C ++ Programs

Welcome to C++ Programs and example. it is actually designed to help understands and master C++ Programming language

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C++ hello world example

#include<iostream>


using namespace std;


int main()

{

    cout << "Hello World\n";

    return 0;

}

C++ hello world class program

#include<iostream>


using namespace std;


// Creating class


class Message

{

  public:


    void display() {

      cout << "Hello World\n";

    }

};


int main()

{

    Message c;    // Creating an object

    c.display();  // Calling the function


    return 0;

}

C++ programming code

#include <iostream>


using namespace std;


int main()

{

   int a, b, c;

 

   cout << "Enter two integers to add\n";

   cin >> a >> b;


   c = a + b;

   cout <<"Sum of the numbers: " << c << endl;

 

   return 0;

}

C++ program to reverse a number

#include <iostream>


using namespace std;


class Operations

{

  long c;


public:

  void inputNumber()

  {

    cout << "Input a number\n";

    cin >> c;

  }


  long reverseNumber()

  {

    long invert = 0;


    while (c != 0)

    {

      invert = invert * 10;

      invert = invert + c%10;

      c = c/10;

    }


    return invert;

  }


};


int main()

{

  long result;


  Operations t;

  t.inputNumber();

  result = t.reverseNumber();


  cout << "Number obtained on reversal = " << result;


  return 0;

}

C++ program to add two complex numbers

#include <iostream>

using namespace std;

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++ programming code

#include<iostream>


#include<cmath>


using namespace std;


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;

C++ programming code

#include<iostream>

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;
}

C++ programming code

#include<iostream>
using namespace std;

main()
{
   int first[20], second[20], c, n;
   
   cout << "Enter the number of elements in the array ";
   cin >> n;

   cout << "Enter elements of first array " << endl;

   for ( c = 0 ; c < n ; c++ )
      cin >> first[c];

   cout << "Enter elements of second array " << endl;

   for ( c = 0 ; c < n ; c++ )
      cin >> second[c];

   cout << "Sum of elements of two arrays " << endl;

   for ( c = 0 ; c < n ; c++ )
      cout << first[c] + second[c] << endl;
     
   return 0;
}

C++programming code

#include<iostream>

using namespace std;

main()
{
   int m, n, c, d, first[10][10], second[10][10], sum[10][10];
   
   cout << "Enter the number of rows and columns of matrix ";
   cin >> m >> n;
   cout << "Enter the elements of first matrix\n";

   for (  c = 0 ; c < m ; c++ )
      for ( d = 0 ; d < n ; d++ )
         cin >> first[c][d];

   cout << "Enter the elements of second matrix\n";

   for ( c = 0 ; c < m ;c++ )
      for ( d = 0 ; d < n ; d++ )
            cin >> second[c][d];

   for ( c = 0 ; c < m ; c++ )
      for ( d = 0 ; d < n ; d++ )
         sum[c][d] = first[c][d] + second[c][d];

   cout << "Sum of entered matrices:-\n";

   for ( c = 0 ; c < m ; c++ )
   {
      for ( d = 0 ; d < n ; d++ )
         cout << sum[c][d] << "\t";

      cout << endl;
   }

   return 0;
}

C++ programming code

#include<iostream>
#include<cstdlib>

using namespace std;

main()
{
   int n, max, num, c;

   cout << "Enter the number of random numbers you want ";
   cin >> n;
   cout << "Enter the maximum value of random number ";
   cin >> max;  
     
   cout << "Random numbers from 0 to " << max << " are:" << endl;
     
   for ( c = 1 ; c <= n ; c++ )
   {
      num = random(max);
      cout << num << endl;
   }        
   
   return 0;
}

C++ programming code

#include<iostream>

using namespace std;

class programming
{
   private:
      int variable;
   
   public:
     
      void input_value()
      {
         cout << "In function input_value, Enter an integer\n";
         cin >> variable;
      }
     
      void output_value()
      {
         cout << "Variable entered is ";
         cout << variable << "\n";
      }
};

main()
{
   programming object;
   
   object.input_value();
   object.output_value();
   
   //object.variable;  Will produce an error because variable is private
   
   return 0;
}

}