Print dynamic star pattern using C

Question

Print dynamic star pattern for the given number as given below.

Logic

• Here you can see that star expands in all direction based on the input.
• We must print the star and also the blank spaces to get the desired result.
• Using two functions, we are printing the blanks spaces and gap between stars.
• Try to work out by giving any input. It’s very simple.

Program

#include<stdio.h>;
void space();// declaration of function
void gap();
void main()
{
  int in=0,len,i,sp,j,p,m,l;
  printf("enter input");
  scanf("%d",&in);
  len=(in*2)-1;// length of each row/column

  sp = in-2 ;

  /*sp ->number of blank spaces

  3->1

  5 ->2

   */

  p =sp;// blank spaces starting with sp
  l=1;// used to print blank spaces

// top half of pattern

  for(i=0;i<len/2;i++)
  {

    if(i!=0)  // no gap in first row
    { gap(l);
    l++;
    }
  printf("*");

  space(p);
  printf("*");
  space(p);

  printf("*\n");
  p--;

  }
  for(m=0;m<len;m++) // center of pattern , print len n0. of stars
      printf("*");
  printf("\n");
  p=sp;
  l=1;

//bottom half of pattern
  for(i=0;i<len/2;i++)
  {
  space(p);
  p--;
  printf("*");
    if(i!=0)
    { gap(l);
    }
  printf("*");
    if(i!=0)
    { gap(l);
    l++;
    }
  printf("*\n");
  }

}
void space(int sp)
{ // decreasing gap pattern
  int k;
  for( k=sp;k>0;k--)
 {
  printf(" ");
  }
 }
 void gap(int sp)
{ int k;

// increasing gap pattern
  for(k =0;k<sp;k++)
  {
  printf(" ");
  }
}

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