isalpha and isdigit error for exception handling

[king03]

Hi there guys I need some help I am creating an inventory with loads of exception handlers, I got a problem with isalpha and isdigit because supposedly it will detect whether an input is a char or a digit... Ok I tested a simple program to show my problem. I only used if-else in this code for it to be less complicated. When I type in a letter or a number it just proceeds to press any key to continue... Can somebody figure out what's wrong with this?

#include <iostream>
#include <string>
#include <cctype>

using namespace std;

int main()
{
    int sample;
    
    cin>>sample;
    
    if(isalpha(sample))
    cout<<"sample is a char";
    else if(isdigit(sample))
    cout<<"sample is an integer";
    
    
    system("pause");
    return 0;
}

[L7Sqr]

Change int sample to char sample .

[MareoRaft]

system("pause");
    return 0;
}

Also, the experts suggest:

"Don't use system("pause") to pause your program if possible. Use getchar( ) if you are using C and cin.get( ) if you are using C++."

This tip found here:

http://www.daniweb.com/software-development/cpp/threads/67837

:)