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convert lower case to upper case

Hallo,

i am working on a program , it ask for a character and it gives an error if its a number

Now the next thing i want to do is if we give a character in lower case i want the program to convert it to upper case is it possible doing it, only using the #include <conio.h> ??

Thanks

#include <stdio.h>
#include <conio.h>
int main (void)

{
    int key;
    
    printf ( "give a key ");
    key = getch ();
     
     if (key >= '0' && key <= '9')
       printf ("\n\nError the key was not a character\n\n hit enter to close the program");
    
           if (key >= 'a' && key <= 'z')
              printf ("\n\nthe key was %c ",key);
    
    getchar();
    
    
    }

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evilrix

You can use toupper to do this.
http://www.cplusplus.com/reference/clibrary/cctype/toupper/

You will need to enumerate through the string and uppercase each char.

neuroskunk

string EventName;

EventName = txtEventName.Text;

EventName.ToUpper();

txtEventName.Text = EventName;

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Zoppo

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kensy11

ASKER

thanks

lucky_james

yes, it should be possible,
use printf ("\n\nupper case of the the key was %c ",key-32);
and this will give you the upper case.

lucky_james

ah, Zoppo has already given the answer. ! :)

evilrix

The problem with doing it that way is it relies on the underlying character encoding being of a format where this will work and there is nothing to say this is the case. The toupper function is a standard C function that is guaranteed to correctly convert to upper case given the correct locale (if you use the C++ version).