How to call function of which parameter is reference type

[Jeff0803]

There's a char array.

char v[] = {'0','1','2','3','4','5','6','7','8','9','\n',NULL};

And there's a function.

void fr(char& r)
{
char* p = &r;
while (*p)
cout<<*p++;
}
How to call function fr()?

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