Call main function in main function

Call main function in main function

#include "stdio.h"
#include "conio.h"
void display();
void  main()
{
 printf("NOMAN");
 display();
 getch();
 
}
void display()
{
 printf("Rehan");
 main();
}

To show multiple-inheritence

/*To show multiple-inheritence*/

import java.lang.*;
class A
{
        A()
        {
        }
        void display()
        {
        System.out.println("class A");
        }
}
class B extends A
{
        B()
        {
        }
        void display1()
        {
        display();
        System.out.println("class B");
        }
}
class C extends B
{
        C()
        {
        }
        void display2()
        {
        display1();
        System.out.println("class C");
        }
}
class multi_inheritance
{
        public static void main(String arg[])
        {
        C c1=new C();
        c1.display2();
        }
}

WAP to find out matrix multipl

/*To find out matrix multipl*/

import java.lang.*;
class Matrix
{
        int l[][],m[][],n[][];
        Matrix()
        {
        l=new int[][] {{1,2,3},{4,5,6},{7,8,9}};
        m=new int[][] {{1,2,3},{4,5,6},{7,8,9}};
        n=new int[3][3];
        }
        void display()
        {
        for(int i=0;i<3;i++)
        {
        for(int j=0;j<3;j++)
        {
        for(int k=0;k<3;k++)
        {

                n[i][j]=n[i][j]+(l[i][k]*m[k][j]);
               
        }
                System.out.print("  "+n[i][j]);
                
        }
                System.out.println(" ");
        }
        }
}
class Matrix_multipl
{
        public static void main(String arg[])
        {
        Matrix a1=new Matrix();
        a1.display();
       
        }
}