Exemplo

const int YESTERDAY = 0;
const int TODAY = 1;
const int TOMORROW = 2;

void main( int argc, char* argv[]) {
int dateType = atoi(argv[ 0 ] );

Calendar calendar = new Calendar();
switch ( dateType ) {
case 0:
calendar.add( Calendar.DATE, -1 );
break ;
case 1:
break ;
case 2:
calendar.add( Calendar.DATE, 1 );
break ;
}

cout << calendar.getTime();
}
Solução
Inclua o rótulo default na instrução switch.

const int YESTERDAY = 0;
const int TODAY = 1;
const int TOMORROW = 2;

void main( int argc, char* argv[]) {
int dateType = atoi(argv[ 0 ] );

Calendar calendar = new Calendar();
switch ( dateType ) {
case 0:
calendar.add( Calendar.DATE, -1 );
break ;
case 1:
break ;
case 2:
calendar.add( Calendar.DATE, 1 );
break ;
default :
break ;
}

cout << calendar.getTime();
}