2 fuctions please

**dac** · 02-13-2006

hi,
could anyone give me examples of 2 fuction please.
1) to force 'enter only numbers' not letters
2) to force 'enter only letters' not numbers

thanks.

**SlyMaelstrom** · 02-13-2006

Code:

void ENTERANUMBER(int &num) {
    cout << "ENTER A NUMBER AND ONLY A NUMBER!!!!";
    cin >> num;
}
void ENTERALETTER(char &let) {
    cout << "ENTER A LETTER AND ONLY A LETTER!!!!";
    cin >> let;
}

**qqqqxxxx** · 02-13-2006

alrite if u incorporate a bit of warning in those functions they will work well,like:-
suppose someone enters a number when he should enter a letter ,the function should give out an error message and should ask him to enter a letter again,this should go on till he enters a letter,now thats a " force letter only " function.

**SlyMaelstrom** · 02-13-2006

Regardless, he'd have to know how to clear cin after the stream fails.

Your easiest bet would be to take it in as a character, regardless, compare it's ASCII range to the range that letters are in or numbers are in. If it matches, keep it, if it doesn't, ask again.

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