invalid user entry

[sailci]

I am using VC++ and am trying to figure out how to do a loop such that when the user enters a char of str the program will display error and ask the user to retry. I have it working for numbers but dont know how to solve the other invalid entry of letters. Any ideas?

void menu (int &selection)
{
	cout << "     Available Currencies Menu" << endl << endl;	//Display Menu
	cout << "1. British Pounds" << endl;
	cout << "2. Canadian Dollars" << endl;
	cout << "3. Indian Rupees" << endl;
	cout << "4. Japanese Yens" << endl;
	cout << "5. Mexican Pesos" << endl << endl;
	
	cout << "Please enter your selection number from the list above: # ";	//user enters menu selection
	cin >> selection;
	
	//validate selection
	while (selection < 1 || selection > 5)				//user entry validated
	{
		cout << "Invalid Entry! Please Enter Number Between 1-5" << endl;	//if invalid, error displayed
		cout << "Please try again: # ";		//user enters menu selection
		cin >> selection;
	}//end while
	
}//end menu selection function

[Sekti]

do
if(selection < 1 && selection > 5)
{
work
}
else
{
dont work
}

just a geuss see if it works

[Prelude]

Make the selection variable a char, then just use similar valiadation code:

while ( selection >= '1' && '5' >= selection ) {
  // Process
}

The way this works is that cin will always enter a char value, so you test that char value with the range of '1' - '5' instead of the integer values 1 - 5. If anything but '1', '2', '3', '4', or '5' is entered, the input is invalid.

-Prelude

[sailci]

Didn't work I think because the selection points to an array value that is const ????

I thought that if i specified what the valid selections that anything other than those would give error irregardless of what the entry is. I guess it all part of the learning process.