working on capitolization program

So I working on a program that is supposed to accept all letters and make the vowels uppercase. the problem I am having is the isvowel part. I am not sure how to make it work correctly. I think I have the basic structure down, and am probably missing something minor to get it to work. I am a newbie so any help would be greatly appreciated. Oh and I am not sure how to make the or symbol with my computer so that would probably be a good start to helping me.

here's what I have

Code:

---

#include <ctype.h>

int main(void)
{
int c, isvowel();

while ((c=getchar()) !=EOF)
if (is vowel(c))
putchar(toupper(c));
else
putchar(c);
return 0;

int isvowel(c)
{...}

---

Well you could start by making your function compare the passed argument with each vowel to see if it matches.


Quzah.

Start with

Code:

---

int isvowel(c)
{
    return 1;
}

---

Then refine the content of the function until it actually does what you want it to.

It also smells like you're trying to define the function isvowel() inside main. C doesn't allow nested functions.

Code:

---

c = tolower(c);
if (c == 'a' || c == 'e' || ...)
    ...

---

That should get you started.