Funplaza

A Program For Binary Calculation in C++

2011-07-20T05:21:00.001-07:00

#include<iostream.h>
#include<conio.h>
class binary_calculation
{
protected :
    float x;
    float y;

public :
    virtual float calculate()
    {
      cout<<"Please enter 1 to 4 as your option";
      cin.get();
      return (0);
    }
    void getdata()
    {
      cout<<"Enter the numebrs ";
      cin>>x>>y;
    }
};
class addition :public binary_calculation
{
float calculate()
{
    return (x+y);
    }
};
class subtraction : public binary_calculation
{
float calculate ()
{
    return (x-y);
}
};
class multiplication : public binary_calculation
{
float calculate ()
{
    return (x*y);
}
};
class division : public binary_calculation
{
float calculate ()
{
    return (x/y);
}
};
main()
{
binary_calculation *p;
addition A;
subtraction S;
multiplication M;
division D;
clrscr();
int opt;
float result;
cout<<"1-Addition"<<endl
<<"2-Subtractio"<<endl
<<"3-Multiplication"<<endl
<<"4-Division"<<endl
<<"Your option";
cin>>opt;
switch (opt)
{
   case 1 :
   p=&A;
   break;
   case 2 :
   p=&S;
   break;
   case 3 :
   p=&M;
   break;
   case 4 :
   p=&D;
   break;
}
if (opt>4)
   result = p->binary_calculation::calculate();
else
{
    p->getdata();
    result=p->calculate();
    cout<<"Result = "<<result;
}
getch();
}

A progarm to read an integer number and test if it is prime it uses a constructor with arguments

2011-06-23T00:59:00.001-07:00

#include<iostream.h>
#include<conio.h>
#include<iomanip.h>
#include<math.h>

struct anynumber
{
int n;
int prime;
public :

   anynumber (int any)
   {
     prime = 1;
     n=any;
   }
   void isprime();
   void display()
   {
     if (prime==0)
       cout<<endl<<"Is not a prime number";
     else
       cout<<endl<<"Is a prime number";
   }
};
void anynumber :: isprime()
{
int i;
float s;
s=sqrt(n);
for (i=2; i<=s; i++)
{
    if (n%i ==0)
    {
      prime =0;
      return;
    }
}
}

main()
{
   int k;
   clrscr();
   cout<<"Enter the number"<<endl;
   cin>>k;
   anynumber testno(k);
   testno.isprime();
   testno.display();
   getch();
}

A program to assign values of 10 and 12 to X and Y coordinates of a point

2011-06-23T00:57:00.001-07:00

#include<iostream.h>
#include<conio.h>
#include<iomanip.h>

struct point
{
float x;
float y;
public :

   void getxy (float xcord, float ycord)
   {
    x=xcord;
    y=ycord;
   }
   void showxy ()
   {
      cout<<"X coordinates = "<<x<<endl;
      cout<<"Y coordinates = " <<y;
   }
};

main()
{
   point p;
   clrscr();
   p.getxy(10, 5);
   p.showxy();
   getch();
}