Logic c++ program

Armstrong number in logic explanation and code dry run

 #include

#include 

  int main()

  {

  int armstrong=0,num=0,result=0,check;

  cout<<"enter number to find it is an armstrong number?";

       cin>>num;

       check=num;

       for(int i=1;num!=0;i++)

{

   armstrong=num%10;
   num=num/10;
   armstrong=armstrong*armstrong*armstrong;
   result=result+armstrong;
     }
       if(result==check)

{
   cout<      }
       else

{
   cout<     }
       return 0;
    }

C++ code to print right triangle shape using   for loops

 #include

#include 

int main()

{

   for(int i=0;i<=5;i++)

{
   for(int j=0;j<=i;j++)
            {
                cout<
            }
       cout<
    }
 return 0;
}

Greatest Common Divisor (GCD) of two numbers

 #include

#include 

int main() 

{
   int first_number;
   cout<<"enter first number : ";cin>>first_number;

  int  second_number;
  cout<<"enter second number: ";cin>>second_number;

  int  gcd;
  for(int i=1;i<=first_number&&i<=second_number;i++)

{
   if(first_number%i==0 && second_number%i == 0 )

{
  gcd=i;
  }
}
cout<<"greatest common divison (gcd):"<
 return 0;
}

Reverse a Number in C++ Program Code

#include

#include 

int main() 

{
           int number, reverse = 0;
           cout<<"input a number to reverse and press enter: ";
           cin>> number;  

           for( ; number!= 0 ; )
   {
          reverse = reverse * 10;
          reverse= reverse + number%10;
          number = number/10;
   }
        cout<<"new reversed number is:  "<
       return 0;

}

Linear search in C++ Program Example Code

 #include

#include 

int main() 

{
cout<<"enter the size of array:   ";
int size;
cin>>size;

int array[size], key,i;

     taking input in array
      for(int j=0;j

{
     cout<<"enter "<
     cin>>array[j];
 }

    your entered array is
    for(int a=0;a

{
    cout<<"array[ "<
     cout<
 }

    cout<<"enter key to search  in array";
    cin>>key;

    for(i=0;i

{
     if(key==array[i])

{
     cout<<"key found at index number :  "<
     break;
   }
 }


     if(i != size)

{
     cout<<"key found at index :  "<
}
     else

{
      cout<<"key not found in array  ";
}
   return 0;
}