C++ code Diamond shape of space

Code
#include <iostream>
using namespace std;
int main()
{
   int i,j,r;
    cout << " Input number of rows : ";
    cin >> r;
   for(i=1;i<r;i++)
   {
    for(j=0;j<=r-i;j++)
     cout<<"*";
     for(j=2;j<=2*i-1;j++)
    cout<<" ";
       for(j=0;j<=r-i;j++)
     cout<<"*";
     cout<<endl;
   }
   for(i=r-1;i>=1;i--)
   {
     for(j=0;j<=r-i;j++)
     cout<<"*";
     for(j=2;j<=2*i-1;j++)
    cout<<" ";
       for(j=0;j<=r-i;j++)
     cout<<"*";
     cout<<endl;
   }
   cout<<endl;
   return 0;
}
Output:

C ++ write nested for loops to produce a triangular array of stars, in the form below.

C ++ write nested for loops to produce a triangular array of stars, in the form below.
**
****
*****
****
**

Code

#include <iostream>
using namespace std;
int main()
{
 int i, j, k;
 for(i=1; i<3; i++)
 {
  cout<<"* ";
 }
 cout<<endl;
 for(j=1; j<5; j++)
 {
  cout<<"* ";
 }
 cout<<endl;
 for(k=1; k<=5; k++)
 {
  cout<<"* ";
 }
 cout<<endl;
 for(j=1; j<5; j++)
 {
  cout<<"* ";
 }
 cout<<endl;

 for(i=1; i<3; i++)
 {
  cout<<"* ";
 }
 cout<<endl;
 return 0;

}

Code - 2

#include <iostream>
using namespace std;
int squaresum(int n) ;
int main()
{
int n;
 cout<<"Enter the number of row : ";cin>>n;cout<<endl;
     for(int i=0; i<=n; i++)
     {
      for(int j=1; j<=i; j++)
      {
       cout<<"*";
   }
   cout<<endl;
  }
  for(int i=n-1; i>1; i--)
  {
   for(int j=1; j<=i; j++)
      {
       cout<<"*";
   }
   cout<<endl;
  }
}

OUTPUT

Write C++ statement that compute the sum of squres of given positive integer

Code


#include <iostream>
using namespace std;
int squaresum(int n) ;

int main()
{
int n;
 cout<<"Enter a positive integer : ";cin>>n;
 cout << squaresum(n) << endl;
 return 0;
}
int squaresum(int n)
{

 int sum = 0;
 for (int i = 1; i <= n; i++)
  sum += (i * i);
 return sum;
}

OUTPUT

C++ code that will print only prime factor of given number

Code

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
 int n, i;
 cout<<"Please input an integer then press ENTER : ";cin>>n;

 while(n%2 == 0)
 {
 cout<<2<<" ";
 n = n/2;
 }
 for( i =3; i<=n; i=i+2)
 {
  while(n%i == 0)
  {
   cout<<i<<" ";
   n=n/i;
  }
 }
 if(n>2)
 {
  cout<<n<<" ";
 }

 return 0;
}

Write a program to print half pyramid / triangle using alphabets

Code

#include <iostream>
using namespace std;
int main()
{
 int i, j;
    char input, alphabet = 'A';
    cout << "Enter the uppercase character you want to print in the last row: ";
    cin >> input;
    for(i = 1; i <= (input-'A'+1); ++i)
    {
        for( j = 1; j <= i; ++j)
        {
            cout << alphabet << " ";
        }
        ++alphabet;
        cout << endl;
    }
    return 0;
}

Output - 

Write a program to print half pyramid / triangle using numbers

Code
#include <iostream>
using namespace std;
int main()
{
      int i, j, k;
      cout<< "Enter a positive number : ";cin>>k;

      for(i=1; i<=k; i++)
    {

              for(j=1; j<=i; j++)
           {
                    cout<< j << " ";
            }
        cout<<endl;
      }



 return 0;
}


Output-

Video - 

Write a C++ program to print half pyramid / triangle using *

Code

#include <iostream>
using namespace std;
int main()
{
         int i, j, k;
         cout<< "Enter a positive number : ";cin>>k;

         for(i=1; i<=k; i++)
     {

               for(j=1; j<=i; j++)
            {
                      cout<< " * ";
             }
         cout<<endl;
      }



 return 0;
}


Output

 Video - 

C++ code - Prime number with in given range

Code


   #include <iostream>
using namespace std;
int main()
{

          int i=2, j, is_prime, max, min;

 // we are going to add 2 more variable for maximum and minimum number

   

 cout <<"Enter a minimum number : ";cin>>min; cout<<endl;




cout<<"Enter a maximum number : ";cin>>max;


//because 1 or 0 is not prime number so we set the minimum bigger than 1
   

       i=min;
     while(i<max)
   {


  is_prime=true;

  for(j=2; j<i; j++)
  {
  if(i%j==0)
  {
  is_prime= false;
  }


  }
  if(is_prime)
{
if(i>1)
cout<<i<<" ";
}
  i++;
}




 return 0;

}

output -

Video link of this code - click me

Write a C++ code that will only print prime numbers 0 to 100

Code

#include <iostream>
using namespace std;

int main(){
 int i=2, j, is_prime;
 // we set i = 2 because prime numbers start at 2.
 while(i<100) {
              is_prime=true;

              for(j=2; j<i; j++){

                                       if(i%j == 0){
                                       is_prime = false;
                                                           }
                                        }
                           if(is_prime){
                           cout<< i <<" ";
                 }

                i++;
               }



 return 0;

}

Video link of this code with output click here


output -