Driver 's Code
int main ( ) { int n = 642 ; cout << n << " ▁ : ▁ " ; if ( isSandwitched ( n ) ) cout << " Yes STRNEWLINE " ; else cout << " No STRNEWLINE " ; n = 9 ; cout << n << " ▁ : ▁ " ; if ( isSandwitched ( n ) ) cout << " Yes STRNEWLINE " ; else cout << " No STRNEWLINE " ; return 0 ; }