Insert Element in Stack

#include
using namespace std;
int main()
{
int a[8]={1,2,3,4},item=10,i=7;
while(a[i]=='\0')
{
i--;
}
i++;
a[i]=item;

for(i=0;i<8;i++)
{
cout<<a[i]<<endl;
}
return 0;
}