public static void main(String[] args) {
Management m = new Management();
int input = 0;
m.init();
while (true) {
m.showList();
switch (input = m.selectList()) {
case 1:
m.insertInfo();
break;
case 2:
m.sortByRank();
m.showGradeByRank();
break;
case 3:
m.sortByNum();
m.showGradeByNum();
break;
case 4:
m.showGradeInDetail();
break;
case 5:
m.changePeople();
break;
case 6:
m.showSelectDelete();
m.deleteInfo();
break;
case 7:
System.exit(0);
}
}
}