Code problems pls check i8t

#1

#include
using namespace std;

void calculation(int arr[],int n)
{

int arr2[4][4]={0};
for(int i=0;i<n;i++)
{
	for(int j=3;j>=0;j--)
	{
		arr2[i][j]=arr[i]%10;
		arr[i]=arr[i]/10;
	}
}
for(int i=0;i<n;i++)
{
	for(int j=0;j>=3;j++)
	{
		cout<<arr2[i][j]<<" ";
	}cout<<endl;
}

for(int i=0;i<n;i++)
{
	for(int j=0;j>=3;j++)
	{
		cout<<arr2[i][j]<<" ";
	}cout<<endl;
}

}

int main()
{
// int t,z=0;
// cin>>t;
// // while(z<t)
// {
// if(z>=1 && z<=20)
// {

	    int n;
	    cin>>n;
	    if(n>=1 && n<=100)
	    {
		
		    int arr[100];
		    for(int i=0;i<n;i++)
		    {
		        cin>>arr[i];
		    }
		    calculation(arr,n);
		    // z++;
		}
	// }
// }

}

#2

Hi @angivanshikaangi
Please share your code using ide.codingblocks.com.
Also please give a brief description as to what you are trying to do in the calculation function.