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Break statement question.

I have a break statement that I have wrote (see below) What would the correct synyax(if it is possible) to add one more statement that is a catch all for all other entries. - I tried adding a while/do statement but that idea doesnt seem to work. Should I be including this in the switch statement or before? The while staement that I attemped is posted below too. Please advise. (Prefer comments and suggestions as opposed to writting the code for me., ) And as always, Thxs much!!

float Wages::assignHourlyRate()
{
      cout << "Enter classification: ";
      cin >> classification;
      classification = toupper(classification); ///I put the while statement here///
     switch (classification)
      {
      case 'A':rate = 10.25;break;
      case 'B':rate = 8.5;break;
      case 'C':rate = 6.3;break;
      case 'D':rate = 4.65;break;
      }
      system ("Pause");
      return 0;
}
while
      (classification != 'A'||classification != 'B'||classification != 'C'||classification != 'D')
            do
      cin >> classification;

jkr

You'd add a 'default:' statement, e.g.

float Wages::assignHourlyRate()
{
bool bClassificationOK= false;
cout << "Enter classification: ";

while ( !bClassificationOK) {
cin >> classification;
classification = toupper(classification);
bClassificationOK = true; //assume the best
switch (classification)
{
case 'A':rate = 10.25;break;
case 'B':rate = 8.5;break;
case 'C':rate = 6.3;break;
case 'D':rate = 4.65;break;
default: bClassificationOK = false; break; // reset if unknown
}
} // end while
system ("Pause");
return 0;
}

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jkr

Um, and what about the 'break;' statement thing?