Function to return true if two letters are either both upper or both lower case not working, c++

Question

#include <iostream>
using namespace std;

char myChar_1 = 'a';
char myChar_2 = 'b';
char checkChar(char myChar_1,char myChar_2){
    if ((isupper(myChar_1) && isupper(myChar_2)) || (islower(myChar_1) && islower(myChar_2))) {
        return true;
    }
    else{
        return false;
    }

}

int main()
{
    cout << checkChar(myChar_1, myChar_2);

}

The output is an upside-down question mark. Would be great if someone could tell me what I'm doing wrong. Niko

you are declaring a function with keyword as char and returning a boolean true false value...... — NetStarter, Feb 07 '13 at 11:47

Joseph Mansfield · Accepted Answer · 2013-02-07T11:50:24.637

7

Your return type should be bool. You're returning true and false as chars and then outputting that character. When converting from bool to an integral type, true is converted to 1 and false is converted to 0. So you're printing out chars with values of 0 or 1.

edited Feb 07 '13 at 11:50

answered Feb 07 '13 at 11:45

Joseph Mansfield

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ah, thanks! what a stupid mistake.... – Nikolai Stiksrud Feb 07 '13 at 11:48

Function to return true if two letters are either both upper or both lower case not working, c++

1 Answers1