int n = 0, StudentID = 0;
int AllStudentData[3][5] = { {1232, 10, 23, 45, 56}, {2343, 45, 43, 24, 78}, {2343, 34, 45, 45, 45}, {3423, 67, 6, 65, 56}};
cin >> n;
switch (n)
{
case 1:
PrintAllStudentData();
break;
case 2:
PrintStudentData(StudentID)
break;
case 3...