        new3.add(2,1,3);
        System.out.println(new3.toString());

        System.out.println((new1.plus(new3)).toString());
        System.out.println((new1.multiply(new2)).toString());
    }
}