c++ - Converting to Uppercase adds an extra letter at the end?

Question

I'm trying to convert my char array into all uppercases. For some reason, it comes out all uppercase with an extra lowercase letter at the end. (Ex: entering "wow" would have the output "WOWw") I've tried using a for loop and incrementing 'i' with that but that doesn't work either. What's wrong with my code?

int i=0;
char c;//added these in just in case I declared it wrong
char a[80], str(50);

while (a[i])
{
    c=a[i];
    putchar (toupper(c));
    i++;
}

cout << c << endl;

EDIT: Nevermind, figured it out now. It was a stupid mistake haha.

Answer 1

That is because you are explicitly outputting c after your loop is done. c holds the last character that was processed inside the loop. Simply remove that additional output, you don't need it.

while (a[i])
{
    c=a[i];
    //putchar (toupper(c));
    cout << (char) toupper(c);
    i++;
}

cout << /*c <<*/ endl; //<-- here