Common Error

What is wrong with the following?

int std_Number = 0;

while (std_Number != -1)

{

cout << "Enter student number (-1 to quit)" << endl;

cin >> std_Number;

InsertItem(std_Number);

}

How to correct?

int std_Number = 0;

cout << "Enter student number (-1 to quit)" << endl;

cin >> std_Number;

while (std_Number != -1);

{

InsertItem(std_Number);

cout << "Enter student number (-1 to quit)" << endl;

cin >> std_Number;

}