Java学习(六)

public class MatrixAddition{
    public static void main(String args[]){
        int i,j,k;
        int a[][] = new int [3][4];
        int b[][] = {{1,5,2,8},{5,9,10,-3},{2,7,-5,-18}};
        int c[][] = new int[3][4];
        for(i = 0;i < 3;i++)
            for(j = 0;j < 4;j++)
                a[i][j] = (i + 1)*(j + 2);
        for(i = 0;i < a.length;i++)
            for(j = 0;j < a[i].length;j++)
                c[i][j]=a[i][j]+b[i][j];
    System.out.println("*******Matrix C********");
        for(i = 0;i < c.length;i++){
            for(j = 0;j < c[i].length;j++)
                System.out.print(c[i][j]+" ");
                System.out.print("\n");
        }
    }
}
         

public class ArrayDemo{
    static float AverageArray(float a[]){
        float average = 0;
        int i;
        for(i =0;i < a.length;i++){
            average = average + a[i];
        }
        return average/a.length;
    }
    public static void main(String[] args){
        float average,a[] = {1,2,3,4,5};
        average = AverageArray(a);
        System.out.println("average = "+average);
    }
}