C Program to Print Alphabet S Pattern

In this article, we will show how to write a C program to print the Alphabet S pattern or shape of stars using for loop, while loop, and functions.

#include <stdio.h>

int main()
{
	int rows;

	printf("Enter Rows = ");
	scanf("%d", &rows);

	for (int i = 0; i < rows; i++)
	{
		for (int j = 0; j < rows; j++)
		{
			if ((i == 0 || i == rows / 2 || i == rows - 1) && (j != 0) && (j != rows - 1))
			{
				printf("* ");
			}
			else if ((i != 0) && (j == 0) && (i < rows / 2 ))
			{
				printf("* ");
			}
			else if(j == rows - 1 && i > rows / 2 && i != rows - 1)
			{
				printf("* ");
			}
			else
			{
				printf("  ");
			}
		}
		printf("\n");
	}
	return 0;
}

Enter Rows = 15
  * * * * * * * * * *   
*                             
*                             
*                             
*                             
*                             
*                             
  * * * * * * * * * * 
                            * 
                            * 
                            * 
                            * 
                            * 
                            * 
  * * * * * * * * * * 

Instead of a for loop, this Alphabet S Pattern of stars program uses a while loop to iterate the rows and columns. For more star programs, click here.

#include <stdio.h>

int main()
{
	int i, j, rows;

	printf("Enter Rows = ");
	scanf("%d", &rows);

	i = 0;
	while ( i < rows)
	{
		j = 0;
		while ( j < rows)
		{
			if (i == 0 || i == rows / 2 || i == rows - 1)
			{
				printf("* ");
			}
			else if (((j == 0) && (i < rows / 2 )) || (j == rows - 1 && i > rows / 2))
			{
				printf("* ");
			}
			else
			{
				printf("  ");
			}
			j++;
		}
		printf("\n");
		i++;
	}
	return 0;
}

Enter Rows = 17
* * * * * * * * * * * * 
*                                 
*                                 
*                                 
*                                 
*                                 
*                                 
*                                 
* * * * * * * * * * * * 
                                * 
                                * 
                                * 
                                * 
                                * 
                                * 
                                * 
* * * * * * * * * * * * 

In this C program, we create an alphabetSPat function that accepts those values and prints the Alphabet S shape or pattern of the given char. 

#include <stdio.h>

void alphabetSPat(int rows, char a)
{
	for (int i = 0; i < rows; i++)
	{
		for (int j = 0; j < rows; j++)
		{
			if ((i == 0 || i == rows / 2 || i == rows - 1) && (j != 0) && (j != rows - 1))
			{
				printf("%c ", a);
			}
			else if ((i != 0) && (j == 0) && (i < rows / 2 ))
			{
				printf("%c ", a);
			}
			else if(j == rows - 1 && i > rows / 2 && i != rows - 1)
			{
				printf("%c ", a);
			}
			else
			{
				printf("  ");
			}
		}
		printf("\n");
	}
}

int main() {
	int rows;
	char a;

	printf("Enter Alphabet =  ");
	scanf("%c", &a);

	printf("Enter Rows = ");
	scanf("%d", &rows);

	alphabetSPat(rows, a);
	return 0;
}