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
[code lang=”c”]
#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(" ");
}
}
[/code]
