## 9.30.2012

### Star Structure

Q. Write a c program to print the following star structure:

*********
*******
*****
***
*
***
*****
*******
*********

Ans.
/*c program for print the star structure*/
#include<stdio.h>
#include<conio.h>
int main()
{
int num,n,r,c,sp;
printf("Enter number of rows: ");
scanf("%d", &num);
printf("\n");
n=num;
for(r=1; r<=num; r++)
{
for(sp=1; sp<=r; sp++)
printf(" ");
for(c=1; c<=n; c++)
printf("*");
for(c=num-r; c>=1; c--)
printf("*");
n--;
printf("\n");
}
for(r=2; r<=num; r++)
{
for(sp=num-r+1; sp>=1; sp--)
printf(" ");
for(c=1; c<=r; c++)
printf("*");
for(c=r-1; c>=1; c--)
printf("*");
printf("\n");
}
return 0;
}

The output of above program would be:

 Screen shot for specific star structure C program

1. we can short this code by..
int i,j,k;
for(i=-3;i<=3:i++)
{
k=i;
if(k=0;j--)
{
if(j<=k)
printf("* ");
else
printf(" ");
}
printf("\n");
}

2. //ravikant kedia
class ravikantkedia
{
public static void main(String args[])
{

int n=21;
int m=0;//or space
int o=n;//fror star
boolean b1=true;
boolean b2=true;

for(int i=0;i<n;i++)
{
for(int j=0;j<m;j++)
{
System.out.print(" ");
}
for(int k=0;k<o;k++)
{
System.out.print("*");
}
if(m==n/2) b1=false;
if(o==1) b2=false;
m=b1? m+1:m-1;
o=b2? o-2:o+2;
System.out.println();

}

}
}