What will be the output of the following C++ code?

#include <stdio.h>
#include <ctype.h>
int main ()
{
    int i = 0;
    int cx = 0;
    char str[] = "Hello, welcome!";
    while (str[i])
    {
        if (ispunct(str[i])) cx++;
            i++;
    }    
    printf ("%d\n", cx);
    return 0;
}