I am having trouble with the toupper function.

[gdarian216]

I am tring to write a program that takes a input char and if it is lower case changes it to capital, then outputs the value. If it is already capital it just outputs the value. this is what i was thinking but it isnt working.
#include<iostream>
#include<cctype>
using namespace std;

int main()
{
char a;
cin >> a
while (cin.get(chr))
{
int toupper(a);
static_cast<char>(int) toupper(a));
cout << a;

}}
i guess my real problem is i really dont understand how the get function works with the int toupper.

[Banfa]

what is wrong with

int main()
{
    char a;
 
    cin >> a
    a = (char)toupper(a);
    cout << a;
 
    return 0;
}
 

?

[gdarian216]

what is wrong with

int main()
{
    char a;
 
    cin >> a
    a = (char)toupper(a);
    cout << a;
 
    return 0;
}
 

?

thanks a lot i think i was doin 2 much with it.