.exe has stopped working

[1vf9z8AR]

This is my code but when i compile it on codeblocks it says .exe has stopped working after taking input.

  #include<iostream>
using namespace std;
int digits(long int n[],int i)
{
    int no=1,j=n[i];
    while(j>1)
    {
        j=j/10;
        no++;
    }
    return no;
}
int main()
{
    int t,j=1,i=0,length;
    long int n[1000];
    cout<<"Enter number of test cases:";cin>>t;
    cout<<endl;
    while(i<t)
    {
        cin>>n[i];
        cout<<endl;
        i++;
    }
    i=0;
    while(i<t)
    {
        length=digits(n,i);
        int sum=0;
        int div=10;
        while(j<=length)
        {
         sum+=(n[i]%div);
            div*=10;
        }
        cout<<sum<<endl;
    }
}

[Repeater]

Your second and third while loops will never end

[1vf9z8AR]

why second loop? i put i++

[Repeater]

These ones:

 while(i<t)
    {
        length=digits(n,i);
        int sum=0;
        int div=10;
        while(j<=length)
        {
         sum+=(n[i]%div);
            div*=10;
        }
        cout<<sum<<endl;
    }

They never end.