How many types of polymorphisms are supported by C++?

What is the output of the following C program?

How many maximum number of parameters does a string constructor can take? 

int **ptr; is?

A collection of generic classes and functions is called a

What is the purpose of the .* operator in programming?

#include<stdio.h>

void square(int *number)

{

        *number = *number * *number;

        return;

}

int main()

{

        int number = 5;

        square(&number);

        printf("%d\n", number);

}

What is the output of the following C code?

#include<stdio.h>

int main()

{

   int a=10;

   switch(a)

   {

      case a: printf("hello\n");break;

      case 10:printf("hello10\n");

      default:printf("default");break;

   }

}

What does the getche() function do?

#include <iostream>
using namespace std;

int addition (int a, int b)
{ return (a+b); }

int subtraction (int a, int b)
{ return (a-b); }

int operation (int x, int y, int (*functocall)(int,int))
{
 int g;
 g = (*functocall)(x,y);
 return (g);
}

int main ()
{
 int m,n;
 int (*minus)(int,int) = subtraction;

 m = operation (7, 5, addition);
 n = operation (20, m, minus);
 cout <<n;
 return 0;
}