Thread: Char to Ascii

Originally Posted by Sebastiani

First off, "char != #" is a string literal, so you might as well be passing "foobarbaz" - the result is the same. Drop the quotes. Second, (barring locale-specific issues) the char is already going to be in ASCII, conveniently enough, so no conversion is necessary.

After dropping the quotes, you'll also need to put a real expression in there. char is a data type, not a variable, and # should be in single quotes: '#'
You need to initialize the variable you use in place of the "char" you currently have...

Originally Posted by EVOEx

No offence here, but I'm always amazed what kind of constructs newbies come up with. How the heck do people even get to such a point. Really, one day we should collect ALL those constructs and write a programming language that supports them all. That's gotta be the easiest to learn language ever.
Even though the same line could mean about a dozen different things..

Isn't that called Perl?
No wait, it's the other way around. A dozen different lines can mean the same thing.

I believe the biggest problem is the "make this happen" approach, which computers do not understand. You must be specific and tell it how to accomplish "this". The computer can't read and interpret. It's kind of like mathematics.
Have you read some C book or tutorial?

Originally Posted by rogster001

but you also need to look at the construction of a loop because you are missing the curly braces

They are optional. If omitted, the first statement after the loop is what will be looped.

I don't think it's necessary with a loop at all, since the loop seems to be supposed to check if it's ASCII or not.

thanks for the help everyone! I'm slowly getting there

Code:

#include <stdio.h>
#include <ctype.h>

int main()
{

    char letter;

    printf("Enter a Letter\n");
    printf("Press '#' at any time to quit\n");

    scanf("%c%*c", &letter);

    while(letter != '#')

        {
        printf("Ascii Value= %d", letter);
        break;
        }

    printf("\n\n");
    printf("Enter a Letter\n");
    printf("Press '#' at any time to quit\n");

    scanf("%c%*c", &letter);

    return(0);
}

At the moment this works well but I need to...

1) If the user inputs an upper case letter, the program needs to convert it to lower case and vise versa. I know the code is letter = tolower(letter); but how do I do it at the same time for upper case?

2) I also can't get the program to loop for some reason

Thanks

1) There is a function called toupper, too.
2) Think about the logic of your program, how it works now and how you want it to work.