Program to Double pyramid star pattern in C++

In this tutorial, we will discuss a simple concept of the Program to Double pyramid star pattern in C++

In this post, we will learn how to create double (integrated) pyramid star pattern in C++ language.

We can use for loop, while loop or do while loop to display different integrated star patterns.

Here, we will use for loop to print different integrated pyramid star patterns

Program 1

Integrated pyramid star pattern 1

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int rows,i,j;
    cout << "Enter the number of rows: "<< endl;
    cin>>rows;//take input from user for rows
    for(i=1; i<=rows; i++){    //print upper part
    for(j=i; j<=rows; j++){
      cout <<"*";//print star to upper part
}
cout << "\n";
}

for(i=rows-1; i>=1; i--){  //print lower part
    for(j=i; j<=rows; j++){
      cout << "*";//print star to lower part
}
cout << "\n";
        }
        getch();
    return 0;
}

When the above code is executed, it produces the following result

Enter the number of rows: 6
******
*****
****
***
**
*
**
***
****
*****
******

Integrated pyramid star pattern 2

Program 2

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int rows,i,j,k;
    cout<<"Enter the number of rows\n";
    cin>>rows;//take input from user for rows
    for(i=1; i<=rows; i++){    //print upper part
    for(j=1; j<=i; j++){
       cout<<" ";
}
for(k=i; k<=rows; k++){
       cout<<"*";//print star to upper part
       cout<<" ";
}
 cout<<"\n";//move to next line
}

for(i=rows-1; i>=1; i--){  //print lower part
    for(j=1; j<=i; j++){
       cout<<" ";
}
for(k=i; k<=rows; k++){
       cout<<"*";//print star to lower part
       cout<<" ";
}
 cout<<"\n";

}
getch();
return 0;
}

When the above code is executed, it produces the following result

Enter the number of rows: 6
*   *   *   *   *   *
  *   *   *   *   *
    *   *   *   *
      *   *   *
        *   *
          *
        *   *
      *   *   *
    *   *   *   *
  *   *   *   *   *
*   *   *   *   *   *

Integrated pyramid number pattern 3

Program 3

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int rows,i,j;
    cout<<"Enter the number of rows: ";
    cin>>rows;//take input from user to rows
    for(i=1; i<=rows; i++){    //print upper part
    for(j=1; j<i; j++){
      cout<<" ";//print space
}
for(j=i; j<=rows; j++){
      cout<<"*";
}
cout<<"\n";
}

for(i=rows-1; i>=1; i--){
  for(j=1; j<i; j++){
      cout<<" ";//print space
}

for(j=i; j<=rows; j++){  //print lower part
      cout<<"*";
}
cout<<"\n";
        }
    return 0;
}

When the above code is executed, it produces the following result

Enter the number ofrows: 6
******
  *****
    ****
      ***
        **
          *
        **
      ***
    ****
  *****
******

Integrated pyramid number pattern 4

Program 4

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int rows,i,j,k;
    cout<<"Enter the number of rows: ";
    cin>>rows;//take input from user for rows
    for(i=1; i<=rows; i++){    //print upper part
    for(j=1; j<=rows-i; j++){
      cout<<" ";
}
for(k=1; k<=i; k++){
      cout<<"*";//print star to upper part
     cout<<" ";
}
cout<<"\n";
}

for(i=1; i<=rows-1; i++){  //print lower part
    for(j=1; j<=i; j++){
      cout<<" ";
}
for(k=1; k<=rows-i; k++){
      cout<<"*";//print star to lower part
      cout<<" ";
}
cout<<"\n";
        }
        getch();
    return 0;
}

When the above code is executed, it produces the following result

Enter the number of rows: 6
         *
       *  *
     *  *  *
   *  *  *  *
  *  *  *  * *
*  *  *  *  * *
  *  *  *  *  *
    *  *  *  *
      *  *  * 
        *  *
          *

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