In the code below i have used Switch statement. But i want to use(if else) istead of Switch, What changes should i make?

Question

#include <iostream>
using namespace std;

int main() {
char letter;
cin>>letter;
switch(letter*(letter>='a' && letter<='z')){
case 'a':
case 'e':
case 'i':
case 'o':
case 'u': cout<<"you entered a vowel"<<endl;
break;
case 0:cout<<"that is not a small letter"<<endl;
break;
default:cout<<"you entered a constant"<<endl;

}
return 0;
}

Answer 1

Here :

#define islower(a) a>='a' && a<='z'
if( islower(letter) )
{
if (letter == 'a' || letter == 'e' || letter == 'i' || letter == 'o' || letter == 'u')
cout<<"User entered a Vowel"<<endl;
else
cout<<"User entered a Consonant"<<endl;
}
else
cout<<"Invalid Input - Not a Small Letter";

Answer 2

@Daniel thank you alot

Answer 3

@RiGel
Just to check if the input was a small letter or not.
If its not, we'll have to display an error that the input is not a small letter.
Though we have a predefined function for this in the header <cctype>, with the same name, I redefined it so that you can easily understand what its supposed to do.

Answer 4

@Kinshuk thank you alot

Answer 5

first an if to check if letter is or not (else) small

if first if is correct then check with an if with OR conditions to check if letter is a vowel

Answer 6

@kinshuk thank you for ur answer i hope its not late too ask..but what is (islower) exactly used for?

Answer 7

Check the first line of his code ;-)

Answer 8

@Daniel Thank you

Answer 9

@Kinshuk THANK YOU ALOT!