Table of Contents
Pattern Programs in C++
In this article, we will see how to print star pattern in java. Pattern printing programs are good for logic building in programming. We will discuss different types of Star pattern and see the logic behind printing it.
1. Pyramid Star Pattern
Example:
*
***
*****
*******
*********
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int p,r,t,i,j;
clrscr();
int rows = 5;
for (i = 1; i <= rows; i++)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
cout<<“*”;
}
cout<<endl;
}
getch();
}
2. Inverted Pyramid Star Pattern
Example:
*********
*******
*****
***
*
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
clrscr();
for (i = rows; i >= 1; i–)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
cout<<“*”;
}
cout<<endl;
}
getch()
}
3. Right-Angled Triangle Star Pattern
Example:
*
**
***
****
*****
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = 1; i <= rows; i++)
{
for (j = 1; j <= i; j++)
{
cout<<“*”;
}
cout<<endl;
}
getch();
}
4. Inverted Right-Angled Triangle Star Pattern
Example:
*****
****
***
**
*
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = rows; i >= 1; i–)
{
for (j = 1; j <= i; j++)
{
cout<<“*”;
}
cout<<endl;
}
getch();
}
5. Left-Aligned Triangle Star Pattern
Example:
*
**
***
****
*****
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = 1; i <= rows; i++)
{
for (j = 1; j <= i; j++)
{
cout<<“*”;
}
cout<<endl;
}
getch();
}
6. Inverted Left-Aligned Triangle
Example:
*****
****
***
**
*
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = rows; i >= 1; i–)
{
for (j = 1; j <= i; j++)
{
cout<<“*”;
}
cout<<endl;
}
getch();
}
7. Diamond Star Pattern
Example:
*
***
*****
*******
*********
*******
*****
***
*
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = 1; i <= rows; i++)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
cout<<“*”;
}
cout<<endl;
}
for (i = rows – 1; i >= 1; i–)
{
for (j = rows; j > i; j–)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
cout<<“*”;
}
cout<<endl;
}
getch();
}
8. Right-Left Triangle Star Pattern
Example:
* *
** **
*** ***
**** ****
**********
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = 1; i <= rows; i++)
{
for (j = 1; j <= i; j++)
{
cout<<“*”;
}
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= i; j++)
{
cout<<“*”;
}
cout<<endl;
}
getch();
}
9. Sandglass Star Pattern
Example:
*********
*******
*****
***
*
***
*****
*******
*********
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = rows; i >= 1; i–)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
cout<<“*”;
}
cout<<endl;
}
for (i = 1; i <= rows; i++)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
cout<<“*”;
}
cout<<endl;
}
getch();
}
10. Hollow Square Star Pattern
Example:
*****
* *
* *
* *
*****
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int size = 5, i, j;
for (i = 1; i <= size; i++)
{
for (j = 1; j <= size; j++)
{
if (i == 1 || i == size || j == 1 || j == size)
{
cout<<“*”;
}
else
{
cout<<” “;
}
}
cout<<endl;
}
getch();
}
11. Hollow Pyramid Star Pattern
Example:
*
* *
* *
* *
*********
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = 1; i <= rows; i++)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
if (j == 1 || j == (2 * i – 1) || i == rows)
{
cout<<“*”;
}
else
{
cout<<” “;
}
}
cout<<endl;
}
getch();
}
12. Hollow Diamond Star Pattern
Example:
*
* *
* *
* *
* *
* *
* *
* *
*
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = 1; i <= rows; i++)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
if (j == 1 || j == (2 * i – 1))
{
cout<<“*”;
}
else
{
cout<<” “;
}
}
cout<<endl;
}
for (i = rows – 1; i >= 1; i–)
{
for (j = rows; j > i; j–)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
if (j == 1 || j == (2 * i – 1))
{
cout<<“*”;
}
else
{
cout<<” “;
}
}
cout<<endl;
}
}
13. Hollow Inverted Pyramid
Example:
*********
* *
* *
* *
*
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = rows; i >= 1; i–)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
if (j == 1 || j == (2 * i – 1) || i == rows)
{
cout<<“*”;
}
else
{
cout<<” “;
}
}
cout<<endl;
}
getch();
}
14. Cross (X) Star Pattern
Example:
* *
* *
* *
* *
*
* *
* *
* *
* *
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int size = 9, i, j;
for (i = 1; i <= size; i++)
{
for (j = 1; j <= size; j++)
{
if (j == i || j == size – i + 1)
{
cout<<“*”;
}
else
{
cout<<” “;
}
}
cout<<endl;
}
getch();
}
15. Butterfly Star Pattern
Example:
* *
** **
*** ***
**** ****
***** *****
************
************
***** *****
**** ****
*** ***
** **
* *
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int n = 6, i, j;
for (i = 1; i <= n; i++)
{
for (j = 1; j <= 2 * n; j++)
{
if (j > i && j <= 2 * n – i)
{
cout<<” “;
}
else
{
cout<<“*”;
}
}
cout<<endl;
}
for (i = n; i >= 1; i–)
{
for (j = 1; j <= 2 * n; j++)
{
if (j > i && j <= 2 * n – i)
{
cout<<” “;
}
else
{
cout<<“*”;
}
}
cout<<endl;
}
getch();
}
16. Pyramid Number Pattern – 1
Example:
1
222
33333
4444444
555555555
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = 1; i <= rows; i++)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
cout<<i;
}
cout<<endl;
}
getch();
}
17. Pyramid Number Pattern – 2
Example:
1
123
12345
1234567
123456789
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = 1; i <= rows; i++)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
cout<<j;
}
cout<<endl;
}
getch();
}
18. Pyramid Number Pattern – 3
Example:
1
234
56789
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j, num;
num = 1;
for (i = 1; i <= rows; i++)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
cout<<num;
num++;
}
cout<<endl;
}
getch();
}
19. Inverted Pyramid Number Pattern – 1
Example:
555555555
4444444
33333
222
1
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = rows; i >= 1; i–)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
cout<<i;
}
cout<<endl;
}
getch();
}
20. Inverted Pyramid Number Pattern – 2
Example:
123456789
1234567
12345
123
1
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = rows; i >= 1; i–)
{
for (j = i; j < rows; j++)
{
cout<<” “;
}
for (j = 1; j <= (2 * i – 1); j++)
{
cout<<j;
}
cout<<endl;
}
getch();
}
21. Right-Angled Triangle Number Pattern – 1
Example:
1
22
333
4444
55555
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = 1; i <= rows; i++)
{
for (j = 1; j <= i; j++)
{
cout<<i;
}
cout<<endl;
}
getch();
}
22. Right-Angled Triangle Number Pattern – 2
Example:
1
12
123
1234
12345
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = 1; i <= rows; i++)
{
for (j = 1; j <= i; j++)
{
cout<<j;
}
cout<<endl;
}
getch();
}
23. Inverted Right-Angled Triangle Number Pattern – 1
Example:
11111
2222
333
44
5
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = rows; i >= 1; i–)
{
for (j = 1; j <= i; j++)
{
cout<<i;
}
cout<<endl;
}
getch();
}
24. Inverted Right-Angled Triangle Number Pattern – 2
Example:
12345
1234
123
12
1
C++ Program:
#include <iostream.h>
#include<conio.h>
void main()
{
int rows = 5, i, j;
for (i = rows; i >= 1; i–)
{
for (j = 1; j <= i; j++)
{
cout<<i;
}
cout<<endl;
}
getch();
}
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