codevita box in a box solution

                              PROblem 

Idea is to take a number as input and print a pattern of boxes
If input is 2, two boxes are to be printed - one inside the other
Smallest box will be of size 3*3, the next bigger box will be 5*5, the next one will be 7*7, so on and so forth
For input 1, then draw a box of dimensions 3*3
For input 2, outer box will be 5*5, inner will be 3*3
For input 3, outer box will be 7*7, with 2 more inner boxes
So for n, outermost box will be n*2 +1 in size, with (n-1) inner boxes
All boxes will be top left aligned as shown in the figure

Input Format:

First line of input contains a number N

Output Format:

Print N nested boxes

Constraints:

1. 0 < N < 25 

Sample Input and Output

Example Number	Sample Input	Sample Output
1	2
2	3

 Solution 

 

#include<iostream>
using namespace std;
int main()
{
int n;
cout<<"enter N =  ";
cin>>n;

for(int i=1;i<=((2*n)+1);i++)
{
for(int j=1;j<=((2*n)+1);j++)
{
if(i==1||j==1||i==n*2+1||j==n*2+1)//for last box
cout<<"* ";
else
{
if(i%2==0)//for even line
{
if(j%2==0)
cout<<"  ";
else if(j<=i)
cout<<"  ";
else
cout<<"* ";
}

else if(i%2==1)// for odd line
{
if(j<=i)
cout<<"* ";
else if(j%2==0)
cout<<"  ";
else
cout<<"* ";
}
}
}
cout<<endl;
}
return 0;
}


       
PartyLesh

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