Star Patterns
C program to print 8 star pattern
Write a C program to print 8 star pattern series using loop. How to print 8 star pattern series using for loop in C program. Logic to print 8 star pattern series of N columns in C programming.
Example
Input
Input N: 5
Output
*** * * * * * * *** * * * * * * ***
Required knowledge
Basic C programming, If else, For loop, Nested loop
Logic to print 8 star pattern
To simply things for beginners I have divided entire logic in three main sub tasks.
->Print a hollow square star pattern with N columns and (N*2) - 1 rows.
->Modify above hollow square pattern logic. Instead of star, print space at top and bottom corners and in the center intersection edge.
->Finally modify hollow square logic to print star instead of space for Nth row.
Step by step descriptive logic to print 8 star pattern.
1.Input number of columns to print from user. Store it in a variable say N.
2.Iterate through (N*2)-1 rows. Run an outer loop with structure for(i=1; i 3.Iterate through N columns. Run an inner loop with structure for(j=1; j<=N; j++). 4.Inside inner loop first check conditions for corner and center intersection spaces. Print space for 1st row and 1st or Nth column i.e. if(i==1 && (j==1 || j==N)) Nth row and 1st or Nth column i.e. if(i==N && (j==1 || j==N)) N*2-1 row and 1st or Nth column i.e. if(i==N*2-1 && (j==1 || j==N)) 5.Print stars for 1st row or 1st column i.e. if(i==1 || j==1) Nth row or Nth column i.e. if(i==N || j==N) N*2-1th row i.e. if(i==N*2-1). 6.Otherwise print spaces if above conditions does not matches. Output Enter size: 6Program to print 8 star pattern
/**
* C program to print 8 star pattern series
*/
#include <stdio.h>
int main()
{
int i, j, size;
printf("Enter size: ");
scanf("%d", &size);
for(i=1; i<size*2; i++)
{
for(j=1; j<=size; j++)
{
// Condition for corner and center intersection space
if((i==1 && (j==1 || j==size)) ||
(i==size && (j==1 || j==size)) ||
(i==size*2-1 && (j==1 || j==size)))
{
printf(" ");
}
else if(i==1 || i==size || i==(size*2)-1 || j==1 || j==size)
{
printf("*");
}
else
{
printf(" ");
}
}
printf("\n");
}
return 0;
}
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