Wednesday, December 3, 2014

C++ program to add two complex numbers

#include

#include

class complex

   public :

      int real, img;

};

int main()

   complex a, b, c;

   cout << "Enter a and b where a + ib is the first complex number.";

   cout << "\na = ";

   cin >> a.real;

   cout << "b = ";

   cin >> a.img;

   cout << "Enter c and d where c + id is the second complex number.";

   cout << "\nc = ";

   cin >> b.real;

   cout << "d = ";

   cin >> b.img;

   c.real = a.real + b.real;

   c.img = a.img + b.img;

   if ( c.img >= 0 )

      cout << "Sum of two complex numbers = " << c.real << " + " << c.img << "i";

   else

      cout << "Sum of two complex numbers = " << c.real << " " << c.img << "i";

   return 0;

C++ program for prime numbers

#include

#include

#include

int main()

   int n, status = 1, num = 3, count, c;

   cout << "Enter the number of prime numbers to print\n";

   cin >> n;

   if ( n >= 1 )

      cout << "First " << n <<" prime numbers are :-" << endl;

      cout << 2 << endl;

   for ( count = 2 ; count <=n ;  )

      for ( c = 2 ; c <= (int)sqrt(num) ; c++ )

         if ( num%c == 0 )

            status = 0;

            break;

      if ( status != 0 )

         cout << num << endl;

         count++;

      status = 1;

      num++;

   return 0;

#include

#include

using namespace std;

main()

   int n, c, first = 0, second = 1, next;

   cout << "Enter the number of terms of Fibonacci series you want" << endl;

   cin >> n;

   cout << "First " << n << " terms of Fibonacci series are :- " << endl;

   for ( c = 0 ; c < n ; c++ )

      if ( c <= 1 )

         next = c;

      else

         next = first + second;

         first = second;

         second = next;

      cout << next << endl;

   return 0;